ListControlConvertEventArgs ListControlConvertEventArgs ListControlConvertEventArgs ListControlConvertEventArgs Class

定义

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

public ref class ListControlConvertEventArgs : System::Windows::Forms::ConvertEventArgs
public class ListControlConvertEventArgs : System.Windows.Forms.ConvertEventArgs
type ListControlConvertEventArgs = class
    inherit ConvertEventArgs
Public Class ListControlConvertEventArgs
Inherits ConvertEventArgs
继承
ListControlConvertEventArgsListControlConvertEventArgsListControlConvertEventArgsListControlConvertEventArgs

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Format事件的发生。In the example, an event handler reports on the occurrence of the Format 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, 请将其粘贴到一个项目中, 该项目包含从ListControl继承的类型的实例, 如ListBox ComboBox或。To run the example code, paste it into a project that contains an instance of a type that inherits from ListControl, such as a ComboBox or ListBox. 然后命名该实例ListControl1 , 并确保事件处理程序Format与事件相关联。Then name the instance ListControl1 and ensure that the event handler is associated with the Format event.

private void ListControl1_Format(Object sender, ListControlConvertEventArgs e) {

System.Text.StringBuilder messageBoxCS = new System.Text.StringBuilder();
messageBoxCS.AppendFormat("{0} = {1}", "ListItem", e.ListItem );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "Value", e.Value );
messageBoxCS.AppendLine();
messageBoxCS.AppendFormat("{0} = {1}", "DesiredType", e.DesiredType );
messageBoxCS.AppendLine();
MessageBox.Show(messageBoxCS.ToString(), "Format Event" );
}
Private Sub ListControl1_Format(sender as Object, e as ListControlConvertEventArgs) _ 
     Handles ListControl1.Format

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

End Sub

构造函数

ListControlConvertEventArgs(Object, Type, Object) ListControlConvertEventArgs(Object, Type, Object) ListControlConvertEventArgs(Object, Type, Object) ListControlConvertEventArgs(Object, Type, Object)

用指定的对象、类型和列表项初始化 ListControlConvertEventArgs 的新实例。Initializes a new instance of the ListControlConvertEventArgs class with the specified object, type, and list item.

属性

DesiredType DesiredType DesiredType DesiredType

获取所需值的数据类型。Gets the data type of the desired value.

(Inherited from ConvertEventArgs)
ListItem ListItem ListItem ListItem

获取数据源项。Gets a data source item.

Value Value Value Value

获取或设置 ConvertEventArgs 的值。Gets or sets the value of the ConvertEventArgs.

(Inherited from ConvertEventArgs)

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