ItemChangedEventArgs 类

定义

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

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

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. 在此示例中, 事件处理程序报告ItemChanged事件的发生。In the example, an event handler reports on the occurrence of the ItemChanged 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 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CurrencyManager CurrencyManager1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 CurrencyManager named CurrencyManager1. 然后, 确保事件处理程序与ItemChanged事件相关联。Then ensure that the event handler is associated with the ItemChanged event.

private void CurrencyManager1_ItemChanged(Object sender, ItemChangedEventArgs e) {

System.Text.StringBuilder messageBoxCS = new System.Text.StringBuilder();
messageBoxCS.AppendFormat("{0} = {1}", "Index", e.Index );
messageBoxCS.AppendLine();
MessageBox.Show(messageBoxCS.ToString(), "ItemChanged Event" );
}
Private Sub CurrencyManager1_ItemChanged(sender as Object, e as ItemChangedEventArgs) _ 
     Handles CurrencyManager1.ItemChanged

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

End Sub

注解

ItemChanged列表中的项发生更改时, 将发生事件。An ItemChanged event occurs whenever the item in a list is changed. 例如, 当列表项的文本更改为新值时, 将发生此事件。For example, this event will occur when the text of the list item is changed to a new value. 由于要添加新项, 将项移动到列表中的新位置时, 不会引发此事件。This event is not raised when the item is moved to a new position within the list because of a new item being added.

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.

属性

Index

指示列表中更改项的位置。Indicates the position of the item being changed within the list.

方法

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.

(继承自 Object)
GetHashCode()

用作默认哈希函数。Serves as the default hash function.

(继承自 Object)
GetType()

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

(继承自 Object)
MemberwiseClone()

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

(继承自 Object)
ToString()

返回一个表示当前对象的 string。Returns a string that represents the current object.

(继承自 Object)

适用于

另请参阅