PostBack is happening even after using Update Panel and Script Manager

Hi,

I have a ASP.NET web application. I have a gridview and using a RowDataBound andRaisePostBackEventevent for getting the GridView details in the controls below like textboxes, dropdown etc. Now i am using Ajax Extensions controls like Update Panel and Script manager to avoid a postback happening when the GridView row is clicked. Even after implementing them postback is happening. Please see the code bits and let me know if i am missing somewhere.

UI

<asp

:ScriptManagerID="ScriptManager1"runat="server"EnablePartialRendering="true"></asp:ScriptManager>

<

asp:UpdatePanelid="UpdatePanel1"runat="server"UpdateMode="Conditional">

<contenttemplate>

<asp:GridViewID="GridView1"runat="server"OnRowDataBound="GridView1_RowDataBound"CssClass="sampletable"AlternatingRowStyle-CssClass="d1"ShowHeader="true"ShowFooter="false"AllowPaging="true"AllowSorting="true"AutoGenerateColumns="false"DataKeyNames="ProjectID"Width="100%"PageSize="5"><Columns>

<asp:BoundFieldVisible="false"HeaderText="Project ID"DataField="ProjectID"SortExpression="ProjectID"/><asp:BoundFieldHeaderText="Project Name"DataField="ProjectName"SortExpression="ProjectName"/><asp:BoundFieldHeaderText="Site Name"DataField="SiteName"SortExpression="SiteName"/></Columns></asp:GridView><asp:LabelID="Label1"runat="server"Text="Label"></asp:Label><asp:TextBoxID="TextBox1"runat="server"></asp:TextBox><asp:ButtonID="Button1"runat="server"Text="Button"/>

</

contenttemplate>

<

Triggers>

<

asp:AsyncPostBackTriggerControlID="GridView1"EventName="RowDataBound"/>

</

Triggers>

</

asp:UpdatePanel>

And theCode behind for RowDatabound event is

protected

void GridView1_RowDataBound(object sender,GridViewRowEventArgs e)

{

try

{

if (!((e.Row.RowType ==DataControlRowType.Pager) || (e.Row.RowType ==DataControlRowType.Header) || (e.Row.RowType ==DataControlRowType.Footer)))

{

System.Web.UI.

ClientScriptManager cs = Page.ClientScript;//Assign Row Index. This row index used in finding the ID of the clicked rowint intRowIndex = e.Row.RowIndex;

e.Row.Attributes.Add(

"onClick", cs.GetPostBackEventReference(this, intRowIndex.ToString().Trim()));

e.Row.Attributes.Add(

"onKeyDown","if( event.keyCode == 13 ) " + cs.GetPostBackEventReference(this,"KEYDOWN" +"$" + e.Row.DataItemIndex.ToString().Trim()));

}

}

catch (System.Exception ex)

{

//OnError(ex);

}

}

The code looks good, did you try a easy test to see if the postback is hidden?

http://alpascual.com/blog/al/archive/2006/12/21/Code-Snip-_2200_AJAX-Timer_2200_.aspx

Try the sample below and let me know if you see the postback

Thanks for the Quick Response.

But i could not get exactly what you want to convey.

regards,

Parimal

Ok, wrap a asp:button around an updatepanel and let me know if you see the postback

Hi,

The button is working fine without any post back. The Post back is happening when Grid Row is clicked as it call the RaisePostBack event to get the Row details. That event is coded as we have not used any command template in Grid.

regards,

Parimal

OnRowDatabound would not make sense for an async trigger. The user clicking the row and getting a postback via the javascript you added to the onclick is not the same. If you take out the trigger and just add ChildrenAsTriggers="true" to the UpdatePanel it would probably work as you expect.

One other thing - in this code:

"onClick", cs.GetPostBackEventReference(this, intRowIndex.ToString().Trim()));

e.Row.Attributes.Add(

"onKeyDown","if( event.keyCode == 13 ) " + cs.GetPostBackEventReference(this,"KEYDOWN" +"$" + e.Row.DataItemIndex.ToString().Trim()));

Change "this" to GridView1. You want to create a postback for your gridview, not the whole page. Since you're creating a custom postback you'll also need to register for event validation, or disable event validation in your page.

Thanks for the response. But still post back is happening. I will explain in details

1. I have a Gridview RowDataBound event which fires when Data is bounded to Grid.

2. I have aRaisePostBackEvent which fires when the row in the Grid is selected and this causes the Post Back event.

3. Aslo my UserControl is implementingIPostBackEventHandler interface.

Thanks in Advance,

Parimal