.NET Framework Class Library
ComboBox..::.Text Property

Updated: April 2009

Gets or sets the text associated with this control.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)
Syntax

Visual Basic (Declaration)
<BindableAttribute(True)> _
Public Overrides Property Text As String
Visual Basic (Usage)
Dim instance As ComboBox
Dim value As String

value = instance.Text

instance.Text = value
C#
[BindableAttribute(true)]
public override string Text { get; set; }
Visual C++
[BindableAttribute(true)]
public:
virtual property String^ Text {
    String^ get () override;
    void set (String^ value) override;
}
JScript
public override function get Text () : String
public override function set Text (value : String)

Property Value

Type: System..::.String
The text associated with this control.
Remarks

Setting the Text property to nullNothingnullptra null reference (Nothing in Visual Basic) or an empty string ("") sets the SelectedIndex to -1. Setting the Text property to a value that is in the Items collection sets the SelectedIndex to the index of that item. Setting the Text property to a value that is not in the collection leaves the SelectedIndex unchanged.

Examples

The following code example demonstrates how to initialize a ComboBox control by setting the Text property and using the AddRange method to populate the ComboBox. It also demonstrates handling the DropDown event. To run the example, paste the following code in a form and call the InitializeComboBox method in the form's constructor or Load event.

Visual Basic
' 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
C#
    // Declare ComboBox1.
    internal System.Windows.Forms.ComboBox ComboBox1;

    // Initialize ComboBox1.
    private void InitializeComboBox()
    {
        this.ComboBox1 = new ComboBox();
        this.ComboBox1.Location = new System.Drawing.Point(128, 48);
        this.ComboBox1.Name = "ComboBox1";
        this.ComboBox1.Size = new System.Drawing.Size(100, 21);
        this.ComboBox1.TabIndex = 0;
        this.ComboBox1.Text    = "Typical";
        string[] installs = new string[]{"Typical", "Compact", "Custom"};
        ComboBox1.Items.AddRange(installs);
        this.Controls.Add(this.ComboBox1);
        
        // Hook up the event handler.
        this.ComboBox1.DropDown +=  
            new System.EventHandler(ComboBox1_DropDown);
    }

    // Handles the ComboBox1 DropDown event. If the user expands the  
    // drop-down box, a message box will appear, recommending the
    // typical installation.
    private void ComboBox1_DropDown(object sender, System.EventArgs e)
    {
        MessageBox.Show("Typical installation is strongly recommended.", 
        "Install information", MessageBoxButtons.OK, 
            MessageBoxIcon.Information);
    }
Visual C++
internal:
   // Declare ComboBox1
   System::Windows::Forms::ComboBox^ ComboBox1;

private:
   // Initialize ComboBox1.
   void InitializeComboBox()
   {
      this->ComboBox1 = gcnew ComboBox;
      this->ComboBox1->Location = System::Drawing::Point( 128, 48 );
      this->ComboBox1->Name = "ComboBox1";
      this->ComboBox1->Size = System::Drawing::Size( 100, 21 );
      this->ComboBox1->TabIndex = 0;
      this->ComboBox1->Text = "Typical";
      array<String^>^ installs = {"Typical","Compact","Custom"};
      ComboBox1->Items->AddRange( installs );
      this->Controls->Add( this->ComboBox1 );

      // Hook up the event handler.
      this->ComboBox1->DropDown += gcnew System::EventHandler(
         this, &Form1::ComboBox1_DropDown );
   }

   // Handles the ComboBox1 DropDown event. If the user expands the  
   // drop-down box, a message box will appear, recommending the
   // typical installation.
   void ComboBox1_DropDown( Object^ sender, System::EventArgs^ e )
   {
      MessageBox::Show( "Typical installation is strongly recommended.",
         "Install information", MessageBoxButtons::OK,
         MessageBoxIcon::Information );
   }
Platforms

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
Version Information

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0
See Also

Reference

Change History

Date

History

Reason

April 2009

Provided additional explanation about the effects of setting this property.

Customer feedback.

Tags :


Page view tracker