Csharp/CSharp Tutorial/GUI Windows Forms/Form Event
Содержание
- 1 All form events
- 2 Cancel Form Closing event
- 3 Form Key event
- 4 Form life time event: Closing, Load, Closed, Activated, Deactivate
- 5 Form mouse move event
- 6 Form Mouse Up event
- 7 Form size changed event handler
- 8 Paint event
- 9 Paint one forms with two paint event handler
- 10 Paint two forms with one paint event handler
- 11 React to form resize event
All form events
<source lang="csharp">using System; using System.Collections.Generic; using System.ruponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; public partial class Form1 : Form {
public Form1()
{
InitializeComponent();
}
private void Form1_Activated(object sender, EventArgs e)
{
Console.WriteLine("Activated");
}
private void Form1_AutoSizeChanged(object sender, EventArgs e)
{
Console.WriteLine("Autosizechanged");
}
private void Form1_AutoValidateChanged(object sender, EventArgs e)
{
Console.WriteLine("AutoValidateChanged");
}
private void Form1_BackColorChanged(object sender, EventArgs e)
{
Console.WriteLine("BackColorChanged");
}
private void Form1_BackgroundImageChanged(object sender, EventArgs e)
{
Console.WriteLine("BackgroundImageChanged");
}
private void Form1_BackgroundImageLayoutChanged(object sender, EventArgs e)
{
Console.WriteLine("BackgroundImageLayoutChanged");
}
private void Form1_BindingContextChanged(object sender, EventArgs e)
{
Console.WriteLine("BindingContextChanged");
}
private void Form1_CausesValidationChanged(object sender, EventArgs e)
{
Console.WriteLine("CausesValidationChanged");
}
private void Form1_ChangeUICues(object sender, UICuesEventArgs e)
{
Console.WriteLine("ChangeUICues");
}
private void Form1_Click(object sender, EventArgs e)
{
Console.WriteLine("Click");
}
private void Form1_ContextMenuStripChanged(object sender, EventArgs e)
{
Console.WriteLine("ContextMenuStripChanged");
}
private void Form1_ControlAdded(object sender, ControlEventArgs e)
{
Console.WriteLine("ControlAdded");
}
private void Form1_ControlRemoved(object sender, ControlEventArgs e)
{
Console.WriteLine("ControlRemoved");
}
private void Form1_CursorChanged(object sender, EventArgs e)
{
Console.WriteLine("CursorChanged");
}
private void Form1_Deactivate(object sender, EventArgs e)
{
Console.WriteLine("Deactivate");
}
private void Form1_DockChanged(object sender, EventArgs e)
{
Console.WriteLine("DockChanged");
}
private void Form1_DoubleClick(object sender, EventArgs e)
{
Console.WriteLine("DoubleClick");
}
private void Form1_DragDrop(object sender, DragEventArgs e)
{
Console.WriteLine("DragDrop");
}
private void Form1_DragEnter(object sender, DragEventArgs e)
{
Console.WriteLine("DragEnter");
}
private void Form1_DragLeave(object sender, EventArgs e)
{
Console.WriteLine("DragLeave");
}
private void Form1_DragOver(object sender, DragEventArgs e)
{
Console.WriteLine("DragOver");
}
private void Form1_EnabledChanged(object sender, EventArgs e)
{
Console.WriteLine("EnabledChanged");
}
private void Form1_Enter(object sender, EventArgs e)
{
Console.WriteLine("Enter");
}
private void Form1_FontChanged(object sender, EventArgs e)
{
Console.WriteLine("FontChanged");
}
private void Form1_ForeColorChanged(object sender, EventArgs e)
{
Console.WriteLine("ForeColorChanged");
}
private void Form1_FormClosed(object sender, FormClosedEventArgs e)
{
Console.WriteLine("FormClosed");
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
Console.WriteLine("FormClosing");
}
private void Form1_GiveFeedback(object sender, GiveFeedbackEventArgs e)
{
Console.WriteLine("GiveFeedback");
