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

定义

发生时ListView是范围内的项的状态已更改的虚拟模式和所选内容中。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将此成员。The following code example demonstrates the use of this member. 在示例中,事件处理程序报告的匹配项VirtualItemsSelectionRangeChanged事件。In the example, an event handler reports on the occurrence of the VirtualItemsSelectionRangeChanged event. 此报告可帮助您了解事件发生的并可以帮助您进行调试。This report helps you to learn when the event occurs and can assist you in debugging. 若要报告或频繁发生的事件上多个事件,请考虑更换MessageBox.ShowConsole.WriteLine或将消息附加到多行TextBoxTo 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.

若要运行此代码示例,请将其粘贴到包含类型的实例的项目ListView名为ListView1To run the example code, paste it into a project that contains an instance of type ListView named ListView1. 然后,确保事件处理程序相关联VirtualItemsSelectionRangeChanged事件。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ListView未处于虚拟模式下,ItemSelectionChanged事件发生一次。If 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