C# Updatepanel 中用户控件内按钮的回发触发器
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Postback trigger for button inside a usercontrol in Updatepanel
提问by Mahesh KP
I have a user control placed inside an update panel, ie like this.
我有一个用户控件放置在更新面板内，即像这样。
<asp:UpdatePanel ID="testupdatepnl" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<uc1:TestControl ID="ctlTest" runat="server" />
</ContentTemplate>
</asp:UpdatePanel>
Now i got a button placed inside this user control say Click. I want to postback the whole page on the button click. I tried to add a postback trigger like this
现在我在这个用户控件中放置了一个按钮，比如 Click。我想在单击按钮时回发整个页面。我尝试添加这样的回发触发器
<Triggers>
<asp:PostBackTrigger ControlID="clickButton" />
</Triggers>
Since the button is inside the usercontrol , i got error while running like this.
由于按钮位于用户控件内，因此在运行时出现错误。
Is there any way to do a postback for this button.
有什么办法可以为这个按钮做一个回发。
回答by Imran Rizvi
Because button you are using as trigger is placed inside update panel and after render its client id gets changed.
因为您用作触发器的按钮放置在更新面板内，并且在渲染后其客户端 ID 会更改。
Make the button accessable from user control and declare the trigger at server side e.g.
使按钮可从用户控件访问并在服务器端声明触发器，例如
var ClickButton= ctlTest.FindControl("clickButton") as Button;
var trigger = new PostBackTrigger();
trigger.ControlID = ClickButton.UniqueID.ToString();
testupdatepnl.Triggers.Add(trigger);
See the following thread for more details Trigger a button inside a UpdatePanel with a LoginView
有关更多详细信息，请参阅以下线程 使用 LoginView 触发 UpdatePanel 内的按钮
回答by Nalaka526
回答by nelson
You should also note that if you are using Ajax Control Toolkit. You can replace ScriptManager to ToolkitScriptManager.
您还应该注意，如果您使用的是 Ajax Control Toolkit。您可以将 ScriptManager 替换为 ToolkitScriptManager。
Dim btn As Button = CType(UserControl.FindControl("ButtonID"), Button)
AjaxControlToolkit.ToolkitScriptManager.GetCurrent(Page).RegisterPostBackControl(btn)
