RetrieveVirtualItemEventArgs RetrieveVirtualItemEventArgs RetrieveVirtualItemEventArgs RetrieveVirtualItemEventArgs Class


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

public ref class RetrieveVirtualItemEventArgs : EventArgs
public class RetrieveVirtualItemEventArgs : EventArgs
type RetrieveVirtualItemEventArgs = class
    inherit EventArgs
Public Class RetrieveVirtualItemEventArgs
Inherits EventArgs


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RetrieveVirtualItem事件。In the example, an event handler reports on the occurrence of the RetrieveVirtualItem 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RetrieveVirtualItem事件。Then ensure that the event handler is associated with the RetrieveVirtualItem event.

private void ListView1_RetrieveVirtualItem(Object sender, RetrieveVirtualItemEventArgs e) {

System.Text.StringBuilder messageBoxCS = new System.Text.StringBuilder();
messageBoxCS.AppendFormat("{0} = {1}", "ItemIndex", e.ItemIndex );
messageBoxCS.AppendFormat("{0} = {1}", "Item", e.Item );
MessageBox.Show(messageBoxCS.ToString(), "RetrieveVirtualItem Event" );
Private Sub ListView1_RetrieveVirtualItem(sender as Object, e as RetrieveVirtualItemEventArgs) _ 
     Handles ListView1.RetrieveVirtualItem

    Dim messageBoxVB as New System.Text.StringBuilder()
    messageBoxVB.AppendFormat("{0} = {1}", "ItemIndex", e.ItemIndex)
    messageBoxVB.AppendFormat("{0} = {1}", "Item", e.Item)
    MessageBox.Show(messageBoxVB.ToString(),"RetrieveVirtualItem Event")

End Sub


RetrieveVirtualItemEventArgs(Int32) RetrieveVirtualItemEventArgs(Int32) RetrieveVirtualItemEventArgs(Int32) RetrieveVirtualItemEventArgs(Int32)

初始化 RetrieveVirtualItemEventArgs 类的新实例。Initializes a new instance of the RetrieveVirtualItemEventArgs class.


Item Item Item Item

获取或设置从缓存中检索的项。Gets or sets the item retrieved from the cache.

ItemIndex ItemIndex ItemIndex ItemIndex

获取要从缓存中检索的项的索引。Gets the index of the item to retrieve from the cache.


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)