Control.PerformLayout Methode
Definition
Wichtig
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Erzwingt die Anwendung von Layoutlogik auf untergeordnete Steuerelemente durch das Steuerelement.
Überlädt
| PerformLayout(Control, String) |
Erzwingt die Anwendung von Layoutlogik durch das Steuerelement auf sämtliche diesem untergeordneten Steuerelemente. |
| PerformLayout() |
Erzwingt die Anwendung von Layoutlogik durch das Steuerelement auf sämtliche diesem untergeordneten Steuerelemente. |
PerformLayout(Control, String)
Erzwingt die Anwendung von Layoutlogik durch das Steuerelement auf sämtliche diesem untergeordneten Steuerelemente.
public:
void PerformLayout(System::Windows::Forms::Control ^ affectedControl, System::String ^ affectedProperty);public void PerformLayout (System.Windows.Forms.Control affectedControl, string affectedProperty);public void PerformLayout (System.Windows.Forms.Control? affectedControl, string? affectedProperty);member this.PerformLayout : System.Windows.Forms.Control * string -> unitPublic Sub PerformLayout (affectedControl As Control, affectedProperty As String)Parameter
- affectedProperty
- String
Der Name der zuletzt geänderten Eigenschaft des Steuerelements.
Beispiele
Das folgende Codebeispiel zeigt, wie Sie die PerformLayout-Methode verwenden. Außerdem wird veranschaulicht, wie das Layout Ereignis ausgelöst wird. In diesem Beispiel ruft der Click Ereignishandler für Button1 explizit auf PerformLayout. Der Click Ereignishandler für Button2 ruft implizit auf PerformLayout. PerformLayout wird auch aufgerufen, wenn das Formular geladen wird. Button3 gibt das Steuerelement in den Zustand zurück, in dem es sich beim Laden befand. In jedem Fall wird das Layout Ereignis ausgelöst.
Dies ist ein vollständiges Beispiel. Fügen Sie zum Ausführen des Beispiels den folgenden Code in eine leere Form ein.
using namespace System;
using namespace System::Windows::Forms;
using namespace System::Drawing;
// This custom control has the Layout event implented so that when
// PerformLayout(AffectedControl, AffectedProperty) is called
// on the control, where AffectedProperty equals "Bounds" the
// textbox is centered on the control.
public ref class LayoutControl: public System::Windows::Forms::UserControl
{
public private:
System::Windows::Forms::TextBox^ TextBox1;
public:
LayoutControl()
: UserControl()
{
InitializeComponent();
}
private:
void InitializeComponent()
{
this->TextBox1 = gcnew System::Windows::Forms::TextBox;
this->SuspendLayout();
this->TextBox1->BorderStyle = System::Windows::Forms::BorderStyle::FixedSingle;
this->TextBox1->Name = "TextBox1";
this->TextBox1->TabIndex = 0;
this->BackColor = System::Drawing::SystemColors::ControlDark;
this->Controls->Add( this->TextBox1 );
this->Name = "LayoutControl";
this->ResumeLayout( false );
this->Layout += gcnew LayoutEventHandler( this, &LayoutControl::LayoutControl_Layout );
}
// This method is called when the Layout event is fired.
// This happens by during the initial load, by calling PerformLayout
// or by resizing, adding or removing controls or other actions that
// affect how the control is laid out. This method checks the
// value of e.AffectedProperty and changes the look of the
// control accordingly.
