CheckedListBox.ItemCheck Event
Occurs when the checked state of an item changes.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
The following code example demonstrates the use of this member. In the example, an event handler reports on the occurrence of the ItemCheck event. This report helps you to learn when the event occurs and can assist you in debugging. To report on multiple events or on events that occur frequently, consider replacing MessageBox.Show with Console.WriteLine or appending the message to a multiline TextBox.
To run the example code, paste it into a project that contains an instance of type CheckedListBox named CheckedListBox1. Then ensure that the event handler is associated with the ItemCheck event.
Private Sub CheckedListBox1_ItemCheck(sender as Object, e as ItemCheckEventArgs) _ Handles CheckedListBox1.ItemCheck Dim messageBoxVB as New System.Text.StringBuilder() messageBoxVB.AppendFormat("{0} = {1}", "Index", e.Index) messageBoxVB.AppendLine() messageBoxVB.AppendFormat("{0} = {1}", "NewValue", e.NewValue) messageBoxVB.AppendLine() messageBoxVB.AppendFormat("{0} = {1}", "CurrentValue", e.CurrentValue) messageBoxVB.AppendLine() MessageBox.Show(messageBoxVB.ToString(),"ItemCheck Event") End Sub
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
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.