如何处理aspx页面中的动态用户控件事件

发布于 2024-09-29 10:44:06 字数 532 浏览 0 评论 0原文

我有一个 aspx 网页，其中动态添加用户控件，如下所示：

UserControl testUsrControl = LoadControl("TestUsrControl") as UserControl;
testUsrControl.ID ="test";

然后我尝试在 aspx 内添加用户控件的事件处理程序，如下所示：

testUsrControl.Drpdatafield_SelectIndexChanged += new EventHandler(this.Drpdatafield_SelectIndexChanged);

但此行在 **testUsrControl.Drpdatafield_SelectIndexChanged ** 处给出错误。错误是“Drpdatafield_SelectIndexChanged”在 UserControl 中不存在。

如何动态获取aspx页面内testUsrControl的事件。

谢谢，色法

原文

I have an aspx webpage in which an user control is added dynamically as follows:

UserControl testUsrControl = LoadControl("TestUsrControl") as UserControl;
testUsrControl.ID ="test";

Then I tried adding an event handler of user control inside aspx like below:

testUsrControl.Drpdatafield_SelectIndexChanged += new EventHandler(this.Drpdatafield_SelectIndexChanged);

But this line is giving error at **testUsrControl.Drpdatafield_SelectIndexChanged **. The error is "Drpdatafield_SelectIndexChanged" doesn't exist in UserControl.

How can get the testUsrControl's events inside aspx page dynamically.

Thanks,
Rupa

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厌味 2024-10-06 10:44:06

您需要将控件转换为正确的类型（例如 MyUserControlType），然后验证它是否正常

MyUserControlType testUsrControl = LoadControl("TestUsrControl") as MyUserControlType;
if(testUsrControl != null {
          testUsrControl.Drpdatafield_SelectIndexChanged += new EventHandler(this.Drpdatafield_SelectIndexChanged)
}

您从用户控件标记文件中的 ClassName 获取类型
<% @ Control Language="C#" ClassName="MyUserControlType" %>

You need to cast the control to the correct type (say MyUserControlType) and then verify that it's ok

MyUserControlType testUsrControl = LoadControl("TestUsrControl") as MyUserControlType;
if(testUsrControl != null {
          testUsrControl.Drpdatafield_SelectIndexChanged += new EventHandler(this.Drpdatafield_SelectIndexChanged)
}

You get the type from ClassName in the usercontrol markup file
<% @ Control Language="C#" ClassName="MyUserControlType" %>

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