void LayoutControl_Layout( Object^ /*sender*/, System::Windows::Forms::LayoutEventArgs^ e )
{
if ( e->AffectedProperty != nullptr )
{
if ( e->AffectedProperty->Equals( "Bounds" ) )
{
TextBox1->Left = (this->Width - TextBox1->Width) / 2;
TextBox1->Top = (this->Height - TextBox1->Height) / 2;
}
}
else
{
this->Size = System::Drawing::Size( 150, 160 );
TextBox1->Location = System::Drawing::Point( 16, 24 );
}
TextBox1->Text = String::Format( "Left = {0} Top = {1}", TextBox1->Left, TextBox1->Top );
}
};
public ref class LayoutForm: public System::Windows::Forms::Form
{
public:
LayoutForm()
: Form()
{
InitializeComponent();
}
public private:
System::Windows::Forms::Button^ Button1;
System::Windows::Forms::Button^ Button2;
LayoutControl^ LayoutControl1;
System::Windows::Forms::Button^ Button3;
private:
void InitializeComponent()
{
this->Button1 = gcnew System::Windows::Forms::Button;
this->Button2 = gcnew System::Windows::Forms::Button;
this->Button3 = gcnew System::Windows::Forms::Button;
this->LayoutControl1 = gcnew LayoutControl;
this->SuspendLayout();
this->Button1->Location = System::Drawing::Point( 16, 16 );
this->Button1->Name = "Button1";
this->Button1->Size = System::Drawing::Size( 120, 32 );
this->Button1->TabIndex = 0;
this->Button1->Text = "Center textbox on control";
this->Button2->Location = System::Drawing::Point( 152, 16 );
this->Button2->Name = "Button2";
this->Button2->Size = System::Drawing::Size( 104, 32 );
this->Button2->TabIndex = 3;
this->Button2->Text = "Shrink user control";
this->Button3->Location = System::Drawing::Point( 96, 232 );
this->Button3->Name = "Button3";
this->Button3->TabIndex = 5;
this->Button3->Text = "Reset";
this->LayoutControl1->BackColor = System::Drawing::SystemColors::ControlDark;
this->LayoutControl1->Location = System::Drawing::Point( 72, 64 );
this->LayoutControl1->Name = "LayoutControl1";
this->LayoutControl1->Size = System::Drawing::Size( 150, 160 );
this->LayoutControl1->TabIndex = 6;
this->ClientSize = System::Drawing::Size( 292, 266 );
this->Controls->Add( this->Button3 );
this->Controls->Add( this->Button2 );
this->Controls->Add( this->Button1 );
this->Controls->Add( this->LayoutControl1 );
this->Name = "Form1";
this->Text = "Form1";
this->ResumeLayout( false );
this->Button1->Click += gcnew System::EventHandler( this,&LayoutForm::Button1_Click );
this->Button2->Click += gcnew System::EventHandler( this,&LayoutForm::Button2_Click );
this->Button3->Click += gcnew System::EventHandler( this,&LayoutForm::Button3_Click );
}
// This method explicitly calls raises the layout event on
// LayoutControl1, changing the Bounds property.
void Button1_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
LayoutControl1->PerformLayout( LayoutControl1, "Bounds" );
}
// This resize of LayoutControl1 implicitly triggers the layout event.
// Changing the size of the control affects its Bounds property.
void Button2_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
LayoutControl1->Size = System::Drawing::Size( 100, 100 );
}
// This method explicitly calls PerformLayout with no parameters,
// which raises the Layout event with the LayoutEventArgs properties
// equal to Nothing.
void Button3_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
LayoutControl1->PerformLayout();
}
};
[System::STAThread]
int main()
{
Application::Run( gcnew LayoutForm );
}
using System.Windows.Forms;
using System.Drawing;
public class LayoutForm:
System.Windows.Forms.Form
{
public LayoutForm() : base()
{
InitializeComponent();
}
internal System.Windows.Forms.Button Button1;
internal System.Windows.Forms.Button Button2;
internal LayoutControl LayoutControl1;
internal System.Windows.Forms.Button Button3;
private void InitializeComponent()
{
this.Button1 = new System.Windows.Forms.Button();
this.Button2 = new System.Windows.Forms.Button();
this.Button3 = new System.Windows.Forms.Button();
this.LayoutControl1 = new LayoutControl();
this.SuspendLayout();
this.Button1.Location = new System.Drawing.Point(16, 16);
this.Button1.Name = "Button1";
this.Button1.Size = new System.Drawing.Size(120, 32);
this.Button1.TabIndex = 0;
this.Button1.Text = "Center textbox on control";
this.Button2.Location = new System.Drawing.Point(152, 16);
this.Button2.Name = "Button2";
this.Button2.Size = new System.Drawing.Size(104, 32);
this.Button2.TabIndex = 3;
this.Button2.Text = "Shrink user control";
this.Button3.Location = new System.Drawing.Point(96, 232);
this.Button3.Name = "Button3";
this.Button3.TabIndex = 5;
this.Button3.Text = "Reset";
this.LayoutControl1.BackColor = System.Drawing.SystemColors.ControlDark;
this.LayoutControl1.Location = new System.Drawing.Point(72, 64);
this.LayoutControl1.Name = "LayoutControl1";
this.LayoutControl1.Size = new System.Drawing.Size(150, 160);
this.LayoutControl1.TabIndex = 6;
this.ClientSize = new System.Drawing.Size(292, 266);
this.Controls.Add(this.Button3);
this.Controls.Add(this.Button2);
this.Controls.Add(this.Button1);
this.Controls.Add(this.LayoutControl1);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);
this.Button1.Click += new System.EventHandler(Button1_Click);
this.Button2.Click += new System.EventHandler(Button2_Click);
this.Button3.Click += new System.EventHandler(Button3_Click);
}
[System.STAThread]
public static void Main()
{
Application.Run(new LayoutForm());
}
// This method explicitly calls raises the layout event on
// LayoutControl1, changing the Bounds property.
