ansaurus

Question

Can I trigger an Update Panel from a Drop Down list in a User Control

Answer 1

+2 A:

Hi,

If you want to update the panel via the User Control you've created, you could try setting the UpdatePanel's UpdateMode = Conditional. Then, in your User Control's click event (or whichever event), have something like this:

 UpdatePanel mUpdatePanel = this.Page.Master.FindControl("upContent") as UpdatePanel;  
    if (mUpdatePanel != null)  
    {
        mUpdatePanel.Update();  
    }
    else
    {
         //update panel not found
    }

UPDATE

Since you can't access your triggers declaratively, you could add them from the code-behind. On your content page, add something like this:

 AsyncPostBackTrigger triggerUserControl = new AsyncPostBackTrigger();
                        DropDownList ucDDL = this.Page.Master.FindControl("ddlDesiredPage") as DropDownList;
                        triggerUserControl.ControlID = ucDDL.ID;
                        triggerUserControl.EventName = "Click";

                        UpdatePanel1.Triggers.Add(triggerUserControl);

Do the same for the other DropDownList. I haven't tried this, but it seems reasonable.

keyboardP 2010-03-23 19:53:31

Ok I see what your doing and I think it's close to what I need. The layout is switched around though. My user control is on the master page, and my updatepanel is in the web content page.

Jisaak 2010-03-23 20:27:03

In that case, in your MasterPage code-behind (For the user control event), you could try:`UpdatePanel mUpdatePanel = ContentPlaceHolder1.FindControl("upContent") as UpdatePanel`

keyboardP 2010-03-23 20:53:55

I've updated my answer based on your code.

keyboardP 2010-03-23 22:58:54

Answer 2

+1 A:

Try adding a postback trigger to your UpdatePanel:

<Triggers>
    <asp:PostBackTrigger ControlID="ddl..." />
</Triggers>

Dug 2010-03-23 20:19:55

Right, but how do i find the ddl if its in a user control on my master page?

Jisaak 2010-03-23 20:29:34

ansaurus

tags:

views:

answers:

Can I trigger an Update Panel from a Drop Down list in a User Control

related questions