}
private void Form1_HelpButtonClicked(object sender, CancelEventArgs e)
{
Console.WriteLine("HelpButtonClicked");
}
private void Form1_HelpRequested(object sender, HelpEventArgs hlpevent)
{
Console.WriteLine("HelpRequested");
}
private void Form1_ImeModeChanged(object sender, EventArgs e)
{
Console.WriteLine("ImeModeChanged");
}
private void Form1_InputLanguageChanged(object sender, InputLanguageChangedEventArgs e)
{
Console.WriteLine("InputLanguageChanged");
}
private void Form1_InputLanguageChanging(object sender, InputLanguageChangingEventArgs e)
{
Console.WriteLine("InputLanguageChanging");
}
private void Form1_KeyDown(object sender, KeyEventArgs e)
{
Console.WriteLine("KeyDown");
}
private void Form1_KeyPress(object sender, KeyPressEventArgs e)
{
Console.WriteLine("KeyPress");
}
private void Form1_KeyUp(object sender, KeyEventArgs e)
{
Console.WriteLine("KeyUp");
}
private void Form1_Layout(object sender, LayoutEventArgs e)
{
Console.WriteLine("Layout");
}
private void Form1_Leave(object sender, EventArgs e)
{
Console.WriteLine("Leave");
}
private void Form1_Load(object sender, EventArgs e)
{
Console.WriteLine("Load");
}
private void Form1_LocationChanged(object sender, EventArgs e)
{
Console.WriteLine("LocationChanged");
}
private void Form1_MarginChanged(object sender, EventArgs e)
{
Console.WriteLine("MarginChanged");
}
private void Form1_MaximizedBoundsChanged(object sender, EventArgs e)
{
Console.WriteLine("MaximizedBoundsChanged");
}
private void Form1_MaximumSizeChanged(object sender, EventArgs e)
{
Console.WriteLine("MAximumSizeChanged");
}
private void Form1_MdiChildActivate(object sender, EventArgs e)
{
Console.WriteLine("MdiChildActivate");
}
private void Form1_MenuComplete(object sender, EventArgs e)
{
Console.WriteLine("MenuComplete");
}
private void Form1_MenuStart(object sender, EventArgs e)
{
Console.WriteLine("MenuStart");
}
private void Form1_MinimumSizeChanged(object sender, EventArgs e)
{
Console.WriteLine("MinimumSizeChanged");
}
private void Form1_MouseCaptureChanged(object sender, EventArgs e)
{
Console.WriteLine("MouseCaptureChanged");
}
private void Form1_MouseClick(object sender, MouseEventArgs e)
{
Console.WriteLine("MouseClick");
}
private void Form1_MouseDoubleClick(object sender, MouseEventArgs e)
{
Console.WriteLine("MouseDoubleClick");
}
private void Form1_MouseDown(object sender, MouseEventArgs e)
{
Console.WriteLine("MouseDown");
}
private void Form1_MouseEnter(object sender, EventArgs e)
{
Console.WriteLine("MouseEnter");
}
private void Form1_MouseHover(object sender, EventArgs e)
{
Console.WriteLine("MouseHover");
}
private void Form1_MouseLeave(object sender, EventArgs e)
{
Console.WriteLine("MouseLeave");
}
private void Form1_MouseMove(object sender, MouseEventArgs e)
{
Console.WriteLine("MouseMove");
}
private void Form1_MouseUp(object sender, MouseEventArgs e)
{
Console.WriteLine("MouseUp");
}
private void Form1_Move(object sender, EventArgs e)
{
Console.WriteLine("Move");
}
private void Form1_PaddingChanged(object sender, EventArgs e)
{
Console.WriteLine("PaddingChanged");
}
private void Form1_Paint(object sender, PaintEventArgs e)
{
Console.WriteLine("Paint");
}
private void Form1_ParentChanged(object sender, EventArgs e)
{
Console.WriteLine("ParentChanged");
}
private void Form1_QueryAccessibilityHelp(object sender, QueryAccessibilityHelpEventArgs e)
{
Console.WriteLine("QueryAccessibilityHelp");
}
private void Form1_QueryContinueDrag(object sender, QueryContinueDragEventArgs e)
{
Console.WriteLine("QueryContinueDrag");
}
private void Form1_RegionChanged(object sender, EventArgs e)
