Csharp/C Sharp/Event/Key Event — различия между версиями

Текущая версия на 11:34, 26 мая 2010

Содержание

1 Alt key pressed
2 Check KeyCode from KeyEventArgs
3 Close Form with Pressing X key
4 Control Key pressed
5 Displaying information about the key the user pressed
6 Displays a key pressed by the user
7 Get Async Key State
8 Get Key action information
9 Keyboard Sample
10 Key Press
11 Key Timer
12 Shift key pressed

Alt key pressed

using System;
using System.Collections.Generic;
using System.ruponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
public class Form1 : Form
{
   [DllImport("User32.dll")]
   private static extern short GetAsyncKeyState( System.Windows.Forms.Keys vKey); 
  private System.Windows.Forms.TextBox textBox1;
  private System.Windows.Forms.Label lbl;
  private System.Windows.Forms.Button cmdAsyncState;
  public Form1() {
        InitializeComponent();
  }
  private void Form1_KeyPress(object sender, KeyPressEventArgs e)
  {
    e.Handled = true;
  }
  private void Form1_KeyDown(object sender, KeyEventArgs e)
  {
    lbl.Text = "Key Down: " + e.KeyValue.ToString();
    lbl.Text += "\nKey Code: " + e.KeyCode.ToString();
    lbl.Text += "\nKey Data: " + e.KeyData.ToString();
    if ((e.Modifiers & Keys.Shift) == Keys.Shift)
    {
      lbl.Text += "\n" + "Shift was held down.";
    }
    if ((e.Modifiers & Keys.Control) == Keys.Control)
    {
      lbl.Text += "\n" + "Control was held down.";
    }
    if (e.Alt)
    {
      lbl.Text += "\n" + "Alt was held down.";
    }
  }
  private void cmdAsyncState_Click(object sender, EventArgs e)
  {
    int state = Convert.ToInt32(GetAsyncKeyState(Keys.A).ToString());
    switch (state)
    {
      case 0:
        lbl.Text = "A has not been pressed since the last call.";
        break;
      case 1:
        lbl.Text = "A is not currently pressed, but has been pressed since the last call.";
          break;
      case -32767:
        lbl.Text = "A is currently pressed.";
        break;
    }
  }
  private void InitializeComponent()
  {
    this.textBox1 = new System.Windows.Forms.TextBox();
    this.lbl = new System.Windows.Forms.Label();
    this.cmdAsyncState = new System.Windows.Forms.Button();
    this.SuspendLayout();
    // 
    // textBox1
    // 
    this.textBox1.Location = new System.Drawing.Point(36, 36);
    this.textBox1.Name = "textBox1";
    this.textBox1.Size = new System.Drawing.Size(205, 21);
    this.textBox1.TabIndex = 0;
    this.textBox1.Text = "<Text will never appear here>";
    // 
    // lbl
    // 
    this.lbl.AutoSize = true;
    this.lbl.Location = new System.Drawing.Point(35, 77);
    this.lbl.Name = "lbl";
    this.lbl.Size = new System.Drawing.Size(0, 0);
    this.lbl.TabIndex = 1;
    // 
    // cmdAsyncState
    // 
    this.cmdAsyncState.Location = new System.Drawing.Point(36, 202);
    this.cmdAsyncState.Name = "cmdAsyncState";
    this.cmdAsyncState.Size = new System.Drawing.Size(141, 24);
    this.cmdAsyncState.TabIndex = 2;
    this.cmdAsyncState.Text = "GetAsyncState() for \"A\"";
    this.cmdAsyncState.Click += new System.EventHandler(this.cmdAsyncState_Click);
    // 
    // Form1
    // 
    this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
    this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
    this.ClientSize = new System.Drawing.Size(292, 266);
    this.Controls.Add(this.cmdAsyncState);
    this.Controls.Add(this.lbl);
    this.Controls.Add(this.textBox1);
    this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
    this.KeyPreview = true;
    this.Name = "Form1";
    this.Text = "KeyTest";
    this.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.Form1_KeyPress);
    this.KeyDown += new System.Windows.Forms.KeyEventHandler(this.Form1_KeyDown);
    this.ResumeLayout(false);
    this.PerformLayout();
  }

  [STAThread]
  static void Main()
  {
    Application.EnableVisualStyles();
    Application.Run(new Form1());
  }
}

Check KeyCode from KeyEventArgs

using System;
using System.Drawing;
using System.Windows.Forms;
   
class ExitOnX: Form
{
     public static void Main()
     {
          Application.Run(new ExitOnX());
     }
     public ExitOnX()
     {
          Text = "Exit on X";
     }
     protected override void OnKeyDown(KeyEventArgs kea)
     {
          if (kea.KeyCode == Keys.X)
               Close();
     }
}

Close Form with Pressing X key

using System;
using System.Drawing;
using System.Windows.Forms;
   
class ExitOnX: Form
{
     public static void Main()
     {
          Application.Run(new ExitOnX());
     }
     public ExitOnX()
     {
          Text = "Exit on X";
     }
     protected override void OnKeyDown(KeyEventArgs kea)
     {
          if (kea.KeyCode == Keys.X)
               Close();
     }
}