private void Button1_Click(System.Object sender, System.EventArgs e)
{
LayoutControl1.PerformLayout(LayoutControl1, "Bounds");
}
// This resize of LayoutControl1 implicitly triggers the layout event.
// Changing the size of the control affects its Bounds property.
private void Button2_Click(System.Object sender, System.EventArgs e)
{
LayoutControl1.Size = new System.Drawing.Size(100, 100);
}
// This method explicitly calls PerformLayout with no parameters,
// which raises the Layout event with the LayoutEventArgs properties
// equal to Nothing.
private void Button3_Click(System.Object sender, System.EventArgs e)
{
LayoutControl1.PerformLayout();
}
}
// This custom control has the Layout event implented so that when
// PerformLayout(AffectedControl, AffectedProperty) is called
// on the control, where AffectedProperty equals "Bounds" the
// textbox is centered on the control.
public class LayoutControl:
System.Windows.Forms.UserControl
{
internal System.Windows.Forms.TextBox TextBox1;
public LayoutControl() : base()
{
InitializeComponent();
}
private void InitializeComponent()
{
this.TextBox1 = new System.Windows.Forms.TextBox();
this.SuspendLayout();
this.TextBox1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.TextBox1.Name = "TextBox1";
this.TextBox1.TabIndex = 0;
this.BackColor = System.Drawing.SystemColors.ControlDark;
this.Controls.Add(this.TextBox1);
this.Name = "LayoutControl";
this.ResumeLayout(false);
this.Layout += new LayoutEventHandler(LayoutControl_Layout);
}
// This method is called when the Layout event is fired.
// This happens by during the initial load, by calling PerformLayout
// or by resizing, adding or removing controls or other actions that
// affect how the control is laid out. This method checks the
// value of e.AffectedProperty and changes the look of the
// control accordingly.
