VB.NET Control.BackColor属性代码示例

' Reset all the controls to the user's default Control color. 
Private Sub ResetAllControlsBackColor(control As Control)
   control.BackColor = SystemColors.Control
   control.ForeColor = SystemColors.ControlText
   If control.HasChildren Then
      ' Recursively call this method for each child control.
      Dim childControl As Control
      For Each childControl In  control.Controls
         ResetAllControlsBackColor(childControl)
      Next childControl
   End If
End Sub

' 导入命名空间
Imports System.Windows.Forms
Imports System.Drawing
Imports System.Drawing.Drawing2D

public class GetAllControlsOnForm
   public Shared Sub Main
        Application.Run(New Form1)
   End Sub
End class



Public Class Form1
    Private Sub ActRed_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ActRed.Click
        For Each scanControls As Control In Me.Controls
            If (TypeOf scanControls Is Label) Then
                scanControls.BackColor = Color.Red
            End If
        Next scanControls
    End Sub

    Private Sub ActNormal_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ActNormal.Click

        For Each scanControls As Control In Me.Controls
            If (TypeOf scanControls Is Label) Then
                scanControls.BackColor = SystemColors.Control
            End If
        Next scanControls

    End Sub

End Class



<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
Partial Class Form1
    Inherits System.Windows.Forms.Form

    'Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing AndAlso components IsNot Nothing Then
            components.Dispose()
        End If
        MyBase.Dispose(disposing)
    End Sub

    'Required by the Windows Form Designer
    Private components As System.ComponentModel.IContainer

    'NOTE: The following procedure is required by the Windows Form Designer
    'It can be modified using the Windows Form Designer.  
    'Do not modify it using the code editor.
    <System.Diagnostics.DebuggerStepThrough()> _
    Private Sub InitializeComponent()
        Me.Label1 = New System.Windows.Forms.Label
        Me.ActRed = New System.Windows.Forms.Button
        Me.Label2 = New System.Windows.Forms.Label
        Me.Label3 = New System.Windows.Forms.Label
        Me.ActNormal = New System.Windows.Forms.Button
        Me.SuspendLayout()
        '
        'Label1
        '
        Me.Label1.AutoSize = True
        Me.Label1.Location = New System.Drawing.Point(8, 8)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(39, 13)
        Me.Label1.TabIndex = 0
        Me.Label1.Text = "Label1"
        '
        'ActRed
        '
        Me.ActRed.Location = New System.Drawing.Point(16, 88)
        Me.ActRed.Name = "ActRed"
        Me.ActRed.Size = New System.Drawing.Size(75, 23)
        Me.ActRed.TabIndex = 1
        Me.ActRed.Text = "Red"
        Me.ActRed.UseVisualStyleBackColor = True
        '
        'Label2
        '
        Me.Label2.AutoSize = True
        Me.Label2.Location = New System.Drawing.Point(8, 32)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(39, 13)
        Me.Label2.TabIndex = 2
        Me.Label2.Text = "Label2"
        '
        'Label3
        '
        Me.Label3.AutoSize = True
        Me.Label3.Location = New System.Drawing.Point(8, 56)
        Me.Label3.Name = "Label3"
        Me.Label3.Size = New System.Drawing.Size(39, 13)
        Me.Label3.TabIndex = 3
        Me.Label3.Text = "Label3"
        '
        'ActNormal
        '
        Me.ActNormal.Location = New System.Drawing.Point(104, 88)
        Me.ActNormal.Name = "ActNormal"
        Me.ActNormal.Size = New System.Drawing.Size(75, 23)
        Me.ActNormal.TabIndex = 4
        Me.ActNormal.Text = "Normal"
        Me.ActNormal.UseVisualStyleBackColor = True
        '
        'Form1
        '
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(292, 127)
        Me.Controls.Add(Me.ActNormal)
        Me.Controls.Add(Me.Label3)
        Me.Controls.Add(Me.Label2)
        Me.Controls.Add(Me.ActRed)
        Me.Controls.Add(Me.Label1)
        Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle
        Me.MaximizeBox = False
        Me.Name = "Form1"
        Me.Text = "Iterating Controls"
        Me.ResumeLayout(False)
        Me.PerformLayout()

    End Sub
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents ActRed As System.Windows.Forms.Button
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents Label3 As System.Windows.Forms.Label
    Friend WithEvents ActNormal As System.Windows.Forms.Button

End Class