Control Key pressed

using System;
using System.Collections.Generic;
using System.ruponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
public class Form1 : Form
{
   [DllImport("User32.dll")]
   private static extern short GetAsyncKeyState( System.Windows.Forms.Keys vKey); 
  private System.Windows.Forms.TextBox textBox1;
  private System.Windows.Forms.Label lbl;
  private System.Windows.Forms.Button cmdAsyncState;
  public Form1() {
        InitializeComponent();
  }
  private void Form1_KeyPress(object sender, KeyPressEventArgs e)
  {
    e.Handled = true;
  }
  private void Form1_KeyDown(object sender, KeyEventArgs e)
  {
    lbl.Text = "Key Down: " + e.KeyValue.ToString();
    lbl.Text += "\nKey Code: " + e.KeyCode.ToString();
    lbl.Text += "\nKey Data: " + e.KeyData.ToString();
    if ((e.Modifiers & Keys.Shift) == Keys.Shift)
    {
      lbl.Text += "\n" + "Shift was held down.";
    }
    if ((e.Modifiers & Keys.Control) == Keys.Control)
    {
      lbl.Text += "\n" + "Control was held down.";
    }
    if (e.Alt)
    {
      lbl.Text += "\n" + "Alt was held down.";
    }
  }
  private void cmdAsyncState_Click(object sender, EventArgs e)
  {
    int state = Convert.ToInt32(GetAsyncKeyState(Keys.A).ToString());
    switch (state)
    {
      case 0:
        lbl.Text = "A has not been pressed since the last call.";
        break;
      case 1:
        lbl.Text = "A is not currently pressed, but has been pressed since the last call.";
          break;
      case -32767:
        lbl.Text = "A is currently pressed.";
        break;
    }
  }
  private void InitializeComponent()
  {
    this.textBox1 = new System.Windows.Forms.TextBox();
    this.lbl = new System.Windows.Forms.Label();
    this.cmdAsyncState = new System.Windows.Forms.Button();
    this.SuspendLayout();
    // 
    // textBox1
    // 
    this.textBox1.Location = new System.Drawing.Point(36, 36);
    this.textBox1.Name = "textBox1";
    this.textBox1.Size = new System.Drawing.Size(205, 21);
    this.textBox1.TabIndex = 0;
    this.textBox1.Text = "<Text will never appear here>";
    // 
    // lbl
    // 
    this.lbl.AutoSize = true;
    this.lbl.Location = new System.Drawing.Point(35, 77);
    this.lbl.Name = "lbl";
    this.lbl.Size = new System.Drawing.Size(0, 0);
    this.lbl.TabIndex = 1;
    // 
    // cmdAsyncState
    // 
    this.cmdAsyncState.Location = new System.Drawing.Point(36, 202);
    this.cmdAsyncState.Name = "cmdAsyncState";
    this.cmdAsyncState.Size = new System.Drawing.Size(141, 24);
    this.cmdAsyncState.TabIndex = 2;
    this.cmdAsyncState.Text = "GetAsyncState() for \"A\"";
    this.cmdAsyncState.Click += new System.EventHandler(this.cmdAsyncState_Click);
    // 
    // Form1
    // 
    this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
    this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
    this.ClientSize = new System.Drawing.Size(292, 266);
    this.Controls.Add(this.cmdAsyncState);
    this.Controls.Add(this.lbl);
    this.Controls.Add(this.textBox1);
    this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
    this.KeyPreview = true;
    this.Name = "Form1";
    this.Text = "KeyTest";
    this.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.Form1_KeyPress);
    this.KeyDown += new System.Windows.Forms.KeyEventHandler(this.Form1_KeyDown);
    this.ResumeLayout(false);
    this.PerformLayout();
  }

  [STAThread]
  static void Main()
  {
    Application.EnableVisualStyles();
    Application.Run(new Form1());
  }
}

