Postback trigger for button inside a usercontrol in Updatepanel

问题

I have a user control placed inside an update panel, ie like this.

<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

<Triggers>
    <asp:PostBackTrigger ControlID="clickButton" />
</Triggers>

Since the button is inside the usercontrol , i got error while running like this.

Is there any way to do a postback for this button.

回答1:

Remove the <Triggers> from HTML & Add this to PageLoad event

ScriptManager scriptManager = ScriptManager.GetCurrent(this.Page);
scriptManager.RegisterPostBackControl(WebUserControl11.FindControl("ButtonId")); 

Note : Learned from this

回答2:

Because button you are using as trigger is placed inside update panel and after render its client id gets changed.

Make the button accessable from user control and declare the trigger at server side e.g.

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

回答3:

You should also note that if you are using Ajax Control Toolkit. You can replace ScriptManager to ToolkitScriptManager.

Dim btn As Button = CType(UserControl.FindControl("ButtonID"), Button)        
AjaxControlToolkit.ToolkitScriptManager.GetCurrent(Page).RegisterPostBackControl(btn)

来源：https://stackoverflow.com/questions/10577474/postback-trigger-for-button-inside-a-usercontrol-in-updatepanel