ScrollEventArgs.Type 属性

定义

获取所发生的滚动事件的类型。Gets the type of scroll event that occurred.

public:
 property System::Windows::Forms::ScrollEventType Type { System::Windows::Forms::ScrollEventType get(); };
public System.Windows.Forms.ScrollEventType Type { get; }
member this.Type : System.Windows.Forms.ScrollEventType
Public ReadOnly Property Type As ScrollEventType

属性值

ScrollEventType 值之一。One of the ScrollEventType values.

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 ScrollableControl.Scroll 事件的发生。In the example, an event handler reports on the occurrence of the ScrollableControl.Scroll 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,请考虑将 MessageBox.Show 替换为 Console.WriteLine 或将消息附加到多行 TextBox中。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,请将其粘贴到一个项目中,该项目包含继承自 ScrollableControl的类型的实例,如 PanelContainerControlTo run the example code, paste it into a project that contains an instance of a type that inherits from ScrollableControl, such as a Panel or ContainerControl. 然后,将该实例命名为 ScrollableControl1 并确保事件处理程序与 ScrollableControl.Scroll 事件关联。Then name the instance ScrollableControl1 and ensure that the event handler is associated with the ScrollableControl.Scroll event.

private void ScrollableControl1_Scroll(Object sender, ScrollEventArgs e) {

System.Text.StringBuilder messageBoxCS = new System.Text.StringBuilder();
messageBoxCS.AppendFormat("{0} = {1}", "ScrollOrientation", e.ScrollOrientation );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "Type", e.Type );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "NewValue", e.NewValue );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "OldValue", e.OldValue );
messageBoxCS.AppendLine();
MessageBox.Show(messageBoxCS.ToString(), "Scroll Event" );
}
Private Sub ScrollableControl1_Scroll(sender as Object, e as ScrollEventArgs) _ 
     Handles ScrollableControl1.Scroll

    Dim messageBoxVB as New System.Text.StringBuilder()
    messageBoxVB.AppendFormat("{0} = {1}", "ScrollOrientation", e.ScrollOrientation)
    messageBoxVB.AppendLine()
    messageBoxVB.AppendFormat("{0} = {1}", "Type", e.Type)
    messageBoxVB.AppendLine()
    messageBoxVB.AppendFormat("{0} = {1}", "NewValue", e.NewValue)
    messageBoxVB.AppendLine()
    messageBoxVB.AppendFormat("{0} = {1}", "OldValue", e.OldValue)
    messageBoxVB.AppendLine()
    MessageBox.Show(messageBoxVB.ToString(),"Scroll Event")

End Sub

适用于

另请参阅