Displaying information about the key the user pressed

   using System;
   using System.Drawing;
   using System.Collections;
   using System.ruponentModel;
   using System.Windows.Forms;
   using System.Data;
   public class KeyDemo : System.Windows.Forms.Form
   {
      private System.Windows.Forms.Label charLabel;
      private System.Windows.Forms.Label keyInfoLabel;
      public KeyDemo()
      {
         InitializeComponent();
      }
      private void InitializeComponent()
      {
         this.charLabel = new System.Windows.Forms.Label();
         this.keyInfoLabel = new System.Windows.Forms.Label();
         this.SuspendLayout();
         this.charLabel.Font = new System.Drawing.Font("Microsoft Sans Serif", 12F);
         this.charLabel.Location = new System.Drawing.Point(8, 8);
         this.charLabel.Name = "charLabel";
         this.charLabel.Size = new System.Drawing.Size(168, 32);
         this.charLabel.TabIndex = 0;
         this.keyInfoLabel.Font = new System.Drawing.Font("Microsoft Sans Serif", 12F);
         this.keyInfoLabel.Location = new System.Drawing.Point(8, 56);
         this.keyInfoLabel.Name = "keyInfoLabel";
         this.keyInfoLabel.Size = new System.Drawing.Size(168, 136);
         this.keyInfoLabel.TabIndex = 0;
         this.AutoScaleBaseSize = new System.Drawing.Size(15, 37);
         this.ClientSize = new System.Drawing.Size(184, 197);
         this.Controls.AddRange(new System.Windows.Forms.Control[] {this.keyInfoLabel,this.charLabel});
         this.Font = new System.Drawing.Font("Microsoft Sans Serif", 24F);
         this.Name = "Key Demo";
         this.Text = "Key Demo";
         this.KeyDown +=new System.Windows.Forms.KeyEventHandler(this.KeyDemo_KeyDown );
         this.KeyPress +=new System.Windows.Forms.KeyPressEventHandler(this.KeyDemo_KeyPress );
         this.KeyUp +=new System.Windows.Forms.KeyEventHandler(this.KeyDemo_KeyUp );
         
         this.ResumeLayout(false);
      }
      [STAThread]
      static void Main() 
      {
         Application.Run( new KeyDemo() );
      }
      protected void KeyDemo_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e )
      {  
         charLabel.Text = "Key pressed: " + e.KeyChar;
      }
      private void KeyDemo_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e )
      {
         keyInfoLabel.Text = 
            "Alt: " + (e.Alt ? "Yes" : "No") + "\n" +
            "Shift: " + (e.Shift ? "Yes" : "No" ) + "\n" +
            "Ctrl: " + (e.Control ? "Yes" : "No" ) + "\n" + 
            "KeyCode: " + e.KeyCode + "\n" +
            "KeyData: " + e.KeyData + "\n" +
            "KeyValue: " + e.KeyValue;                               
      }
   
      private void KeyDemo_KeyUp(object sender, System.Windows.Forms.KeyEventArgs e )
      {
        Console.WriteLine("Key up");
      }
   }

Displays a key pressed by the user

using System.Drawing;
using System;
using System.Windows.Forms;
public class TryKey : Form {
  private char theKey = "d"; 
  public TryKey() {
    Size = new Size(300,200);
    BackColor = Color.White;
  }
  protected override void OnPaint(PaintEventArgs e) {
    Graphics g = e.Graphics;                                                                  
    g.DrawString(theKey.ToString(), new Font("Arial", 36, FontStyle.Bold), Brushes.Red, 100, 50);
    base.OnPaint(e); 
  }
  protected override void OnKeyDown(KeyEventArgs e){
    if (e.Control){
       Console.WriteLine("Control");
    }
    if (e.KeyCode == Keys.Right){
       Console.WriteLine("Right");
    }
    else if (e.KeyCode == Keys.Left){
       Console.WriteLine("Left");
    }
    Invalidate(); 
    base.OnKeyDown(e);  
  }
  protected override void OnKeyUp(KeyEventArgs e) { 
    Console.WriteLine("Key Up");
    base.OnKeyUp(e);
  }
  protected override void OnKeyPress(KeyPressEventArgs e) {
    if (char.IsLetterOrDigit(e.KeyChar)){
      theKey = e.KeyChar;
    }  
    Invalidate(); 
    base.OnKeyPress(e);
  }
  public static void Main() {
    Application.Run(new TryKey());
  }
}

