ListView.VirtualItemsSelectionRangeChanged ListView.VirtualItemsSelectionRangeChanged ListView.VirtualItemsSelectionRangeChanged ListView.VirtualItemsSelectionRangeChanged Event

定义

ListView 处于虚拟模式下且某个范围内的项的选定状态发生更改时发生。Occurs when a ListView is in virtual mode and the selection state of a range of items has changed.

public:
 event System::Windows::Forms::ListViewVirtualItemsSelectionRangeChangedEventHandler ^ VirtualItemsSelectionRangeChanged;
public event System.Windows.Forms.ListViewVirtualItemsSelectionRangeChangedEventHandler VirtualItemsSelectionRangeChanged;
member this.VirtualItemsSelectionRangeChanged : System.Windows.Forms.ListViewVirtualItemsSelectionRangeChangedEventHandler 
Public Custom Event VirtualItemsSelectionRangeChanged As ListViewVirtualItemsSelectionRangeChangedEventHandler 

示例

下面的代码示例演示如何使用此成员。The following code example demonstrates the use of this member. 在此示例中, 事件处理程序报告VirtualItemsSelectionRangeChanged事件的发生。In the example, an event handler reports on the occurrence of the VirtualItemsSelectionRangeChanged event. 此报表可帮助你了解何时发生事件, 并可帮助你进行调试。This report helps you to learn when the event occurs and can assist you in debugging. 若要报告多个事件或频繁发生的事件, 请考虑MessageBox.ShowConsole.WriteLine消息替换为多行或将TextBox其追加到多行。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.

若要运行示例代码, 请将其粘贴到包含名为ListView ListView1的类型的实例的项目中。To run the example code, paste it into a project that contains an instance of type ListView named ListView1. 然后, 确保事件处理程序与VirtualItemsSelectionRangeChanged事件相关联。Then ensure that the event handler is associated with the VirtualItemsSelectionRangeChanged event.

private void ListView1_VirtualItemsSelectionRangeChanged(Object sender, ListViewVirtualItemsSelectionRangeChangedEventArgs e) {

System.Text.StringBuilder messageBoxCS = new System.Text.StringBuilder();
messageBoxCS.AppendFormat("{0} = {1}", "EndIndex", e.EndIndex );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "IsSelected", e.IsSelected );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "StartIndex", e.StartIndex );
messageBoxCS.AppendLine();
MessageBox.Show(messageBoxCS.ToString(), "VirtualItemsSelectionRangeChanged Event" );
}
Private Sub ListView1_VirtualItemsSelectionRangeChanged(sender as Object, e as ListViewVirtualItemsSelectionRangeChangedEventArgs) _ 
     Handles ListView1.VirtualItemsSelectionRangeChanged

    Dim messageBoxVB as New System.Text.StringBuilder()
    messageBoxVB.AppendFormat("{0} = {1}", "EndIndex", e.EndIndex)
    messageBoxVB.AppendLine()
    messageBoxVB.AppendFormat("{0} = {1}", "IsSelected", e.IsSelected)
    messageBoxVB.AppendLine()
    messageBoxVB.AppendFormat("{0} = {1}", "StartIndex", e.StartIndex)
    messageBoxVB.AppendLine()
    MessageBox.Show(messageBoxVB.ToString(),"VirtualItemsSelectionRangeChanged Event")

End Sub

注解

如果不在虚拟模式下ItemSelectionChanged ,则将发生事件。 ListViewIf the ListView is not in virtual mode, the ItemSelectionChanged event will occur.

有关处理事件的详细信息, 请参阅处理和引发事件For more information about handling events, see Handling and Raising Events.

适用于

另请参阅