private void LayoutControl_Layout(object sender,
System.Windows.Forms.LayoutEventArgs e)
{
if (e.AffectedProperty != null)
{
if (e.AffectedProperty.Equals("Bounds"))
{
TextBox1.Left = (this.Width-TextBox1.Width)/2;
TextBox1.Top = (this.Height-TextBox1.Height)/2;
}
}
else
{
this.Size = new System.Drawing.Size(150, 160);
TextBox1.Location = new System.Drawing.Point(16, 24);
}
TextBox1.Text = "Left = "+TextBox1.Left+" Top = "+TextBox1.Top;
}
}
Imports System.Windows.Forms
Imports System.Drawing
Public Class LayoutForm
Inherits System.Windows.Forms.Form
Public Sub New()
MyBase.New()
InitializeComponent()
End Sub
Friend WithEvents Button1 As System.Windows.Forms.Button
Friend WithEvents Button2 As System.Windows.Forms.Button
Friend WithEvents LayoutControl1 As LayoutControl
Friend WithEvents Button3 As System.Windows.Forms.Button
Private Sub InitializeComponent()
Me.Button1 = New System.Windows.Forms.Button
Me.Button2 = New System.Windows.Forms.Button
Me.Button3 = New System.Windows.Forms.Button
Me.LayoutControl1 = New LayoutControl
Me.SuspendLayout()
Me.Button1.Location = New System.Drawing.Point(16, 16)
Me.Button1.Name = "Button1"
Me.Button1.Size = New System.Drawing.Size(120, 32)
Me.Button1.TabIndex = 0
Me.Button1.Text = "Center textbox on control"
Me.Button2.Location = New System.Drawing.Point(152, 16)
Me.Button2.Name = "Button2"
Me.Button2.Size = New System.Drawing.Size(104, 32)
Me.Button2.TabIndex = 3
Me.Button2.Text = "Shrink user control"
Me.Button3.Location = New System.Drawing.Point(96, 232)
Me.Button3.Name = "Button3"
Me.Button3.TabIndex = 5
Me.Button3.Text = "Reset"
Me.LayoutControl1.BackColor = System.Drawing.SystemColors.ControlDark
Me.LayoutControl1.Location = New System.Drawing.Point(72, 64)
Me.LayoutControl1.Name = "LayoutControl1"
Me.LayoutControl1.Size = New System.Drawing.Size(150, 160)
Me.LayoutControl1.TabIndex = 6
Me.ClientSize = New System.Drawing.Size(292, 266)
Me.Controls.Add(Me.Button3)
Me.Controls.Add(Me.Button2)
Me.Controls.Add(Me.Button1)
Me.Controls.Add(Me.LayoutControl1)
Me.Name = "Form1"
Me.Text = "Form1"
Me.ResumeLayout(False)
End Sub
<System.STAThread()> Shared Sub Main()
Application.Run(New LayoutForm)
End Sub
' This method explicitly calls raises the layout event on
' LayoutControl1, changing the Bounds property.
Private Sub Button1_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button1.Click
LayoutControl1.PerformLayout(LayoutControl1, "Bounds")
End Sub
' This resize of LayoutControl1 implicitly triggers the layout event.
' Changing the size of the control affects its Bounds property.
Private Sub Button2_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button2.Click
LayoutControl1.Size = New System.Drawing.Size(100, 100)
End Sub
' This method explicitly calls PerformLayout with no parameters,
' which raises the Layout event with the LayoutEventArgs properties
' equal to Nothing.
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
LayoutControl1.PerformLayout()
End Sub
End Class
'This custom control has the Layout event implented so that when
'PerformLayout(AffectedControl, AffectedProperty) is called on the control,
'where AffectedProperty equals "Bounds" the textbox is centered on the control.
Public Class LayoutControl
Inherits System.Windows.Forms.UserControl
Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
Public Sub New()
MyBase.New()
InitializeComponent()
End Sub
Private Sub InitializeComponent()
Me.TextBox1 = New System.Windows.Forms.TextBox
Me.SuspendLayout()
Me.TextBox1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle
Me.TextBox1.Name = "TextBox1"
Me.TextBox1.TabIndex = 0
Me.BackColor = System.Drawing.SystemColors.ControlDark
Me.Controls.Add(Me.TextBox1)
Me.Name = "LayoutControl"
Me.ResumeLayout(False)
End Sub
'This method is called when the Layout event is fired. This happens by during the initial load,
'by calling PerformLayout or by resizing, adding or removing controls or other actions that
'affect how the control is laid out. This method checks the value of e.AffectedProperty
'and changes the look of the control accordingly.
Private Sub LayoutControl_Layout(ByVal sender As Object, ByVal e As System.Windows.Forms.LayoutEventArgs) Handles MyBase.Layout
If e.AffectedProperty IsNot Nothing Then
If e.AffectedProperty.Equals("Bounds") Then
TextBox1.Left = (Me.Width - TextBox1.Width) / 2
TextBox1.Top = (Me.Height - TextBox1.Height) / 2
End If
Else
Me.Size = New System.Drawing.Size(150, 160)
TextBox1.Location = New System.Drawing.Point(16, 24)
End If
TextBox1.Text = "Left = " & TextBox1.Left & " Top = " & TextBox1.Top
End Sub
End Class
Hinweise
Wenn die SuspendLayout -Methode vor dem Aufrufen der PerformLayout -Methode aufgerufen wurde, wird das Layout Ereignis unterdrückt.
