HOW TO：在 StatusStrip 中以互動方式使用 Spring 屬性

發行項
08/21/2008

更新：2007 年 11 月

您可以使用 Spring 屬性，在 StatusStrip 控制項中放置 ToolStripStatusLabel 控制項。Spring 屬性會判斷 ToolStripStatusLabel 控制項是否會自動填滿 StatusStrip 控制項上的可用空間。

範例

下列程式碼範例會示範如何使用 Spring 屬性，將 ToolStripStatusLabel 控制項放置在 StatusStrip 控制項中。Click 事件處理常式會執行 Exclusive-OR (XOR) 運算，以切換 Spring 屬性的值。

若要使用這個程式碼範例，請編譯並執行應用程式，然後按一下 StatusStrip 控制項上的 [Middle (Spring)]，以切換 Spring 屬性的值。

Imports System
Imports System.Collections.Generic
Imports System.Windows.Forms
Imports System.Drawing


...


' This code example demonstrates using the Spring property 
' to interactively center a ToolStripStatusLabel in a StatusStrip.
Class Form4
    Inherits Form

   ' Declare the ToolStripStatusLabel.
   Private middleLabel As ToolStripStatusLabel


   Public Sub New()
      ' Create a new StatusStrip control.
      Dim ss As New StatusStrip()

      ' Add the leftmost label.
      ss.Items.Add("Left")

      ' Handle middle label separately -- action will occur
      ' when the label is clicked.
      middleLabel = New ToolStripStatusLabel("Middle (Spring)")
      AddHandler middleLabel.Click, AddressOf middleLabel_Click
      ss.Items.Add(middleLabel)

      ' Add the rightmost label
      ss.Items.Add("Right")

      ' Add the StatusStrip control to the controls collection.
      Me.Controls.Add(ss)
    End Sub

   ' This event hadler is invoked when the 
   ' middleLabel control is clicked. It toggles
   ' the value of the Spring property.
    Sub middleLabel_Click(ByVal sender As Object, ByVal e As EventArgs)

        ' Toggle the value of the Spring property.
        middleLabel.Spring = middleLabel.Spring Xor True

        ' Set the Text property according to the
        ' value of the Spring property. 
        middleLabel.Text = IIf(middleLabel.Spring, _
        "Middle (Spring - True)", "Middle (Spring - False)")
    End Sub
End Class

using System;
using System.Collections.Generic;
using System.Windows.Forms;
using System.Drawing;


...


// This code example demonstrates using the Spring property 
// to interactively center a ToolStripStatusLabel in a StatusStrip.
class Form4 : Form
{
    // Declare the ToolStripStatusLabel.
    ToolStripStatusLabel middleLabel;

    public Form4()
    {
        // Create a new StatusStrip control.
        StatusStrip ss = new StatusStrip();

        // Add the leftmost label.
        ss.Items.Add("Left");

        // Handle middle label separately -- action will occur
        // when the label is clicked.
        middleLabel = new ToolStripStatusLabel("Middle (Spring)");
        middleLabel.Click += new EventHandler(middleLabel_Click);
        ss.Items.Add(middleLabel);

        // Add the rightmost label
        ss.Items.Add("Right");

        // Add the StatusStrip control to the controls collection.
        this.Controls.Add(ss);
    }

    // This event hadler is invoked when the 
    // middleLabel control is clicked. It toggles
    // the value of the Spring property.
    void middleLabel_Click(object sender, EventArgs e)
    {
        // Toggle the value of the Spring property.
        middleLabel.Spring ^= true;

        // Set the Text property according to the
        // value of the Spring property. 
        middleLabel.Text = 
            middleLabel.Spring ? "Middle (Spring - True)" : "Middle (Spring - False)";
    }
}