Get Async Key State

using System;
using System.Collections.Generic;
using System.ruponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
public class Form1 : Form
{
   [DllImport("User32.dll")]
   private static extern short GetAsyncKeyState( System.Windows.Forms.Keys vKey); 
  private System.Windows.Forms.TextBox textBox1;
  private System.Windows.Forms.Label lbl;
  private System.Windows.Forms.Button cmdAsyncState;
  public Form1() {
        InitializeComponent();
  }
  private void Form1_KeyPress(object sender, KeyPressEventArgs e)
  {
    e.Handled = true;
  }
  private void Form1_KeyDown(object sender, KeyEventArgs e)
  {
    lbl.Text = "Key Down: " + e.KeyValue.ToString();
    lbl.Text += "\nKey Code: " + e.KeyCode.ToString();
    lbl.Text += "\nKey Data: " + e.KeyData.ToString();
    if ((e.Modifiers & Keys.Shift) == Keys.Shift)
    {
      lbl.Text += "\n" + "Shift was held down.";
    }
    if ((e.Modifiers & Keys.Control) == Keys.Control)
    {
      lbl.Text += "\n" + "Control was held down.";
    }
    if (e.Alt)
    {
      lbl.Text += "\n" + "Alt was held down.";
    }
  }
  private void cmdAsyncState_Click(object sender, EventArgs e)
  {
    int state = Convert.ToInt32(GetAsyncKeyState(Keys.A).ToString());
    switch (state)
    {
      case 0:
        lbl.Text = "A has not been pressed since the last call.";
        break;
      case 1:
        lbl.Text = "A is not currently pressed, but has been pressed since the last call.";
          break;
      case -32767:
        lbl.Text = "A is currently pressed.";
        break;
    }
  }
  private void InitializeComponent()
  {
    this.textBox1 = new System.Windows.Forms.TextBox();
    this.lbl = new System.Windows.Forms.Label();
    this.cmdAsyncState = new System.Windows.Forms.Button();
    this.SuspendLayout();
    // 
    // textBox1
    // 
    this.textBox1.Location = new System.Drawing.Point(36, 36);
    this.textBox1.Name = "textBox1";
    this.textBox1.Size = new System.Drawing.Size(205, 21);
    this.textBox1.TabIndex = 0;
    this.textBox1.Text = "<Text will never appear here>";
    // 
    // lbl
    // 
    this.lbl.AutoSize = true;
    this.lbl.Location = new System.Drawing.Point(35, 77);
    this.lbl.Name = "lbl";
    this.lbl.Size = new System.Drawing.Size(0, 0);
    this.lbl.TabIndex = 1;
    // 
    // cmdAsyncState
    // 
    this.cmdAsyncState.Location = new System.Drawing.Point(36, 202);
    this.cmdAsyncState.Name = "cmdAsyncState";
    this.cmdAsyncState.Size = new System.Drawing.Size(141, 24);
    this.cmdAsyncState.TabIndex = 2;
    this.cmdAsyncState.Text = "GetAsyncState() for \"A\"";
    this.cmdAsyncState.Click += new System.EventHandler(this.cmdAsyncState_Click);
    // 
    // Form1
    // 
    this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
    this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
    this.ClientSize = new System.Drawing.Size(292, 266);
    this.Controls.Add(this.cmdAsyncState);
    this.Controls.Add(this.lbl);
    this.Controls.Add(this.textBox1);
    this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
    this.KeyPreview = true;
    this.Name = "Form1";
    this.Text = "KeyTest";
    this.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.Form1_KeyPress);
    this.KeyDown += new System.Windows.Forms.KeyEventHandler(this.Form1_KeyDown);
    this.ResumeLayout(false);
    this.PerformLayout();
  }

  [STAThread]
  static void Main()
  {
    Application.EnableVisualStyles();
    Application.Run(new Form1());
  }
}

