Csharp/CSharp Tutorial/GUI Windows Forms/Form
Содержание
- 1 Add a Main Menu
- 2 Add control to Form dynamically
- 3 Build Form without by hand
- 4 Call form constructor to create a Form object
- 5 Cal Show method to display a form
- 6 Change Form Cursor
- 7 Change Form size in menu action
- 8 Form Dispose
- 9 Form message filter
- 10 Inherited Form
- 11 Inherit Form With Constructor
- 12 Irregular form
- 13 Move a Form in code
- 14 ResumeLayout and SuspendLayout
- 15 Scroll Form
- 16 Set Form Visible properties
- 17 Subclass Form
- 18 Text as the title
- 19 The difference between Form.Show and Application.Run()
- 20 The Hello, WindowsForms Application
- 21 Use Inherited form in a separate Main class
Add a Main Menu
<source lang="csharp">using System; using System.Windows.Forms;
class AddMenuForm : Form {
MainMenu MyMenu;
public AddMenuForm() {
Text = "Adding a Main Menu";
MyMenu = new MainMenu();
MenuItem m1 = new MenuItem("File");
MyMenu.MenuItems.Add(m1);
MenuItem m2 = new MenuItem("Tools");
MyMenu.MenuItems.Add(m2);
MenuItem subm1 = new MenuItem("Open");
m1.MenuItems.Add(subm1);
MenuItem subm2 = new MenuItem("Close");
m1.MenuItems.Add(subm2);
MenuItem subm3 = new MenuItem("Exit");
m1.MenuItems.Add(subm3);
MenuItem subm4 = new MenuItem("Coordinates");
m2.MenuItems.Add(subm4);
MenuItem subm5 = new MenuItem("Change Size");
m2.MenuItems.Add(subm5);
MenuItem subm6 = new MenuItem("Restore");
m2.MenuItems.Add(subm6);
subm1.Click += MMOpenClick;
subm2.Click += MMCloseClick;
subm3.Click += MMExitClick;
subm4.Click += MMCoordClick;
subm5.Click += MMChangeClick;
subm6.Click += MMRestoreClick;
Menu = MyMenu;
}
[STAThread]
public static void Main() {
AddMenuForm skel = new AddMenuForm();
Application.Run(skel);
}
protected void MMCoordClick(object who, EventArgs e) {
}
protected void MMChangeClick(object who, EventArgs e) {
}
protected void MMRestoreClick(object who, EventArgs e) {
}
protected void MMOpenClick(object who, EventArgs e) {
Console.WriteLine("MMOpenClick");
}
protected void MMCloseClick(object who, EventArgs e) {
Console.WriteLine("MMCloseClick");
}
protected void MMExitClick(object who, EventArgs e) {
Console.WriteLine("Exit");
}
}</source>
Add control to Form dynamically
<source lang="csharp">using System; using System.Drawing; using System.Windows.Forms;
public class MainForm : Form {
public static void Main()
{
MainForm MyForm = new MainForm();
Application.Run(MyForm);
}
public MainForm()
{
Button MyButton = new Button();
Text = "Button Test";
MyButton.Location = new Point(25, 25);
MyButton.Text = "Click Me";
MyButton.Click += new EventHandler(MyButtonClicked);
Controls.Add(MyButton);
}
public void MyButtonClicked(object sender, EventArgs Arguments)
{
MessageBox.Show("The button has been clicked.");
}
}</source>
Build Form without by hand
<source lang="csharp">using System; using System.Drawing; using System.Windows.Forms; class FormHand : Form {
private TextBox firstNameBox = new TextBox();
private Button btnShowControls = new Button();
public FormHand()
{
firstNameBox.Text = "Text";
firstNameBox.Size = new Size(150, 50);
firstNameBox.Location = new Point(10, 10);
this.Controls.Add(firstNameBox);
btnShowControls.Text = "Click Me";
btnShowControls.Size = new Size(90, 90);
btnShowControls.Location = new Point(10, 70);
btnShowControls.Click += new EventHandler(btnShowControls_Clicked);
this.Controls.Add(btnShowControls);
CenterToScreen();
}
protected void btnShowControls_Clicked(object sender, EventArgs e)
{
Control.ControlCollection coll = this.Controls;
foreach(Control c in coll)
{
if(c != null)
Console.WriteLine(string.Format("Index: {0}, Text: {1}\n", coll.GetChildIndex(c, false), c.Text));
}
MessageBox.Show("Message", "Index and Text values for each control");
}
public static int Main(string[] args)
{
Application.Run(new FormHand());
return 0;
}
}</source>
Call form constructor to create a Form object
