C# 扩展DataList以从LinkButtons接受新的InsertCommand
我正在尝试将DataList子类化,以接受来自嵌入式LinkButtons的新命令。这是我的抽象类:C# 扩展DataList以从LinkButtons接受新的InsertCommand,c#,insert,datalist,linkbutton,event-handling,C#,Insert,Datalist,Linkbutton,Event Handling,我正在尝试将DataList子类化,以接受来自嵌入式LinkButtons的新命令。这是我的抽象类: public abstract class BaseFieldGroup : DataList { public const string InsertCommandName = "Insert"; public event DataListCommandEventHandler InsertCommand { add {
public abstract class BaseFieldGroup : DataList
{
public const string InsertCommandName = "Insert";
public event DataListCommandEventHandler InsertCommand
{
add
{
base.Events.AddHandler(EventInsertCommand, value);
}
remove
{
base.Events.RemoveHandler(EventInsertCommand, value);
}
}
private static readonly object EventInsertCommand;
static BaseFieldGroup()
{
EventInsertCommand = new object();
}
protected virtual void OnInsertCommand(DataListCommandEventArgs e)
{
DataListCommandEventHandler handler = (DataListCommandEventHandler)base.Events[EventInsertCommand];
if (handler != null)
{
handler(this, e);
}
}
}
这似乎是对的,但这件事没有被抓住;我不知道为什么。然而,我也注意到LinkButton发送了一个带有RaiseBubble的偶数,我不知道这是否是一个问题。有人有想法吗
哦,这是2.0啊哈!发现并固定;我必须重写DataList的OnBubbleEvent以适应新命令的调用。见下文:
public abstract class BaseFieldGroup : DataList
{
...
protected override bool OnBubbleEvent(object source, EventArgs e)
{
bool flag = false;
if (e is DataListCommandEventArgs)
{
DataListCommandEventArgs args = (DataListCommandEventArgs)e;
this.OnItemCommand(args);
flag = true;
switch (args.CommandName)
{
case SelectCommandName:
this.SelectedIndex = args.Item.ItemIndex;
this.OnSelectedIndexChanged(EventArgs.Empty);
return flag;
case EditCommandName:
this.OnEditCommand(args);
return flag;
case DeleteCommandName:
this.OnDeleteCommand(args);
return flag;
case UpdateCommandName:
this.OnUpdateCommand(args);
return flag;
case CancelCommandName:
this.OnCancelCommand(args);
return flag; //??
case InsertCommandName:
this.OnInsertCommand(args);
return flag;
}
}
return flag;
}