{
Console.WriteLine("RegionChanged");
}
private void Form1_Resize(object sender, EventArgs e)
{
Console.WriteLine("Resize");
}
private void Form1_ResizeBegin(object sender, EventArgs e)
{
Console.WriteLine("ResizeBegin");
}
private void Form1_ResizeEnd(object sender, EventArgs e)
{
Console.WriteLine("ResizeEnd");
}
private void Form1_RightToLeftChanged(object sender, EventArgs e)
{
Console.WriteLine("RightToLeftChanged");
}
private void Form1_RightToLeftLayoutChanged(object sender, EventArgs e)
{
Console.WriteLine("RightToLeftLayoutChanged");
}
private void Form1_Scroll(object sender, ScrollEventArgs e)
{
Console.WriteLine("Scroll");
}
private void Form1_Shown(object sender, EventArgs e)
{
Console.WriteLine("Shown");
}
private void Form1_SizeChanged(object sender, EventArgs e)
{
Console.WriteLine("SizeChanged");
}
private void Form1_StyleChanged(object sender, EventArgs e)
{
Console.WriteLine("StyleChanged");
}
private void Form1_SystemColorsChanged(object sender, EventArgs e)
{
Console.WriteLine("SystemColorsChanged");
}
private void Form1_TextChanged(object sender, EventArgs e)
{
Console.WriteLine("TextChanged");
}
private void Form1_Validated(object sender, EventArgs e)
{
Console.WriteLine("Validated");
}
private void Form1_Validating(object sender, CancelEventArgs e)
{
Console.WriteLine("Validating");
}
private void Form1_VisibleChanged(object sender, EventArgs e)
{
Console.WriteLine("VisibleChanged");
}
} partial class Form1 {
private void InitializeComponent()
{
this.button1 = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(87, 79);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(75, 23);
this.button1.TabIndex = 0;
this.button1.Text = "button1";
//
// 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.button1);
this.Name = "Form1";
this.Text = "Form1";
this.CursorChanged += new System.EventHandler(this.Form1_CursorChanged);
this.RightToLeftLayoutChanged += new System.EventHandler(this.Form1_RightToLeftLayoutChanged);
this.QueryContinueDrag += new System.Windows.Forms.QueryContinueDragEventHandler(this.Form1_QueryContinueDrag);
this.Deactivate += new System.EventHandler(this.Form1_Deactivate);
this.Load += new System.EventHandler(this.Form1_Load);
this.BackgroundImageLayoutChanged += new System.EventHandler(this.Form1_BackgroundImageLayoutChanged);
this.RightToLeftChanged += new System.EventHandler(this.Form1_RightToLeftChanged);
this.DragLeave += new System.EventHandler(this.Form1_DragLeave);
this.InputLanguageChanged += new System.Windows.Forms.InputLanguageChangedEventHandler(this.Form1_InputLanguageChanged);
this.Validating += new System.ruponentModel.CancelEventHandler(this.Form1_Validating);
this.BackgroundImageChanged += new System.EventHandler(this.Form1_BackgroundImageChanged);
this.MouseDoubleClick += new System.Windows.Forms.MouseEventHandler(this.Form1_MouseDoubleClick);
this.DragEnter += new System.Windows.Forms.DragEventHandler(this.Form1_DragEnter);
this.ControlAdded += new System.Windows.Forms.ControlEventHandler(this.Form1_ControlAdded);
this.FontChanged += new System.EventHandler(this.Form1_FontChanged);
this.MaximizedBoundsChanged += new System.EventHandler(this.Form1_MaximizedBoundsChanged);
this.AutoSizeChanged += new System.EventHandler(this.Form1_AutoSizeChanged);
this.Paint += new System.Windows.Forms.PaintEventHandler(this.Form1_Paint);
this.VisibleChanged += new System.EventHandler(this.Form1_VisibleChanged);
this.BindingContextChanged += new System.EventHandler(this.Form1_BindingContextChanged);