<source lang="csharp">class NewForm {
public static void Main()
{
new System.Windows.Forms.Form();
}
}</source>
Cal Show method to display a form
<source lang="csharp">using System.Windows.Forms;
class ShowForm {
public static void Main()
{
Form form = new Form();
form.Show();
}
}</source>
Change Form Cursor
<source lang="csharp">using System; using System.Drawing; using System.Collections; using System.ruponentModel; using System.Windows.Forms; using System.Data; public class FormCursorSetting : System.Windows.Forms.Form {
private System.ruponentModel.Container components = null;
public FormCursorSetting()
{
InitializeComponent();
Cursor = Cursors.WaitCursor;
this.Paint += new System.Windows.Forms.PaintEventHandler(this.Form1_Paint);
}
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
private void InitializeComponent()
{
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(292, 273);
this.Text = "Form1";
}
[STAThread]
static void Main()
{
Application.Run(new FormCursorSetting());
}
private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
{
Graphics g = e.Graphics;
g.DrawString("String...", new Font("Times New Roman", 20), new SolidBrush(Color.Black), 40, 10);
}
}</source>
<source lang="csharp">using System; using System.Windows.Forms;
class FormChangeSize : Form {
MainMenu MyMenu;
public FormChangeSize() {
Text = "Adding a Main Menu";
MyMenu = new MainMenu();
MenuItem m1 = new MenuItem("File");
MyMenu.MenuItems.Add(m1);
MenuItem m2 = new MenuItem("Tools");
MyMenu.MenuItems.Add(m2);
MenuItem subm1 = new MenuItem("Open");
m1.MenuItems.Add(subm1);
MenuItem subm2 = new MenuItem("Close");
m1.MenuItems.Add(subm2);
MenuItem subm3 = new MenuItem("Exit");
m1.MenuItems.Add(subm3);
MenuItem subm4 = new MenuItem("Coordinates");
m2.MenuItems.Add(subm4);
MenuItem subm5 = new MenuItem("Change Size");
m2.MenuItems.Add(subm5);
MenuItem subm6 = new MenuItem("Restore");
m2.MenuItems.Add(subm6);
subm4.Click += MMCoordClick;
subm5.Click += MMChangeClick;
subm6.Click += MMRestoreClick;
Menu = MyMenu;
}
[STAThread]
public static void Main() {
FormChangeSize skel = new FormChangeSize();
Application.Run(skel);
}
protected void MMCoordClick(object who, EventArgs e) {
Console.WriteLine("Top:"+Top);
Console.WriteLine("Left:"+Left);
Console.WriteLine("Bottom:"+Bottom);
Console.WriteLine("Right:"+Right);
}
protected void MMChangeClick(object who, EventArgs e) {
Width = Height = 200;
}
protected void MMRestoreClick(object who, EventArgs e) {
Width = Height = 300;
}
}</source>
Form Dispose
<source lang="csharp">using System; using System.Drawing; using System.Collections; using System.ruponentModel; using System.Windows.Forms; using System.Data; public class FormDispose : System.Windows.Forms.Form {
private System.ruponentModel.Container components = null;
public FormDispose()
{
InitializeComponent();
}
protected override void Dispose( bool disposing )
{
MessageBox.Show("Disposing this Form");
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
private void InitializeComponent()
{
this.ruponents = new System.ruponentModel.Container();
this.Size = new System.Drawing.Size(300,300);
this.Text = "Form1";
}
[STAThread]
static void Main()
{
Application.Run(new FormDispose());
}
}</source>
Form message filter
<source lang="csharp">using System; using System.Windows.Forms; public class mainForm : System.Windows.Forms.Form {
private MyMessageFilter msgFliter = new MyMessageFilter();
public mainForm()
{
Application.ApplicationExit += new EventHandler(Form_OnExit);
Application.AddMessageFilter(msgFliter);
}
[STAThread]
static void Main()
{
Application.Run(new mainForm());
}
private void Form_OnExit(object sender, EventArgs evArgs)
{
Application.RemoveMessageFilter(msgFliter);
}
} public class MyMessageFilter : IMessageFilter {
public bool PreFilterMessage(ref Message m)
{
// Intercept the left mouse button down message.
