CacheVirtualItemsEventArgs CacheVirtualItemsEventArgs CacheVirtualItemsEventArgs CacheVirtualItemsEventArgs Class

定义

CacheVirtualItems 事件提供数据。Provides data for the CacheVirtualItems event.

public ref class CacheVirtualItemsEventArgs : EventArgs
public class CacheVirtualItemsEventArgs : EventArgs
type CacheVirtualItemsEventArgs = class
    inherit EventArgs
Public Class CacheVirtualItemsEventArgs
Inherits EventArgs
继承
CacheVirtualItemsEventArgsCacheVirtualItemsEventArgsCacheVirtualItemsEventArgsCacheVirtualItemsEventArgs

示例

下面的代码示例演示如何使用此类型。The following code example demonstrates the use of this type. 在示例中,事件处理程序报告的匹配项CacheVirtualItems事件。In the example, an event handler reports on the occurrence of the CacheVirtualItems 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ShowConsole.WriteLine或将消息附加到多行TextBoxTo report on multiple events or on events that occur frequently, consider replacing 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CacheVirtualItems事件。Then ensure that the event handler is associated with the CacheVirtualItems event.

private void ListView1_CacheVirtualItems(Object sender, CacheVirtualItemsEventArgs e) {

System.Text.StringBuilder messageBoxCS = new System.Text.StringBuilder();
messageBoxCS.AppendFormat("{0} = {1}", "StartIndex", e.StartIndex );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "EndIndex", e.EndIndex );
messageBoxCS.AppendLine();
MessageBox.Show(messageBoxCS.ToString(), "CacheVirtualItems Event" );
}
Private Sub ListView1_CacheVirtualItems(sender as Object, e as CacheVirtualItemsEventArgs) _ 
     Handles ListView1.CacheVirtualItems

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

End Sub

注解

CacheVirtualItems事件发生时的一个新区域ListView公开处于虚拟模式下和ListView确定需要的项的新范围。The CacheVirtualItems event occurs when a new area of a ListView in virtual mode is exposed and the ListView determines a new range of items is needed.

构造函数

CacheVirtualItemsEventArgs(Int32, Int32) CacheVirtualItemsEventArgs(Int32, Int32) CacheVirtualItemsEventArgs(Int32, Int32) CacheVirtualItemsEventArgs(Int32, Int32)

使用指定的起始索引和结束索引初始化 CacheVirtualItemsEventArgs 类的新实例。Initializes a new instance of the CacheVirtualItemsEventArgs class with the specified starting and ending indices.

属性

EndIndex EndIndex EndIndex EndIndex

获取处于虚拟模式的 ListView 控件所需的一组值的结束索引。Gets the ending index for the range of values needed by a ListView control in virtual mode.

StartIndex StartIndex StartIndex StartIndex

获取处于虚拟模式的 ListView 控件所需的一组值的起始索引。Gets the starting index for a range of values needed by a ListView control in virtual mode.

方法

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

确定指定的对象是否等于当前对象。Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetHashCode() GetHashCode() GetHashCode() GetHashCode()

作为默认哈希函数。Serves as the default hash function.

(Inherited from Object)
GetType() GetType() GetType() GetType()

获取当前实例的 TypeGets the Type of the current instance.

(Inherited from Object)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

创建当前 Object 的浅表副本。Creates a shallow copy of the current Object.

(Inherited from Object)
ToString() ToString() ToString() ToString()

返回表示当前对象的字符串。Returns a string that represents the current object.

(Inherited from Object)

适用于