Export (0) Print
Expand All

ComboBox::SelectionChangeCommitted Event

Occurs when the selected item has changed and that change is displayed in the ComboBox.

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

public:
 event EventHandler^ SelectionChangeCommitted {
	void add (EventHandler^ value);
	void remove (EventHandler^ value);
}

SelectionChangeCommitted is raised only when the user changes the combo box selection. Do not use SelectedIndexChanged or SelectedValueChanged to capture user changes, because those events are also raised when the selection changes programmatically.

You can create a SelectionChangeCommitted event handler to provide special handling for the ComboBox when the user changes the selected item in the list.

For more information about handling events, see Handling and Raising Events.

The following code example uses the SelectionChangeCommitted event and the SelectionLength property to change the length of the text box depending on what the user has selected and committed.

   void comboBox1_SelectionChangeCommitted( Object^ sender, EventArgs^ /*e*/ )
   {
      ComboBox^ senderComboBox = dynamic_cast<ComboBox^>(sender);

      // Change the length of the text box depending on what the user has  
      // selected and committed using the SelectionLength property. 
      if ( senderComboBox->SelectionLength > 0 )
      {
		  textbox1->Width = 
			  senderComboBox->SelectedItem->ToString()->Length * 
			  ((int)this->textbox1->Font->SizeInPoints);
		  textbox1->Text = senderComboBox->SelectedItem->ToString();				
      }
   }

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Show:
© 2014 Microsoft