if (m.Msg == 513)
{
Console.WriteLine("WM_LBUTTONDOWN is: " + m.Msg);
return true;
}
return false;
}
}</source>
Inherited Form
<source lang="csharp">using System; using System.Drawing; using System.Windows.Forms; public class BaseForm : System.Windows.Forms.Form {
private Button btnClose;
private Button btnApp;
protected Label lbl;
public BaseForm()
{
btnClose = new Button();
btnClose.Location = new Point(25,100);
btnClose.Size = new Size(100,25);
btnClose.Text = "&Close";
btnClose.Click += new System.EventHandler(btnClose_Click);
btnApp = new Button();
btnApp.Location = new Point(200,100);
btnApp.Size = new Size(150,25);
btnApp.Text = "&Base Application";
btnApp.Click += new System.EventHandler(btnApp_Click);
lbl = new Label();
lbl.Location = new Point(25,25);
lbl.Size = new Size(100,25);
lbl.Text = "This label on BaseForm";
Controls.AddRange(new Control[]{lbl, btnClose, btnApp});
}
static void Main()
{
Application.Run(new BaseForm());
}
private void btnClose_Click(object sender, EventArgs e)
{
Application.Exit();
}
private void btnApp_Click(object sender, EventArgs e)
{
MessageBox.Show("This is the Base application.");
SomeMethod();
}
protected virtual void SomeMethod()
{
MessageBox.Show("This is SomeMethod called from BaseForm.");
}
} public class InheritedForm : BaseForm {
private Button btn;
public InheritedForm()
{
btn = new Button();
btn.Location = new Point(25,150);
btn.Size = new Size(125,25);
btn.Text = "C&lose on Inherited";
btn.Click += new System.EventHandler(btn_Click);
Controls.Add(btn);
lbl.Text = "Now from InheritedForm";
BackColor = Color.LightBlue;
}
static void Main()
{
Application.Run(new InheritedForm());
}
private void btn_Click(object sender, EventArgs e)
{
Application.Exit();
}
protected override void SomeMethod()
{
MessageBox.Show("This is the overridden SomeMethod called " +
"from InheritedForm.");
}
}</source>
Inherit Form With Constructor
<source lang="csharp">using System; using System.Drawing; using System.Windows.Forms;
class InheritWithConstructor: Form {
public static void Main()
{
Application.Run(new InheritWithConstructor());
}
public InheritWithConstructor()
{
Text = "Inherit with Constructor";
BackColor = Color.White;
}
}</source>
Irregular form
<source lang="csharp">using System; using System.Drawing; using System.Windows.Forms; using System.Drawing.Drawing2D; public class IrregularForm : Form {
public IrregularForm()
{
this.cmdClose = new System.Windows.Forms.Button();
this.SuspendLayout();
this.cmdClose.Location = new System.Drawing.Point(94, 231);
this.cmdClose.Size = new System.Drawing.Size(75, 23);
this.cmdClose.Text = "Close";
this.cmdClose.UseVisualStyleBackColor = true;
this.cmdClose.Click += new System.EventHandler(this.cmdClose_Click);
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(295, 270);
this.Controls.Add(this.cmdClose);
this.Text = "Irregular Form";
this.Load += new System.EventHandler(this.IrregularForm_Load);
this.ResumeLayout(false);
}
private void IrregularForm_Load(object sender, EventArgs e)
{
GraphicsPath path = new GraphicsPath();
Point[] pointsA = new Point[]{new Point(0, 0),new Point(40, 60), new Point(this.Width - 100, 10)};
path.AddCurve(pointsA);
Point[] pointsB = new Point[]{
new Point(this.Width - 40, this.Height - 60),
new Point(this.Width, this.Height),
new Point(10, this.Height)
};
path.AddCurve(pointsB);
path.CloseAllFigures();
this.Region = new Region(path);
}
private void cmdClose_Click(object sender, EventArgs e)
{
this.Close();
}
private System.Windows.Forms.Button cmdClose;
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new IrregularForm());