Die affectedControl Parameter und affectedProperty können auf festgelegt nullwerden. Dadurch werden die AffectedControl Eigenschaften und AffectedProperty des LayoutEventArgs erstellten auf nullfestgelegt.
Weitere Informationen
- ResumeLayout()
- LayoutEngine
- Layout
- PerformLayout()
- SuspendLayout()
- InitLayout()
- BackgroundImageLayout
Gilt für:
PerformLayout()
Erzwingt die Anwendung von Layoutlogik durch das Steuerelement auf sämtliche diesem untergeordneten Steuerelemente.
public:
void PerformLayout();public void PerformLayout ();member this.PerformLayout : unit -> unitPublic Sub PerformLayout ()Beispiele
Das folgende Codebeispiel zeigt, wie Sie die PerformLayout-Methode verwenden. Außerdem wird veranschaulicht, wie das Layout Ereignis ausgelöst wird. In diesem Beispiel ruft der Click Ereignishandler für Button1 explizit auf PerformLayout. Der Click Ereignishandler für Button2 ruft implizit auf PerformLayout. PerformLayout wird auch aufgerufen, wenn das Formular geladen wird. Button3 gibt das Steuerelement in den Zustand zurück, in dem es sich beim Laden befand. In jedem Fall wird das Layout Ereignis ausgelöst.
Dies ist ein vollständiges Beispiel. Fügen Sie zum Ausführen des Beispiels den folgenden Code in eine leere Form ein.
using namespace System;
using namespace System::Windows::Forms;
using namespace System::Drawing;
// This custom control has the Layout event implented so that when
// PerformLayout(AffectedControl, AffectedProperty) is called
// on the control, where AffectedProperty equals "Bounds" the
// textbox is centered on the control.
public ref class LayoutControl: public System::Windows::Forms::UserControl
{
public private:
System::Windows::Forms::TextBox^ TextBox1;
public:
LayoutControl()
: UserControl()
{
InitializeComponent();
}
private:
void InitializeComponent()
{
this->TextBox1 = gcnew System::Windows::Forms::TextBox;
this->SuspendLayout();
this->TextBox1->BorderStyle = System::Windows::Forms::BorderStyle::FixedSingle;
this->TextBox1->Name = "TextBox1";
this->TextBox1->TabIndex = 0;
this->BackColor = System::Drawing::SystemColors::ControlDark;
this->Controls->Add( this->TextBox1 );
this->Name = "LayoutControl";
this->ResumeLayout( false );
this->Layout += gcnew LayoutEventHandler( this, &LayoutControl::LayoutControl_Layout );
}
// This method is called when the Layout event is fired.
// This happens by during the initial load, by calling PerformLayout
// or by resizing, adding or removing controls or other actions that
// affect how the control is laid out. This method checks the
// value of e.AffectedProperty and changes the look of the
// control accordingly.