this.HelpButtonClicked += new System.ruponentModel.CancelEventHandler(this.Form1_HelpButtonClicked);
this.EnabledChanged += new System.EventHandler(this.Form1_EnabledChanged);
this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.Form1_MouseDown);
this.ContextMenuStripChanged += new System.EventHandler(this.Form1_ContextMenuStripChanged);
this.Scroll += new System.Windows.Forms.ScrollEventHandler(this.Form1_Scroll);
this.MouseLeave += new System.EventHandler(this.Form1_MouseLeave);
this.MouseClick += new System.Windows.Forms.MouseEventHandler(this.Form1_MouseClick);
this.Validated += new System.EventHandler(this.Form1_Validated);
this.ParentChanged += new System.EventHandler(this.Form1_ParentChanged);
this.Resize += new System.EventHandler(this.Form1_Resize);
this.ControlRemoved += new System.Windows.Forms.ControlEventHandler(this.Form1_ControlRemoved);
this.Shown += new System.EventHandler(this.Form1_Shown);
this.AutoValidateChanged += new System.EventHandler(this.Form1_AutoValidateChanged);
this.SizeChanged += new System.EventHandler(this.Form1_SizeChanged);
this.DoubleClick += new System.EventHandler(this.Form1_DoubleClick);
this.Activated += new System.EventHandler(this.Form1_Activated);
this.Enter += new System.EventHandler(this.Form1_Enter);
this.Layout += new System.Windows.Forms.LayoutEventHandler(this.Form1_Layout);
this.MouseUp += new System.Windows.Forms.MouseEventHandler(this.Form1_MouseUp);
this.StyleChanged += new System.EventHandler(this.Form1_StyleChanged);
this.ForeColorChanged += new System.EventHandler(this.Form1_ForeColorChanged);
this.DragDrop += new System.Windows.Forms.DragEventHandler(this.Form1_DragDrop);
this.MouseEnter += new System.EventHandler(this.Form1_MouseEnter);
this.MdiChildActivate += new System.EventHandler(this.Form1_MdiChildActivate);
this.Leave += new System.EventHandler(this.Form1_Leave);
this.MouseMove += new System.Windows.Forms.MouseEventHandler(this.Form1_MouseMove);
this.MinimumSizeChanged += new System.EventHandler(this.Form1_MinimumSizeChanged);
this.Move += new System.EventHandler(this.Form1_Move);
this.MouseCaptureChanged += new System.EventHandler(this.Form1_MouseCaptureChanged);
this.FormClosed += new System.Windows.Forms.FormClosedEventHandler(this.Form1_FormClosed);
this.PaddingChanged += new System.EventHandler(this.Form1_PaddingChanged);
this.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.Form1_KeyPress);
this.ChangeUICues += new System.Windows.Forms.UICuesEventHandler(this.Form1_ChangeUICues);
this.DockChanged += new System.EventHandler(this.Form1_DockChanged);
this.GiveFeedback += new System.Windows.Forms.GiveFeedbackEventHandler(this.Form1_GiveFeedback);
this.ImeModeChanged += new System.EventHandler(this.Form1_ImeModeChanged);
this.Click += new System.EventHandler(this.Form1_Click);
this.SystemColorsChanged += new System.EventHandler(this.Form1_SystemColorsChanged);
this.QueryAccessibilityHelp += new System.Windows.Forms.QueryAccessibilityHelpEventHandler(this.Form1_QueryAccessibilityHelp);
this.FormClosing += new System.Windows.Forms.FormClosingEventHandler(this.Form1_FormClosing);
this.RegionChanged += new System.EventHandler(this.Form1_RegionChanged);
this.KeyUp += new System.Windows.Forms.KeyEventHandler(this.Form1_KeyUp);
this.MarginChanged += new System.EventHandler(this.Form1_MarginChanged);
this.TextChanged += new System.EventHandler(this.Form1_TextChanged);
this.ResizeBegin += new System.EventHandler(this.Form1_ResizeBegin);
this.HelpRequested += new System.Windows.Forms.HelpEventHandler(this.Form1_HelpRequested);
this.LocationChanged += new System.EventHandler(this.Form1_LocationChanged);