Get Key action information

using System;
using System.Collections.Generic;
using System.ruponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
public class Form1 : Form
{
    private System.Windows.Forms.GroupBox GroupBox1;
    private System.Windows.Forms.Label Label4;
    private System.Windows.Forms.Label Label1;
    private System.Windows.Forms.PictureBox pic;
    private System.Windows.Forms.TextBox txt;
    private System.Windows.Forms.Button cmd;
    private System.Windows.Forms.Label Label2;
    private System.Windows.Forms.Label Label3;
    private System.Windows.Forms.ListBox eventLogList;
    public Form1() {
        InitializeComponent();
    }
    private void Log(String data)
    {
        eventLogList.Items.Add(data);
        int itemsPerPage = (int)(eventLogList.Height / eventLogList.ItemHeight);
        eventLogList.TopIndex = eventLogList.Items.Count - itemsPerPage;
    }
    private void txt_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e)
    {
        Log("Key Down: " + e.KeyCode.ToString() + e.KeyValue.ToString());
    }
    private void txt_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e)
    {
        Log("Key Press: " + e.KeyChar.ToString());
    }
    private void txt_KeyUp(object sender, System.Windows.Forms.KeyEventArgs e)
    {
        Log("Key Up: " + e.KeyCode.ToString() + e.KeyValue.ToString() + " Text is: " + txt.Text);
    }
    private void txt_TextChanged(object sender, System.EventArgs e)
    {
        Log("Changed: " + " Text is: " + txt.Text);
    }
    private void pic_MouseEnter(object sender, System.EventArgs e)
    {
        Log("Mouse Enter");
    }
    private void pic_MouseHover(object sender, System.EventArgs e)
    {
        Log("Mouse Hover");
    }
    private void pic_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
    {
        Log("Mouse Down: X=" + e.X.ToString() + " Y=" + e.Y.ToString() + " Button=" + e.Button.ToString());
    }
    private void pic_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
    {
        Log("Mouse Up: X=" + e.X.ToString() + " Y=" + e.Y.ToString() + " Button=" + e.Button.ToString());
    }
    private void pic_Click(object sender, System.EventArgs e)
    {
        Log("Click");
    }
    private void pic_DoubleClick(object sender, System.EventArgs e)
    {
        Log("Double Click");
    }
    private void pic_MouseLeave(object sender, System.EventArgs e)
    {
        Log("Mouse Leave");
    }
    private void InitializeComponent()
    {
        this.GroupBox1 = new System.Windows.Forms.GroupBox();
        this.Label4 = new System.Windows.Forms.Label();
        this.Label1 = new System.Windows.Forms.Label();
        this.pic = new System.Windows.Forms.PictureBox();
        this.txt = new System.Windows.Forms.TextBox();
        this.cmd = new System.Windows.Forms.Button();
        this.Label2 = new System.Windows.Forms.Label();
        this.Label3 = new System.Windows.Forms.Label();
        this.eventLogList = new System.Windows.Forms.ListBox();
        this.GroupBox1.SuspendLayout();
        ((System.ruponentModel.ISupportInitialize)(this.pic)).BeginInit();
        this.SuspendLayout();
        // 
        // GroupBox1
        // 
        this.GroupBox1.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
                    | System.Windows.Forms.AnchorStyles.Right)));
        this.GroupBox1.Controls.Add(this.Label4);
        this.GroupBox1.Controls.Add(this.Label1);
        this.GroupBox1.Controls.Add(this.pic);
        this.GroupBox1.Controls.Add(this.txt);
        this.GroupBox1.Controls.Add(this.cmd);
        this.GroupBox1.Controls.Add(this.Label2);
        this.GroupBox1.FlatStyle = System.Windows.Forms.FlatStyle.System;
        this.GroupBox1.Location = new System.Drawing.Point(7, 0);
        this.GroupBox1.Name = "GroupBox1";
        this.GroupBox1.Size = new System.Drawing.Size(384, 148);
        this.GroupBox1.TabIndex = 12;
        this.GroupBox1.TabStop = false;
        // 
        // Label4
        // 
        this.Label4.Location = new System.Drawing.Point(92, 108);
        this.Label4.Name = "Label4";
        this.Label4.Size = new System.Drawing.Size(56, 16);
        this.Label4.TabIndex = 5;
        this.Label4.Text = "And here:";
        // 
        // Label1
        // 
        this.Label1.Location = new System.Drawing.Point(6, 24);
        this.Label1.Name = "Label1";
        this.Label1.Size = new System.Drawing.Size(144, 16);
        this.Label1.TabIndex = 2;
        this.Label1.Text = "Test keyboard events here:";
        // 
        // pic
        // 
        this.pic.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
        this.pic.Location = new System.Drawing.Point(156, 48);
        this.pic.Name = "pic";
        this.pic.Size = new System.Drawing.Size(192, 48);
        this.pic.TabIndex = 3;
        this.pic.TabStop = false;
        this.pic.DoubleClick += new System.EventHandler(this.pic_DoubleClick);
        this.pic.Click += new System.EventHandler(this.pic_Click);
        this.pic.MouseHover += new System.EventHandler(this.pic_MouseHover);
        this.pic.MouseUp += new System.Windows.Forms.MouseEventHandler(this.pic_MouseUp);
        this.pic.MouseEnter += new System.EventHandler(this.pic_MouseEnter);
        this.pic.MouseDown += new System.Windows.Forms.MouseEventHandler(this.pic_MouseDown);
        // 
        // txt
        // 
        this.txt.Location = new System.Drawing.Point(156, 20);
        this.txt.Name = "txt";
        this.txt.Size = new System.Drawing.Size(192, 21);
        this.txt.TabIndex = 1;
        this.txt.KeyUp += new System.Windows.Forms.KeyEventHandler(this.txt_KeyUp);
        this.txt.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.txt_KeyPress);
        this.txt.TextChanged += new System.EventHandler(this.txt_TextChanged);
        this.txt.KeyDown += new System.Windows.Forms.KeyEventHandler(this.txt_KeyDown);
        // 
        // cmd
        // 
        this.cmd.FlatStyle = System.Windows.Forms.FlatStyle.System;
        this.cmd.Location = new System.Drawing.Point(156, 100);
        this.cmd.Name = "cmd";
        this.cmd.Size = new System.Drawing.Size(88, 28);
        this.cmd.TabIndex = 4;
        this.cmd.Text = "Button1";
        this.cmd.MouseLeave += new System.EventHandler(this.pic_MouseLeave);
        this.cmd.Click += new System.EventHandler(this.pic_Click);
        this.cmd.MouseEnter += new System.EventHandler(this.pic_MouseEnter);
        this.cmd.MouseHover += new System.EventHandler(this.pic_MouseHover);
        this.cmd.MouseUp += new System.Windows.Forms.MouseEventHandler(this.pic_MouseUp);
        this.cmd.MouseDown += new System.Windows.Forms.MouseEventHandler(this.pic_MouseDown);
        // 
        // Label2
        // 
        this.Label2.Location = new System.Drawing.Point(20, 52);
        this.Label2.Name = "Label2";
        this.Label2.Size = new System.Drawing.Size(128, 16);
        this.Label2.TabIndex = 2;
        this.Label2.Text = "Test mouse events here:";
        // 
        // Label3
        // 
        this.Label3.Location = new System.Drawing.Point(23, 100);
        this.Label3.Name = "Label3";
        this.Label3.Size = new System.Drawing.Size(64, 24);
        this.Label3.TabIndex = 11;
        this.Label3.Text = "Label3";
        // 
        // eventLogList
        // 
        this.eventLogList.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
                    | System.Windows.Forms.AnchorStyles.Left)
                    | System.Windows.Forms.AnchorStyles.Right)));
        this.eventLogList.FormattingEnabled = true;
        this.eventLogList.IntegralHeight = false;
        this.eventLogList.Location = new System.Drawing.Point(7, 156);
        this.eventLogList.Name = "eventLogList";
        this.eventLogList.Size = new System.Drawing.Size(384, 212);
        this.eventLogList.TabIndex = 10;
        // 
        // Form1
        // 
        this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
        this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
        this.ClientSize = new System.Drawing.Size(399, 374);
        this.Controls.Add(this.GroupBox1);
        this.Controls.Add(this.Label3);
        this.Controls.Add(this.eventLogList);
        this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
        this.Name = "Form1";
        this.Text = "Event Tracker";
        this.GroupBox1.ResumeLayout(false);
        this.GroupBox1.PerformLayout();
        ((System.ruponentModel.ISupportInitialize)(this.pic)).EndInit();
        this.ResumeLayout(false);
    }
    [STAThread]
    static void Main()
    {
        Application.EnableVisualStyles();
        Application.Run(new Form1());
    }
}