void LayoutControl_Layout( Object^ /*sender*/, System::Windows::Forms::LayoutEventArgs^ e )
{
if ( e->AffectedProperty != nullptr )
{
if ( e->AffectedProperty->Equals( "Bounds" ) )
{
TextBox1->Left = (this->Width - TextBox1->Width) / 2;
TextBox1->Top = (this->Height - TextBox1->Height) / 2;
}
}
else
{
this->Size = System::Drawing::Size( 150, 160 );
TextBox1->Location = System::Drawing::Point( 16, 24 );
}
TextBox1->Text = String::Format( "Left = {0} Top = {1}", TextBox1->Left, TextBox1->Top );
}
};
public ref class LayoutForm: public System::Windows::Forms::Form
{
public:
LayoutForm()
: Form()
{
InitializeComponent();
}
public private:
System::Windows::Forms::Button^ Button1;
System::Windows::Forms::Button^ Button2;
LayoutControl^ LayoutControl1;
System::Windows::Forms::Button^ Button3;
private:
void InitializeComponent()
{
this->Button1 = gcnew System::Windows::Forms::Button;
this->Button2 = gcnew System::Windows::Forms::Button;
this->Button3 = gcnew System::Windows::Forms::Button;
this->LayoutControl1 = gcnew LayoutControl;
this->SuspendLayout();
this->Button1->Location = System::Drawing::Point( 16, 16 );
this->Button1->Name = "Button1";
this->Button1->Size = System::Drawing::Size( 120, 32 );
this->Button1->TabIndex = 0;
this->Button1->Text = "Center textbox on control";
this->Button2->Location = System::Drawing::Point( 152, 16 );
this->Button2->Name = "Button2";
this->Button2->Size = System::Drawing::Size( 104, 32 );
this->Button2->TabIndex = 3;
this->Button2->Text = "Shrink user control";
this->Button3->Location = System::Drawing::Point( 96, 232 );
this->Button3->Name = "Button3";
this->Button3->TabIndex = 5;
this->Button3->Text = "Reset";
this->LayoutControl1->BackColor = System::Drawing::SystemColors::ControlDark;
this->LayoutControl1->Location = System::Drawing::Point( 72, 64 );
this->LayoutControl1->Name = "LayoutControl1";
this->LayoutControl1->Size = System::Drawing::Size( 150, 160 );
this->LayoutControl1->TabIndex = 6;
this->ClientSize = System::Drawing::Size( 292, 266 );
this->Controls->Add( this->Button3 );
this->Controls->Add( this->Button2 );
this->Controls->Add( this->Button1 );
this->Controls->Add( this->LayoutControl1 );
this->Name = "Form1";
this->Text = "Form1";
this->ResumeLayout( false );
this->Button1->Click += gcnew System::EventHandler( this,&LayoutForm::Button1_Click );
this->Button2->Click += gcnew System::EventHandler( this,&LayoutForm::Button2_Click );
this->Button3->Click += gcnew System::EventHandler( this,&LayoutForm::Button3_Click );
}
// This method explicitly calls raises the layout event on
// LayoutControl1, changing the Bounds property.
void Button1_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
LayoutControl1->PerformLayout( LayoutControl1, "Bounds" );
}
// This resize of LayoutControl1 implicitly triggers the layout event.
// Changing the size of the control affects its Bounds property.
void Button2_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
LayoutControl1->Size = System::Drawing::Size( 100, 100 );
}
// This method explicitly calls PerformLayout with no parameters,
// which raises the Layout event with the LayoutEventArgs properties
// equal to Nothing.
void Button3_Click( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
LayoutControl1->PerformLayout();
}
};
[System::STAThread]
int main()
{
Application::Run( gcnew LayoutForm );
}
using System.Windows.Forms;
using System.Drawing;
public class LayoutForm:
System.Windows.Forms.Form
{
public LayoutForm() : base()
{
InitializeComponent();
}
internal System.Windows.Forms.Button Button1;
internal System.Windows.Forms.Button Button2;
internal LayoutControl LayoutControl1;
internal System.Windows.Forms.Button Button3;
private void InitializeComponent()
{
this.Button1 = new System.Windows.Forms.Button();
this.Button2 = new System.Windows.Forms.Button();
this.Button3 = new System.Windows.Forms.Button();
this.LayoutControl1 = new LayoutControl();
this.SuspendLayout();
this.Button1.Location = new System.Drawing.Point(16, 16);
this.Button1.Name = "Button1";
this.Button1.Size = new System.Drawing.Size(120, 32);
this.Button1.TabIndex = 0;
this.Button1.Text = "Center textbox on control";
this.Button2.Location = new System.Drawing.Point(152, 16);
this.Button2.Name = "Button2";
this.Button2.Size = new System.Drawing.Size(104, 32);
this.Button2.TabIndex = 3;
this.Button2.Text = "Shrink user control";
this.Button3.Location = new System.Drawing.Point(96, 232);
this.Button3.Name = "Button3";
this.Button3.TabIndex = 5;
this.Button3.Text = "Reset";
this.LayoutControl1.BackColor = System.Drawing.SystemColors.ControlDark;
this.LayoutControl1.Location = new System.Drawing.Point(72, 64);
this.LayoutControl1.Name = "LayoutControl1";
this.LayoutControl1.Size = new System.Drawing.Size(150, 160);
this.LayoutControl1.TabIndex = 6;
this.ClientSize = new System.Drawing.Size(292, 266);
this.Controls.Add(this.Button3);
this.Controls.Add(this.Button2);
this.Controls.Add(this.Button1);
this.Controls.Add(this.LayoutControl1);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);
this.Button1.Click += new System.EventHandler(Button1_Click);
this.Button2.Click += new System.EventHandler(Button2_Click);
this.Button3.Click += new System.EventHandler(Button3_Click);
}
[System.STAThread]
public static void Main()
{
Application.Run(new LayoutForm());
}
// This method explicitly calls raises the layout event on
// LayoutControl1, changing the Bounds property.
