vb.net 教程 3-7 窗体编程 菜单和工具栏 3 StatusStrip 2

通过上一节的学习，大家对StatusStrip控件有了初步了解，

本节主要讲解如何通过代码操作StatusStrip，在上一节窗体基础上增加两个按钮：

按下“修改状态栏标签”按钮

    '修改状态栏标签
    Private Sub Button1_Click(sender As Object,e As EventArgs) Handles Button1.Click
        ToolStripStatusLabel1.Text = "这是状态栏"
        ToolStripStatusLabel1.Image = Nothing
    End Sub

按下后：

按下“启动进度条”按钮：

    '启动进度条
    Private Sub Button2_Click(sender As Object,e As EventArgs) Handles Button2.Click
        For i As Integer = 0 To 100
            ToolStripProgressBar1.Value = i
            Threading.Thread.Sleep(100)
        Next
    End Sub

在窗体编辑器上双击粗体、斜体或者下划线按钮添加Click事件，

使标签上的图片变化，同时使ToolStripDropDownButton1上的图片也跟着变化：

    '粗体
    Private Sub 粗体ToolStripMenuItem3_Click(sender As Object,e As EventArgs) Handles 粗体ToolStripMenuItem3.Click
        ToolStripStatusLabel1.Image = 粗体ToolStripMenuItem3.Image
        ToolStripStatusLabel1.Text = ""
        ToolStripDropDownButton1.Image = 粗体ToolStripMenuItem3.Image
    End Sub
    '斜体
    Private Sub 斜体ToolStripMenuItem_Click(sender As Object,e As EventArgs) Handles 斜体ToolStripMenuItem.Click
        ToolStripStatusLabel1.Image = 斜体ToolStripMenuItem.Image
        ToolStripStatusLabel1.Text = ""
        ToolStripDropDownButton1.Image = 斜体ToolStripMenuItem.Image
    End Sub
    '下划线
    Private Sub 下划线ToolStripMenuItem_Click(sender As Object,e As EventArgs) Handles 下划线ToolStripMenuItem.Click
        ToolStripStatusLabel1.Image = 下划线ToolStripMenuItem.Image
        ToolStripStatusLabel1.Text = ""
        ToolStripDropDownButton1.Image = 下划线ToolStripMenuItem.Image
    End Sub

运行时如图：

在窗体编辑器上双击左对齐、右对齐或者ToolStripSplitButton1添加Click事件：

    '左对齐
    Private Sub 左对齐ToolStripMenuItem_Click(sender As Object,e As EventArgs) Handles 左对齐ToolStripMenuItem.Click
        ToolStripStatusLabel1.Image = Nothing
        ToolStripStatusLabel1.Text = "这是状态栏说明"
        ToolStripStatusLabel1.TextAlign = ContentAlignment.MiddleLeft
    End Sub
    '右对齐
    Private Sub 右对齐ToolStripMenuItem_Click(sender As Object,e As EventArgs) Handles 右对齐ToolStripMenuItem.Click
        ToolStripStatusLabel1.Image = Nothing
        ToolStripStatusLabel1.Text = "这是状态栏说明"
        ToolStripStatusLabel1.TextAlign = ContentAlignment.MiddleRight
    End Sub
    '直接按下ToolStripSplitButton1
    Private Sub ToolStripSplitButton1_ButtonClick(sender As Object,e As EventArgs) Handles ToolStripSplitButton1.ButtonClick
        ToolStripStatusLabel1.Image = Nothing
        ToolStripStatusLabel1.Text = "这是状态栏说明"
        ToolStripStatusLabel1.TextAlign = ContentAlignment.MiddleCenter
    End Sub

运行时如图：

需要注意的是，虽然按下左对齐、右对齐后改变了文字对齐方式，但是由于ToolStripStatusLabel1的ImageAlign属性设置为了MiddleCenter

所以按下ToolStripDropDownButton上的粗体、斜体、下划线按钮后，显示的图片的对齐方式不受文字对齐方式的影响。

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