VB.NET ComboBox.Text属性代码示例

' Declare ComboBox1.
Friend WithEvents ComboBox1 As System.Windows.Forms.ComboBox

' Initialize ComboBox1.
Private Sub InitializeComboBox()
    Me.ComboBox1 = New ComboBox
    Me.ComboBox1.Location = New System.Drawing.Point(128, 48)
    Me.ComboBox1.Name = "ComboBox1"
    Me.ComboBox1.Size = New System.Drawing.Size(100, 21)
    Me.ComboBox1.TabIndex = 0
    Me.ComboBox1.Text = "Typical"
    Dim installs() As String = New String() _
        {"Typical", "Compact", "Custom"}
    ComboBox1.Items.AddRange(installs)
    Me.Controls.Add(Me.ComboBox1)
End Sub

' Handles the ComboBox1 DropDown event. If the user expands the  
' drop-down box, a message box will appear, recommending the
' typical installation.
Private Sub ComboBox1_DropDown _ 
    (ByVal sender As Object, ByVal e As System.EventArgs) _ 
    Handles ComboBox1.DropDown
    MessageBox.Show("Typical installation is strongly recommended.", _
    "Install information", MessageBoxButtons.OK, MessageBoxIcon.Information)
End Sub

' 导入命名空间
Imports System.Windows.Forms

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

Public Class Form1

    Private Sub Button1_Click(ByVal sender As System.Object, _
                              ByVal e As System.EventArgs) _
                              Handles Button1.Click
        Dim Language As String

        Language = ComboBox1.Text
        If Language = "Visual Basic" Then
            MsgBox("We have a winner!")
        Else
            MsgBox(Language & " is not a bad language.")
        End If

    End Sub
End Class
Partial Public Class Form1
    Inherits System.Windows.Forms.Form

    <System.Diagnostics.DebuggerNonUserCode()> _
    Public Sub New()
        MyBase.New()

        'This call is required by the Windows Form Designer.
        InitializeComponent()

    End Sub

    'Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overloads 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.Button1 = New System.Windows.Forms.Button
        Me.ComboBox1 = New System.Windows.Forms.ComboBox
        Me.SuspendLayout()
        '
        'Label1
        '
        Me.Label1.AutoSize = True
        Me.Label1.Location = New System.Drawing.Point(13, 22)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(160, 14)
        Me.Label1.TabIndex = 0
        Me.Label1.Text = "What's your favorite language?"
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(13, 70)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(267, 23)
        Me.Button1.TabIndex = 2
        Me.Button1.Text = "Evaluate my choice"
        '
        'ComboBox1
        '
        Me.ComboBox1.FormattingEnabled = True
        Me.ComboBox1.Items.AddRange(New Object() {"C++", "C#", "Java", "Visual Basic", "Cobol"})
        Me.ComboBox1.Location = New System.Drawing.Point(13, 43)
        Me.ComboBox1.Name = "ComboBox1"
        Me.ComboBox1.Size = New System.Drawing.Size(267, 21)
        Me.ComboBox1.TabIndex = 1
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(292, 117)
        Me.Controls.Add(Me.ComboBox1)
        Me.Controls.Add(Me.Button1)
        Me.Controls.Add(Me.Label1)
        Me.Name = "Form1"
        Me.Text = "Form1"
        Me.ResumeLayout(False)
        Me.PerformLayout()

    End Sub
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents ComboBox1 As System.Windows.Forms.ComboBox

End Class