private void Button1_Click(System.Object sender, System.EventArgs e)
{
LayoutControl1.PerformLayout(LayoutControl1, "Bounds");
}
// This resize of LayoutControl1 implicitly triggers the layout event.
// Changing the size of the control affects its Bounds property.
private void Button2_Click(System.Object sender, System.EventArgs e)
{
LayoutControl1.Size = new System.Drawing.Size(100, 100);
}
// This method explicitly calls PerformLayout with no parameters,
// which raises the Layout event with the LayoutEventArgs properties
// equal to Nothing.
private void Button3_Click(System.Object sender, System.EventArgs e)
{
LayoutControl1.PerformLayout();
}
}
// This custom control has the Layout event implented so that when
// PerformLayout(AffectedControl, AffectedProperty) is called
// on the control, where AffectedProperty equals "Bounds" the
// textbox is centered on the control.
public class LayoutControl:
System.Windows.Forms.UserControl
{
internal System.Windows.Forms.TextBox TextBox1;
public LayoutControl() : base()
{
InitializeComponent();
}
private void InitializeComponent()
{
this.TextBox1 = new System.Windows.Forms.TextBox();
this.SuspendLayout();
this.TextBox1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.TextBox1.Name = "TextBox1";
this.TextBox1.TabIndex = 0;
this.BackColor = System.Drawing.SystemColors.ControlDark;
this.Controls.Add(this.TextBox1);
this.Name = "LayoutControl";
this.ResumeLayout(false);
this.Layout += new LayoutEventHandler(LayoutControl_Layout);
}
// This method is called when the Layout event is fired.
// This happens by during the initial load, by calling PerformLayout
// or by resizing, adding or removing controls or other actions that
// affect how the control is laid out. This method checks the
// value of e.AffectedProperty and changes the look of the
// control accordingly.
private void LayoutControl_Layout(object sender,
System.Windows.Forms.LayoutEventArgs e)
{
if (e.AffectedProperty != null)
{
if (e.AffectedProperty.Equals("Bounds"))
{
TextBox1.Left = (this.Width-TextBox1.Width)/2;
TextBox1.Top = (this.Height-TextBox1.Height)/2;
}
}
else
{
this.Size = new System.Drawing.Size(150, 160);
TextBox1.Location = new System.Drawing.Point(16, 24);
}
TextBox1.Text = "Left = "+TextBox1.Left+" Top = "+TextBox1.Top;
}
}
Imports System.Windows.Forms
Imports System.Drawing
Public Class LayoutForm
Inherits System.Windows.Forms.Form
Public Sub New()
MyBase.New()
InitializeComponent()
End Sub
Friend WithEvents Button1 As System.Windows.Forms.Button
Friend WithEvents Button2 As System.Windows.Forms.Button
Friend WithEvents LayoutControl1 As LayoutControl
Friend WithEvents Button3 As System.Windows.Forms.Button
Private Sub InitializeComponent()
Me.Button1 = New System.Windows.Forms.Button
Me.Button2 = New System.Windows.Forms.Button
Me.Button3 = New System.Windows.Forms.Button
Me.LayoutControl1 = New LayoutControl
Me.SuspendLayout()
Me.Button1.Location = New System.Drawing.Point(16, 16)
Me.Button1.Name = "Button1"
Me.Button1.Size = New System.Drawing.Size(120, 32)
Me.Button1.TabIndex = 0
Me.Button1.Text = "Center textbox on control"
Me.Button2.Location = New System.Drawing.Point(152, 16)
Me.Button2.Name = "Button2"
Me.Button2.Size = New System.Drawing.Size(104, 32)
Me.Button2.TabIndex = 3
Me.Button2.Text = "Shrink user control"
Me.Button3.Location = New System.Drawing.Point(96, 232)
Me.Button3.Name = "Button3"
Me.Button3.TabIndex = 5
Me.Button3.Text = "Reset"
Me.LayoutControl1.BackColor = System.Drawing.SystemColors.ControlDark