this.KeyDown += new System.Windows.Forms.KeyEventHandler(this.Form1_KeyDown);
this.BackColorChanged += new System.EventHandler(this.Form1_BackColorChanged);
this.InputLanguageChanging += new System.Windows.Forms.InputLanguageChangingEventHandler(this.Form1_InputLanguageChanging);
this.MenuStart += new System.EventHandler(this.Form1_MenuStart);
this.MouseHover += new System.EventHandler(this.Form1_MouseHover);
this.ResizeEnd += new System.EventHandler(this.Form1_ResizeEnd);
this.DragOver += new System.Windows.Forms.DragEventHandler(this.Form1_DragOver);
this.CausesValidationChanged += new System.EventHandler(this.Form1_CausesValidationChanged);
this.MenuComplete += new System.EventHandler(this.Form1_MenuComplete);
this.MaximumSizeChanged += new System.EventHandler(this.Form1_MaximumSizeChanged);
this.ResumeLayout(false);
}
private System.Windows.Forms.Button button1;
} public class FormEventAll {
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.Run(new Form1());
MessageBox.Show("Click OK to finish");
}
}</source>
Cancel Form Closing event
<source lang="csharp">using System; using System.Drawing; using System.Collections; using System.ruponentModel; using System.Windows.Forms; using System.Data; public class FormClosingEventCancle : System.Windows.Forms.Form {
private System.ruponentModel.Container components = null;
public FormClosingEventCancle()
{
InitializeComponent();
this.Closing += new System.ruponentModel.CancelEventHandler(this.FormClosingEventCancle_Closing);
}
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(280, 177);
}
[STAThread]
static void Main()
{
Application.Run(new FormClosingEventCancle());
}
private void FormClosingEventCancle_Closing(object sender, System.ruponentModel.CancelEventArgs e)
{
DialogResult dr = MessageBox.Show("Do you REALLY want to close this app?",
"Closing event!", MessageBoxButtons.YesNo);
if(dr == DialogResult.No)
e.Cancel = true;
else
e.Cancel = false;
}
}</source>
Form Key event
<source lang="csharp">using System; using System.Drawing; using System.Collections; using System.ruponentModel; using System.Windows.Forms; using System.Data; public class FormMouseKeyEvent : System.Windows.Forms.Form {
private System.ruponentModel.Container components = null;
public FormMouseKeyEvent()
{
this.KeyUp += new KeyEventHandler(OnKeyUp);
InitializeComponent();
CenterToScreen();
}
protected override void Dispose( bool disposing )
{
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 FormMouseKeyEvent());
}
public void OnKeyUp(object sender, KeyEventArgs e)
{
MessageBox.Show(e.KeyCode.ToString(), "Key Pressed!");
}
}</source>
Form life time event: Closing, Load, Closed, Activated, Deactivate
<source lang="csharp">using System; using System.Drawing; using System.Collections; using System.ruponentModel; using System.Windows.Forms; using System.Data; public class FormLifeTimeEvent : System.Windows.Forms.Form {
private System.ruponentModel.Container components = null;
public FormLifeTimeEvent()
{
InitializeComponent();
this.Closing += new System.ruponentModel.CancelEventHandler(this.FormLifeTimeEvent_Closing);
this.Load += new System.EventHandler(this.FormLifeTimeEvent_Load);
this.Closed += new System.EventHandler(this.FormLifeTimeEvent_Closed);
this.Activated += new System.EventHandler(this.FormLifeTimeEvent_Activated);
this.Deactivate += new System.EventHandler(this.FormLifeTimeEvent_Deactivate);
}
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(280, 177);
}
[STAThread]
static void Main()
{
Application.Run(new FormLifeTimeEvent());
}