Keyboard Sample

/*
Professional Windows GUI Programming Using C#
by Jay Glynn, Csaba Torok, Richard Conway, Wahid Choudhury, 
   Zach Greenvoss, Shripad Kulkarni, Neil Whitlow
Publisher: Peer Information
ISBN: 1861007663
*/
using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
using System.Text;
namespace KeyboardSample
{
    /// <summary>
    /// Summary description for KeyboardSample.
    /// </summary>
    public class KeyboardSample : System.Windows.Forms.Form
    {
      private System.Windows.Forms.TextBox textBox1;
      private System.Windows.Forms.TextBox textBox2;
      private System.Windows.Forms.GroupBox groupBox1;
      private System.Windows.Forms.Label label1;
      private System.Windows.Forms.GroupBox groupBox2;
      private System.Windows.Forms.Label label2;
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ruponentModel.Container components = null;
        public KeyboardSample()
        {
            //
            // Required for Windows Form Designer support
            //
            InitializeComponent();
            //
            // TODO: Add any constructor code after InitializeComponent call
            //
        }
        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if (components != null) 
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }
        #region Windows Form Designer generated code
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
         this.textBox1 = new System.Windows.Forms.TextBox();
         this.textBox2 = new System.Windows.Forms.TextBox();
         this.groupBox1 = new System.Windows.Forms.GroupBox();
         this.label1 = new System.Windows.Forms.Label();
         this.groupBox2 = new System.Windows.Forms.GroupBox();
         this.label2 = new System.Windows.Forms.Label();
         this.groupBox1.SuspendLayout();
         this.groupBox2.SuspendLayout();
         this.SuspendLayout();
         // 
         // textBox1
         // 
         this.textBox1.Location = new System.Drawing.Point(16, 24);
         this.textBox1.Name = "textBox1";
         this.textBox1.Size = new System.Drawing.Size(168, 20);
         this.textBox1.TabIndex = 5;
         this.textBox1.Text = "";
         this.textBox1.KeyDown += new System.Windows.Forms.KeyEventHandler(this.textBox1_KeyDown);
         // 
         // textBox2
         // 
         this.textBox2.Location = new System.Drawing.Point(16, 24);
         this.textBox2.Name = "textBox2";
         this.textBox2.Size = new System.Drawing.Size(168, 20);
         this.textBox2.TabIndex = 6;
         this.textBox2.Text = "";
         this.textBox2.KeyDown += new System.Windows.Forms.KeyEventHandler(this.textBox2_KeyDown);
         // 
         // groupBox1
         // 
         this.groupBox1.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                                this.label1,
                                                                                this.textBox1});
         this.groupBox1.Location = new System.Drawing.Point(8, 8);
         this.groupBox1.Name = "groupBox1";
         this.groupBox1.TabIndex = 7;
         this.groupBox1.TabStop = false;
         this.groupBox1.Text = "Key Monitor";
         // 
         // label1
         // 
         this.label1.Location = new System.Drawing.Point(16, 64);
         this.label1.Name = "label1";
         this.label1.Size = new System.Drawing.Size(168, 20);
         this.label1.TabIndex = 6;
         // 
         // groupBox2
         // 
         this.groupBox2.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                                this.textBox2,
                                                                                this.label2});
         this.groupBox2.Location = new System.Drawing.Point(8, 120);
         this.groupBox2.Name = "groupBox2";
         this.groupBox2.TabIndex = 8;
         this.groupBox2.TabStop = false;
         this.groupBox2.Text = "Keys Enumeration";
         // 
         // label2
         // 
         this.label2.Location = new System.Drawing.Point(16, 64);
         this.label2.Name = "label2";
         this.label2.Size = new System.Drawing.Size(168, 20);
         this.label2.TabIndex = 9;
         // 
         // KeyboardSample
         // 
         this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
         this.ClientSize = new System.Drawing.Size(216, 229);
         this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                      this.groupBox2,
                                                                      this.groupBox1});
         this.Name = "KeyboardSample";
         this.Text = "KeyboardSample";
         this.groupBox1.ResumeLayout(false);
         this.groupBox2.ResumeLayout(false);
         this.ResumeLayout(false);
      }
        #endregion
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main() 
        {
            Application.Run(new KeyboardSample());
        }
      private void textBox1_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e)
      {
         label1.Text = Convert.ToString(e.KeyValue);
      }
      private void textBox2_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e)
      {
         StringBuilder sb = new StringBuilder();
         if(e.Shift) sb.Append("Shift, ");
         if(e.Alt) sb.Append("Alt, ");
         if(e.Control) sb.Append("Ctrl, ");
                    