Me.LayoutControl1.Location = New System.Drawing.Point(72, 64)
Me.LayoutControl1.Name = "LayoutControl1"
Me.LayoutControl1.Size = New System.Drawing.Size(150, 160)
Me.LayoutControl1.TabIndex = 6
Me.ClientSize = New System.Drawing.Size(292, 266)
Me.Controls.Add(Me.Button3)
Me.Controls.Add(Me.Button2)
Me.Controls.Add(Me.Button1)
Me.Controls.Add(Me.LayoutControl1)
Me.Name = "Form1"
Me.Text = "Form1"
Me.ResumeLayout(False)
End Sub
<System.STAThread()> Shared Sub Main()
Application.Run(New LayoutForm)
End Sub
' This method explicitly calls raises the layout event on
' LayoutControl1, changing the Bounds property.
Private Sub Button1_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button1.Click
LayoutControl1.PerformLayout(LayoutControl1, "Bounds")
End Sub
' This resize of LayoutControl1 implicitly triggers the layout event.
' Changing the size of the control affects its Bounds property.
Private Sub Button2_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button2.Click
LayoutControl1.Size = New System.Drawing.Size(100, 100)
End Sub
' This method explicitly calls PerformLayout with no parameters,
' which raises the Layout event with the LayoutEventArgs properties
' equal to Nothing.
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
LayoutControl1.PerformLayout()
End Sub
End Class
'This custom control has the Layout event implented so that when
'PerformLayout(AffectedControl, AffectedProperty) is called on the control,
'where AffectedProperty equals "Bounds" the textbox is centered on the control.
Public Class LayoutControl
Inherits System.Windows.Forms.UserControl
Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
Public Sub New()
MyBase.New()
InitializeComponent()
End Sub
Private Sub InitializeComponent()
Me.TextBox1 = New System.Windows.Forms.TextBox
Me.SuspendLayout()
Me.TextBox1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle
Me.TextBox1.Name = "TextBox1"
Me.TextBox1.TabIndex = 0
Me.BackColor = System.Drawing.SystemColors.ControlDark
Me.Controls.Add(Me.TextBox1)
Me.Name = "LayoutControl"
Me.ResumeLayout(False)
End Sub
'This method is called when the Layout event is fired. This happens by during the initial load,
'by calling PerformLayout or by resizing, adding or removing controls or other actions that
'affect how the control is laid out. This method checks the value of e.AffectedProperty
'and changes the look of the control accordingly.
Private Sub LayoutControl_Layout(ByVal sender As Object, ByVal e As System.Windows.Forms.LayoutEventArgs) Handles MyBase.Layout
If e.AffectedProperty IsNot Nothing Then
If e.AffectedProperty.Equals("Bounds") Then
TextBox1.Left = (Me.Width - TextBox1.Width) / 2
TextBox1.Top = (Me.Height - TextBox1.Height) / 2
End If
Else
Me.Size = New System.Drawing.Size(150, 160)
TextBox1.Location = New System.Drawing.Point(16, 24)
End If
TextBox1.Text = "Left = " & TextBox1.Left & " Top = " & TextBox1.Top
End Sub
End Class
Hinweise
Wenn die SuspendLayout -Methode vor dem Aufrufen der PerformLayout -Methode aufgerufen wurde, wird das Layout Ereignis unterdrückt.
Die AffectedControl Eigenschaften und AffectedProperty des LayoutEventArgs erstellten werden auf null festgelegt, wenn beim Aufrufen der PerformLayout Methode keine Werte angegeben wurden.
Weitere Informationen
- ResumeLayout()
- LayoutEngine
- Layout
- PerformLayout()
- SuspendLayout()
- InitLayout()
- BackgroundImageLayout
Gilt für:
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