}
}</source>
Move a Form in code
<source lang="csharp">using System; using System.Drawing; using System.Windows.Forms; public class FormMoveDemo : Form {
private bool dragging;
private Point pointClicked;
public FormMoveDemo()
{
InitializeComponent();
}
private void lblDrag_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
dragging = true;
pointClicked = new Point(e.X, e.Y);
}
else
{
dragging = false;
}
}
private void lblDrag_MouseMove(object sender, MouseEventArgs e)
{
if (dragging){
Point pointMoveTo;
pointMoveTo = this.PointToScreen(new Point(e.X, e.Y));
pointMoveTo.Offset(-pointClicked.X, -pointClicked.Y);
this.Location = pointMoveTo;
}
}
private void lblDrag_MouseUp(object sender, MouseEventArgs e)
{
dragging = false;
}
private void cmdClose_Click(object sender, EventArgs e)
{
this.Close();
}
[STAThread]
public static void Main(string[] args)
{
Application.Run(new FormMoveDemo());
}
private System.Windows.Forms.Button cmdClose= new System.Windows.Forms.Button();
private System.Windows.Forms.Label lblDrag = new System.Windows.Forms.Label();
private System.ruponentModel.IContainer components = null;
private void InitializeComponent()
{
this.SuspendLayout();
//
// cmdClose
//
this.cmdClose.Location = new System.Drawing.Point(102, 215);
this.cmdClose.Name = "cmdClose";
this.cmdClose.Size = new System.Drawing.Size(76, 20);
this.cmdClose.TabIndex = 5;
this.cmdClose.Text = "Close";
this.cmdClose.Click += new System.EventHandler(this.cmdClose_Click);
//
// lblDrag
//
this.lblDrag.BackColor = System.Drawing.Color.Navy;
this.lblDrag.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
this.lblDrag.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.lblDrag.ForeColor = System.Drawing.Color.White;
this.lblDrag.Location = new System.Drawing.Point(94, 167);
this.lblDrag.Name = "lblDrag";
this.lblDrag.Size = new System.Drawing.Size(96, 36);
this.lblDrag.TabIndex = 4;
this.lblDrag.Text = "Click here to move the form!";
this.lblDrag.MouseUp += new System.Windows.Forms.MouseEventHandler(this.lblDrag_MouseUp);
this.lblDrag.MouseMove += new System.Windows.Forms.MouseEventHandler(this.lblDrag_MouseMove);
this.lblDrag.MouseDown += new System.Windows.Forms.MouseEventHandler(this.lblDrag_MouseDown);
//
// FormMoveDemo
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(292, 266);
this.ControlBox = false;
this.Controls.Add(this.cmdClose);
this.Controls.Add(this.lblDrag);
this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
this.MaximizeBox = false;
this.MinimizeBox = false;
this.ResumeLayout(false);
}
}</source>
ResumeLayout and SuspendLayout
<source lang="csharp">using System; using System.Windows.Forms; class MainForm : Form {
private Label label1;
private TextBox textBox1;
private Button button1;
public MainForm()
{
this.label1 = new Label();
this.textBox1 = new TextBox();
this.button1 = new Button();
this.SuspendLayout();
this.label1.Location = new System.Drawing.Point(16, 36);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(128, 16);
this.label1.TabIndex = 0;
this.label1.Text = "Please enter your name:";
this.textBox1.Location = new System.Drawing.Point(152, 32);
this.textBox1.Name = "textBox1";
this.textBox1.TabIndex = 1;
this.textBox1.Text = "";
this.button1.Location = new System.Drawing.Point(109, 80);
this.button1.Name = "button1";
this.button1.TabIndex = 2;
this.button1.Text = "Enter";
this.button1.Click += new System.EventHandler(this.button1_Click);
this.ClientSize = new System.Drawing.Size(292, 126);
this.Controls.Add(this.button1);
this.Controls.Add(this.textBox1);
