分配一个事件自定义控件Repeater控件内 [英] Assign an event to a custom control inside a Repeater control

问题描述

我有它的一些细胞包含其中包含一个DropDownList一个用户控件Repeater控件。在Repeater控件的ItemDataBound事件，我像这样分配一个事件DropDownList的：

I have a Repeater control which in some of its cells contains a UserControl which contains a DropDownList. On the ItemDataBound event of the Repeater control I'm assigning an event to the DropDownList like so:

protected void MyRepeater_ItemDataBound(object sender, RepeaterItemEventArgs e)  
{  
...  
MyControl myControl = (MyControl)e.Item.FindControl("MyControl01");  
myControl.DataSource = myObject;  
myControl.DataBind();  
myControl.DropDownList.SelectedItemChange += MyMethod_SelectedIndexChanged;  
myControl.DropDownList.AutoPostBack = true;  
....  
}  

protected void MyMethod_SelectedIndexChanged(object sender, EventArgs e)  
{  
//Do something.  
}

该事件永远不会触发。请我需要帮助。

The event never fires. Please I need help.

推荐答案

您事件不被在回发提出，因为你的事件处理程序尚未连接（它只是在页面生命周期的迭代过程中附着当你中继器数据绑定）。

Your event is not being raised in a PostBack because your event handler has not been attached (it is only attached during the iteration of the page life-cycle when your repeater is databound).

如果您声明附上您的事件处理程序的标记，如：

If you attach your event handler declaratively in the markup such as:

<asp:Repeater ID="Repeater1" runat="server">
     <ItemTemplate>
         <asp:DropDownList ID="DropDownList1" runat="server" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged" />
    </ItemTemplate>
</asp:Repeater>

那么你的事件处理程序将回送过程中被调用。

Then your event handler will be called during PostBacks.

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