private void FormLifeTimeEvent_Closing(object sender, System.ruponentModel.CancelEventArgs e)
{
Console.WriteLine("Closing event");
}
private void FormLifeTimeEvent_Load(object sender, System.EventArgs e) {
Console.WriteLine("Load event");
}
private void FormLifeTimeEvent_Activated(object sender, System.EventArgs e) {
Console.WriteLine("Activate event");
}
private void FormLifeTimeEvent_Deactivate(object sender, System.EventArgs e) {
Console.WriteLine("Deactivate event");
}
private void FormLifeTimeEvent_Closed(object sender, System.EventArgs e) {
Console.WriteLine("Closed event");
}
}</source>
Form mouse move event
<source lang="csharp">using System; using System.Drawing; using System.Collections; using System.ruponentModel; using System.Windows.Forms; using System.Data; public class FormMouseMoveEvent : System.Windows.Forms.Form {
private System.ruponentModel.Container components = null;
public FormMouseMoveEvent()
{
this.MouseMove += new MouseEventHandler(OnMouseMove);
InitializeComponent();
}
protected override void Dispose( bool disposing )
{
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 FormMouseMoveEvent());
}
protected void OnMouseMove(object sender, MouseEventArgs e)
{
this.Text = "Current Pos: (" + e.X + ", " + e.Y + ")";
}
}</source>
Form Mouse Up event
<source lang="csharp">using System; using System.Drawing; using System.Collections; using System.ruponentModel; using System.Windows.Forms; using System.Data; public class FormMouseUpEvent : System.Windows.Forms.Form {
private System.ruponentModel.Container components = null;
public FormMouseUpEvent()
{
this.MouseUp += new MouseEventHandler(OnMouseUp);
InitializeComponent();
}
protected override void Dispose( bool disposing )
{
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 FormMouseUpEvent());
}
protected void OnMouseUp(object sender, MouseEventArgs e)
{
// Which mouse button was clicked?
if(e.Button == MouseButtons.Left)
MessageBox.Show("Left click!");
if(e.Button == MouseButtons.Right)
MessageBox.Show("Right click!");
if(e.Button == MouseButtons.Middle)
MessageBox.Show("Middle click!");
}
}</source>
Form size changed event handler
<source lang="csharp">using System; using System.Drawing; using System.Windows.Forms; public class ControlDynamicSizeLocation : Form {
private Button btnShow = new Button();
private Label lbl = new Label();
int xButtonSize, yButtonSize;
public ControlDynamicSizeLocation()
{
btnShow.Parent = this;
btnShow.Text = "Show Button Properties";
Size = new Size(400,400);
xButtonSize = (int)(Font.Height * .75) * btnShow.Text.Length;
yButtonSize = Font.Height * 2;
btnShow.Size = new Size(xButtonSize, yButtonSize);
btnShow.Click += new System.EventHandler(btnShow_Click);
lbl.Text = "Control Size and Location - Dynamic";
lbl.AutoSize = true;
lbl.Parent = this;
OnResize(EventArgs.Empty);
}
protected override void OnResize(EventArgs e)
{
base.OnResize(e);
int xPosition = (int)(this.ClientSize.Width / 2) - (int)(xButtonSize / 2);
int yPosition = (int)(this.ClientSize.Height / 2) - (int)(yButtonSize / 2);
btnShow.Location = new Point(xPosition, yPosition);
}
static void Main()
{
Application.Run(new ControlDynamicSizeLocation());
}
private void btnShow_Click(object sender, EventArgs e)
{
Console.WriteLine("Button Bottom:" + btnShow.Bottom.ToString());
Console.WriteLine("Button Top:" + btnShow.Top.ToString() );
Console.WriteLine("Button Left:" + btnShow.Left.ToString() );
Console.WriteLine("Button Right:" + btnShow.Right.ToString() );
Console.WriteLine("Button Location:" + btnShow.Location.ToString() );
