Full postback triggered by LinkButton inside GridView inside UpdatePanel

Question

I have a GridView inside of a UpdatePanel. In a template field is a button I use for marking items. Functionally, this works fine, but the button always triggers a full page

Answer 1

I had an issue where I had one form working fine (page1), another doing whole post backs (page2). Turned out when I made the 2nd page, I had done a bit too much cut/paste, and it still had a javascript call in the form definition.

< form id="form1" runat="server" onsubmit="return checkstuff();">

But checkstuff was not defined in page 2.

deleted the onsubmit, and the partial posts started working.

In the working page - page 1, checkstuff was defined, but was just a stub, which did nothing more than return true. Just for grins, I put an alert in checkstuff, and sure enough, it is called for all submits, partial or not. And, if I changed the stub to just return false, nothing happened at all.

Point in all this, the javascript is still exercised, as if a full page is being submitted. So double check your client side scripts.

Answer 2

this may be old but my solution was to put an update panel inside the itemTemplate and one outside the gridview as well.

the trigger should be the gridview and the outside trigger should be the gridview and PageIndexChanging. Try that.

Answer 3

MSDN specifies that the UpdatePanel.ChildrenAsTriggers property "[g]ets or sets a value that indicates whether postbacks from immediate child controls of an UpdatePanel control update the panel's content" (see http://msdn.microsoft.com/en-us/library/system.web.ui.updatepanel.childrenastriggers.aspx).

Since your LinkButton does not appear to be an "immediate child control," then I would recommend configuring your LinkButton as an explicit AsyncPostBackTrigger.

Below your </ContentTemplate> tag, try adding this:

<Triggers>
  <asp:AsyncPostBackTrigger ControlID="MarkAsCompleteButton" EventName="Click" />
</Triggers>

Answer 4

It's probably not advised but you can make everything on the GridView work asynchronously by excluding the EventName on the AsyncPostBackTrigger so e.g.

<Triggers>
  <asp:AsyncPostBackTrigger ControlID="OrderGrid" />
</Triggers>

This will make the RowCommand event and any other event on the GridView fire asynchronously. Note as well that when you make ClientIDMode="Static" on the GridView it will cause a full postback.

Answer 5

Put the following element inside system.web element in web.config file

<xhtmlConformance mode="Transitional"/>

Answer 6

My grid view is in conditional mode.

protected void gvAgendamentoExclui_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow) {
            LinkButton lnk = e.Row.FindControl("LinkButton2") as LinkButton;
            AsyncPostBackTrigger trigger = new AsyncPostBackTrigger();
            trigger.ControlID = lnk.UniqueID;
            trigger.EventName = "Click";
            UpdatePanel2.Triggers.Add(trigger);

        }
    }

And in the click event of the linkbutton I put:

protected void LinkButton2_Click(object sender, EventArgs e)
    {
        UpdatePanel2.Update();
    }