         if(e.KeyCode==Keys.W||e.KeyCode==Keys.R||e.KeyCode==Keys.O||e.KeyCode==Keys.X)
         {
            sb.Append("Wrox Press!!");
         }
         else if(e.KeyCode==Keys.Escape&&e.Modifiers==(Keys.Shift|Keys.Alt))
         {
            sb.Append("Escape - that won"t work!");
         }
         else if(e.KeyCode == Keys.C && e.Modifiers==(Keys.Alt | Keys.Control))
         {
            sb.Append("CopyRight");
            textBox2.SelectedText = "CopyRight";
            textBox2.SelectionLength = 0;
         }
         else 
         {
            sb.Append(Convert.ToString(e.KeyData));
         }
         label2.Text = sb.ToString();
      }
    }
}

Key Press

/*
GDI+ Programming in C# and VB .NET
by Nick Symmonds
Publisher: Apress
ISBN: 159059035X
*/

using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
namespace KeyPress
{
    /// <summary>
    /// Summary description for KeyPress.
    /// </summary>
    public class KeyPress : System.Windows.Forms.Form
    {
    private System.Windows.Forms.Button button1;
    private System.Windows.Forms.Button button2;
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ruponentModel.Container components = null;
        public KeyPress()
        {
            //
            // Required for Windows Form Designer support
            //
            InitializeComponent();
            //
            // TODO: Add any constructor code after InitializeComponent call
            //
        }
        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if (components != null) 
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }
        #region Windows Form Designer generated code
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
      this.button1 = new System.Windows.Forms.Button();
      this.button2 = new System.Windows.Forms.Button();
      this.SuspendLayout();
      // 
      // button1
      // 
      this.button1.Location = new System.Drawing.Point(184, 104);
      this.button1.Name = "button1";
      this.button1.Size = new System.Drawing.Size(80, 48);
      this.button1.TabIndex = 0;
      this.button1.Text = "button1";
      // 
      // button2
      // 
      this.button2.Location = new System.Drawing.Point(176, 192);
      this.button2.Name = "button2";
      this.button2.Size = new System.Drawing.Size(80, 32);
      this.button2.TabIndex = 1;
      this.button2.Text = "button2";
      // 
      // KeyPress
      // 
      this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
      this.ClientSize = new System.Drawing.Size(292, 273);
      this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                  this.button2,
                                                                  this.button1});
      this.Name = "KeyPress";
      this.Text = "KeyPress";
      this.Load += new System.EventHandler(this.KeyPress_Load);
      this.ResumeLayout(false);
    }
        #endregion
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main() 
        {
            Application.Run(new KeyPress());
        }
    private void KeyPress_Load(object sender, System.EventArgs e)
    {
      this.KeyPreview=true;
    }
    protected override void OnKeyPress(KeyPressEventArgs e)
    {
      MessageBox.Show("Key Pressed = " + e.KeyChar.ToString());
    }
    }
}

Key Timer

/*
Professional Windows GUI Programming Using C#
by Jay Glynn, Csaba Torok, Richard Conway, Wahid Choudhury, 
   Zach Greenvoss, Shripad Kulkarni, Neil Whitlow
Publisher: Peer Information
ISBN: 1861007663
*/
using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
using System.Runtime.InteropServices;
namespace Wrox.ProgrammingWindowsGUI.Chapter5
{
    /// <summary>
    /// Summary description for Form1.
    /// </summary>
    public class KeyTimer : System.Windows.Forms.Form
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ruponentModel.Container components = null;
        private uint start = 0;
        private uint stop = 0;
        [DllImport("kernel32.dll")]
        public static extern uint GetTickCount();
        public KeyTimer()
        {
            //
            // Required for Windows Form Designer support
            //
            //InitializeComponent();
            //
            // TODO: Add any constructor code after InitializeComponent call
            //
        }
        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if (components != null) 
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }
        #region Windows Form Designer generated code
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            // 
            // Form1
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.ClientSize = new System.Drawing.Size(292, 142);
            this.Name = "Form1";
            this.Text = "Form1";
        }
        #endregion
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main() 
        {
            Application.Run(new KeyTimer());
            