Console.WriteLine("Button Width:" + btnShow.Width.ToString() );
Console.WriteLine("Button Height:" + btnShow.Height.ToString() );
Console.WriteLine("Button Size:" + btnShow.Size.ToString() );
Console.WriteLine("Button ClientSize:" + btnShow.ClientSize.ToString() );
Console.WriteLine("Font:" + btnShow.Font.ToString());
}
}</source>
Paint event
<source lang="csharp">using System; using System.Drawing; using System.Collections; using System.ruponentModel; using System.Windows.Forms; using System.Data; public class PaintForm : System.Windows.Forms.Form {
private System.ruponentModel.Container components;
public PaintForm()
{
InitializeComponent();
}
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 = "DataGridExample";
this.Resize += new System.EventHandler(this.PaintForm_Resize);
this.Paint += new System.Windows.Forms.PaintEventHandler(this.PaintForm_Paint);
}
[STAThread]
static void Main()
{
Application.Run(new PaintForm());
}
private void PaintForm_Resize(object sender, System.EventArgs e)
{
Invalidate();
Console.WriteLine("Resize");
}
private void PaintForm_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
{
Graphics g = e.Graphics;
g.DrawString("Text",
new Font("Times New Roman", 20),
new SolidBrush(Color.Black),
this.DisplayRectangle);
}
}</source>
Paint one forms with two paint event handler
<source lang="csharp">using System; using System.Drawing; using System.Windows.Forms;
class TwoPaintHandlers {
public static void Main()
{
Form form = new Form();
form.Text = "Two Paint Handlers";
form.BackColor = Color.White;
form.Paint += new PaintEventHandler(PaintHandler1);
form.Paint += new PaintEventHandler(PaintHandler2);
Application.Run(form);
}
static void PaintHandler1(object objSender, PaintEventArgs pea)
{
Form form = (Form)objSender;
Graphics graphics = pea.Graphics;
graphics.DrawString("First Paint Event Handler", form.Font,
Brushes.Black, 0, 0);
}
static void PaintHandler2(object objSender, PaintEventArgs pea)
{
Form form = (Form)objSender;
Graphics graphics = pea.Graphics;
graphics.DrawString("Second Paint Event Handler", form.Font,
Brushes.Black, 0, 100);
}
}</source>
Paint two forms with one paint event handler
<source lang="csharp">using System; using System.Drawing; using System.Windows.Forms;
class PaintTwoForms {
static Form form1, form2;
public static void Main()
{
form1 = new Form();
form2 = new Form();
form1.Text = "First Form";
form1.BackColor = Color.White;
form1.Paint += new PaintEventHandler(MyPaintHandler);
form2.Text = "Second Form";
form2.BackColor = Color.White;
form2.Paint += new PaintEventHandler(MyPaintHandler);
form2.Show();
Application.Run(form1);
}
static void MyPaintHandler(object objSender, PaintEventArgs pea)
{
Form form = (Form)objSender;
Graphics graphics = pea.Graphics;
string str;
if(form == form1)
str = "Hello from the first form";
else
str = "Hello from the second form";
graphics.DrawString(str, form.Font, Brushes.Black, 0, 0);
}
}</source>
React to form resize event
<source lang="csharp">using System; using System.Drawing; using System.Collections; using System.ruponentModel; using System.Windows.Forms; using System.Data; public class ResizeForm : System.Windows.Forms.Form {
private System.ruponentModel.Container components;
public ResizeForm()
{
InitializeComponent();
}
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.Resize += new System.EventHandler(this.ResizeForm_Resize);
}
[STAThread]
static void Main()
{
Application.Run(new ResizeForm());
}
private void ResizeForm_Resize(object sender, System.EventArgs e)
{
Invalidate();
Console.WriteLine("Resize");
}
}</source>
