Control.PerformLayout Método

Definición

Espacio de nombres:

System.Windows.Forms

Ensamblado:

System.Windows.Forms.dll

Obliga al control a aplicar la lógica de diseño a los controles secundarios.

Sobrecargas

PerformLayout(Control, String)	Obliga al control a aplicar la lógica de diseño a todos sus controles secundarios.
PerformLayout()	Obliga al control a aplicar la lógica de diseño a todos sus controles secundarios.

PerformLayout(Control, String)

Source:

Control.cs

Obliga al control a aplicar la lógica de diseño a todos sus controles secundarios.

C#

public void PerformLayout(System.Windows.Forms.Control? affectedControl, string? affectedProperty);

Parámetros

affectedControl

Control

Control que representa al control modificado más recientemente.

affectedProperty

String

Nombre de propiedad modificada más recientemente en el control.

Ejemplos

En el ejemplo de código siguiente se muestra cómo utilizar el método PerformLayout. También muestra las formas en que se genera el Layout evento. En este ejemplo, el Click controlador de eventos para Button1 llama explícitamente a PerformLayout. El Click controlador de eventos para Button2 llama implícitamente a PerformLayout. PerformLayout también se llama cuando se carga el formulario. Button3 devuelve el control al estado en el que estaba cargado. En cada caso, se genera el Layout evento .

Este es un ejemplo completo. Para ejecutar el ejemplo, pegue el código siguiente en un formulario en blanco.

C#

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;
    }
}

Comentarios

Si se llamó al SuspendLayout método antes de llamar al PerformLayout método , se suprime el Layout evento.

Los affectedControl parámetros y affectedProperty se pueden establecer nullen . Al hacerlo, las AffectedControl propiedades y AffectedProperty del LayoutEventArgs objeto creado se establecen en null.

Consulte también

• ResumeLayout()
• LayoutEngine
• Layout
• PerformLayout()
• SuspendLayout()
• InitLayout()
• BackgroundImageLayout

PerformLayout()

Source:

Control.cs

Obliga al control a aplicar la lógica de diseño a todos sus controles secundarios.

C#

public void PerformLayout();

Ejemplos

En el ejemplo de código siguiente se muestra cómo utilizar el método PerformLayout. También muestra las formas en que se genera el Layout evento. En este ejemplo, el Click controlador de eventos para Button1 llama explícitamente a PerformLayout. El Click controlador de eventos para Button2 llama implícitamente a PerformLayout. PerformLayout también se llama cuando se carga el formulario. Button3 devuelve el control al estado en el que estaba cargado. En cada caso, se genera el Layout evento .

Este es un ejemplo completo. Para ejecutar el ejemplo, pegue el código siguiente en un formulario en blanco.

C#

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;
    }
}

Comentarios

Si se llamó al SuspendLayout método antes de llamar al PerformLayout método , se suprime el Layout evento.

Las AffectedControl propiedades y AffectedProperty del LayoutEventArgs objeto creado se establecen null en si no se proporcionó ningún valor cuando se llamó al PerformLayout método .

Consulte también

• ResumeLayout()
• LayoutEngine
• Layout
• PerformLayout()
• SuspendLayout()
• InitLayout()
• BackgroundImageLayout