        }
        protected override void OnKeyDown(KeyEventArgs args)
        {
            start = GetTickCount();
        }
        protected override void OnKeyUp(KeyEventArgs args)
        {
            stop = GetTickCount();
            uint elapsed = (stop - start);
            MessageBox.Show(Convert.ToString(args.KeyData)+", time elapsed: "+Convert.ToString(elapsed)+" msecs");
        }
    }
}

Shift key pressed

using System;
using System.Collections.Generic;
using System.ruponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
public class Form1 : Form
{
   [DllImport("User32.dll")]
   private static extern short GetAsyncKeyState( System.Windows.Forms.Keys vKey); 
  private System.Windows.Forms.TextBox textBox1;
  private System.Windows.Forms.Label lbl;
  private System.Windows.Forms.Button cmdAsyncState;
  public Form1() {
        InitializeComponent();
  }
  private void Form1_KeyPress(object sender, KeyPressEventArgs e)
  {
    e.Handled = true;
  }
  private void Form1_KeyDown(object sender, KeyEventArgs e)
  {
    lbl.Text = "Key Down: " + e.KeyValue.ToString();
    lbl.Text += "\nKey Code: " + e.KeyCode.ToString();
    lbl.Text += "\nKey Data: " + e.KeyData.ToString();
    if ((e.Modifiers & Keys.Shift) == Keys.Shift)
    {
      lbl.Text += "\n" + "Shift was held down.";
    }
    if ((e.Modifiers & Keys.Control) == Keys.Control)
    {
      lbl.Text += "\n" + "Control was held down.";
    }
    if (e.Alt)
    {
      lbl.Text += "\n" + "Alt was held down.";
    }
  }
  private void cmdAsyncState_Click(object sender, EventArgs e)
  {
    int state = Convert.ToInt32(GetAsyncKeyState(Keys.A).ToString());
    switch (state)
    {
      case 0:
        lbl.Text = "A has not been pressed since the last call.";
        break;
      case 1:
        lbl.Text = "A is not currently pressed, but has been pressed since the last call.";
          break;
      case -32767:
        lbl.Text = "A is currently pressed.";
        break;
    }
  }
  private void InitializeComponent()
  {
    this.textBox1 = new System.Windows.Forms.TextBox();
    this.lbl = new System.Windows.Forms.Label();
    this.cmdAsyncState = new System.Windows.Forms.Button();
    this.SuspendLayout();
    // 
    // textBox1
    // 
    this.textBox1.Location = new System.Drawing.Point(36, 36);
    this.textBox1.Name = "textBox1";
    this.textBox1.Size = new System.Drawing.Size(205, 21);
    this.textBox1.TabIndex = 0;
    this.textBox1.Text = "<Text will never appear here>";
    // 
    // lbl
    // 
    this.lbl.AutoSize = true;
    this.lbl.Location = new System.Drawing.Point(35, 77);
    this.lbl.Name = "lbl";
    this.lbl.Size = new System.Drawing.Size(0, 0);
    this.lbl.TabIndex = 1;
    // 
    // cmdAsyncState
    // 
    this.cmdAsyncState.Location = new System.Drawing.Point(36, 202);
    this.cmdAsyncState.Name = "cmdAsyncState";
    this.cmdAsyncState.Size = new System.Drawing.Size(141, 24);
    this.cmdAsyncState.TabIndex = 2;
    this.cmdAsyncState.Text = "GetAsyncState() for \"A\"";
    this.cmdAsyncState.Click += new System.EventHandler(this.cmdAsyncState_Click);
    // 
    // Form1
    // 
    this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
    this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
    this.ClientSize = new System.Drawing.Size(292, 266);
    this.Controls.Add(this.cmdAsyncState);
    this.Controls.Add(this.lbl);
    this.Controls.Add(this.textBox1);
    this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
    this.KeyPreview = true;
    this.Name = "Form1";
    this.Text = "KeyTest";
    this.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.Form1_KeyPress);
    this.KeyDown += new System.Windows.Forms.KeyEventHandler(this.Form1_KeyDown);
    this.ResumeLayout(false);
    this.PerformLayout();
  }

  [STAThread]
  static void Main()
  {
    Application.EnableVisualStyles();
    Application.Run(new Form1());
  }
}

Csharp/C Sharp/Event/Key Event — различия между версиями

Текущая версия на 11:34, 26 мая 2010

Содержание

Alt key pressed

Check KeyCode from KeyEventArgs

Close Form with Pressing X key

Control Key pressed

Displaying information about the key the user pressed

Displays a key pressed by the user

Get Async Key State

Get Key action information

Keyboard Sample

Key Press

Key Timer

Shift key pressed

Навигация

Персональные инструменты

Пространства имён

Варианты

Просмотры

Ещё

Поиск

Разделы

Инструменты

Навигация

Текущая версия на 11:34, 26 мая 2010 (просмотреть исходный код) Admin (обсуждение \| вклад) м (1 версия)	Текущая версия на 11:34, 26 мая 2010 (просмотреть исходный код) Admin (обсуждение \| вклад) м (1 версия)
(нет различий)