this.Controls.Add(this.label1);
this.Name = "form1";
this.Text = "Visual C#";
this.ResumeLayout(false);
}
private void button1_Click(object sender, System.EventArgs e)
{
System.Console.WriteLine("User entered: " + textBox1.Text);
MessageBox.Show("Welcome, " + textBox1.Text, "Visual C#");
}
[STAThread]
public static void Main()
{
Application.EnableVisualStyles();
Application.Run(new MainForm());
}
}</source>
Scroll Form
<source lang="csharp">using System; using System.Drawing; using System.Collections; using System.ruponentModel; using System.Windows.Forms; using System.Data; public class ScrollForm : System.Windows.Forms.Form {
private System.Windows.Forms.Label label1;
private System.ruponentModel.Container components = null;
public ScrollForm()
{
InitializeComponent();
}
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
private void InitializeComponent()
{
this.label1 = new System.Windows.Forms.Label();
this.SuspendLayout();
this.label1.Font = new System.Drawing.Font("Microsoft Sans Serif", 24F);
this.label1.Location = new System.Drawing.Point(16, 16);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(376, 224);
this.label1.TabIndex = 0;
this.label1.Text = "Scrollbars of course!";
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.AutoScroll = true;
this.AutoScrollMinSize = new System.Drawing.Size(300, 300);
this.ClientSize = new System.Drawing.Size(319, 136);
this.Controls.Add(this.label1);
this.Name = "ScrollForm";
this.Text = "ScrollForm";
this.ResumeLayout(false);
}
[STAThread]
static void Main()
{
Application.Run(new ScrollForm());
}
}</source>
Set Form Visible properties
<source lang="csharp">using System.Windows.Forms;
class RunFormBadly {
public static void Main()
{
Form form = new Form();
form.Text = "Not a Good Idea...";
form.Visible = true;
Application.Run();
}
}</source>
Subclass Form
<source lang="csharp">using System; using System.Drawing; using System.Windows.Forms;
class InheritTheForm: Form {
public static void Main()
{
InheritTheForm form = new InheritTheForm();
form.Text = "Inherit the Form";
form.BackColor = Color.White;
Application.Run(form);
}
}</source>
Text as the title
<source lang="csharp">using System.Threading; using System.Windows.Forms;
class ShowFormAndSleep {
public static void Main()
{
Form form = new Form();
form.Show();
Thread.Sleep(2500);
form.Text = "My First Form";
Thread.Sleep(2500);
}
}</source>
The difference between Form.Show and Application.Run()
<source lang="csharp">using System.Windows.Forms;
class TwoForms {
public static void Main()
{
Form form1 = new Form();
Form form2 = new Form();
form1.Text = "Form passed to Run()";
form2.Text = "Second form";
form2.Show();
Application.Run(form1);
MessageBox.Show("Application.Run() has returned control back to Main.","TwoForms");
}
}</source>
The Hello, WindowsForms Application
<source lang="csharp">using System.Windows.Forms;
public class SimpleHelloWorld : Form {
public static void Main()
{
Application.Run(new SimpleHelloWorld());
}
public SimpleHelloWorld()
{
Text = "Hello, WindowsForms!";
}
}</source>
Use Inherited form in a separate Main class
<source lang="csharp">using System; using System.Drawing; using System.Windows.Forms;
class SeparateMain {
public static void Main()
{
Application.Run(new AnotherHelloWorld());
}
} class AnotherHelloWorld: Form {
public AnotherHelloWorld()
{
Text = "Another Hello World";
BackColor = Color.White;
}
protected override void OnPaint(PaintEventArgs pea)
{
Graphics graphics = pea.Graphics;
graphics.DrawString("Hello, Windows Forms!", Font,
Brushes.Black, 0, 0);
}
}</source>
