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Postbacks when using controls

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Ajax

This is a migrated thread and some comments may be shown as answers.

Casey asked on 05 Jul 2011, 02:58 PM

I have a webform which calls a control that creates a grid. One of the fields in the grid needs to run a method when the selection is changed. This causes the whole page to postback. I need it to only postback for a couple of the different items contained within the grid. I have tried several different solutions (adding a radajaxmanager, a radajaxproxy, adding the ajaxsettings in the code behind, etc) without success. I'm sure there is something real basic I am overlooking. Could someone please point me in the right direction? Thanks!

Test.aspx

<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="Test.aspx.vb" Inherits="Project.Test" %>

<%@ Register src="../controls/cntControl.ascx" tagname="cntControl" tagprefix="uc1" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

function pageLoad() {

}

</script>

</head>

<body>

<div>

<telerik:RadScriptManager ID="RadScriptManager1" Runat="server">

</telerik:RadScriptManager>

<uc1:cntAttibuteOptionTypes ID="cntControl1" runat="server" />

</div>

</form>

</body>

</html>

cntControl.ascx

<%@ Control Language="vb" AutoEventWireup="false" Codebehind="cntControl.ascx.vb" Inherits="Project.cntControl" TargetSchema="http://schemas.microsoft.com/intellisense/ie5" %>

<P>

<telerik:RadGrid ID="dgOptions" runat="server" CellSpacing="0" GridLines="None"

ShowHeader="False" Skin="Web20" AutoGenerateColumns="false"

BorderStyle="None">

<telerik:GridBoundColumn DataField="displaytext" ItemStyle-Wrap="False">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn Visible="False" DataField="OptionTypeCd"></telerik:GridBoundColumn>

<telerik:GridTemplateColumn>

<asp:DropDownList id="ddlProdOption" AutoPostBack="true" OnSelectedIndexChanged="DropDown_SelectedIndexChanged"

runat="server"></asp:DropDownList>

</ItemTemplate>

</telerik:GridTemplateColumn>

<asp:TextBox ID="txtProdOption" Runat="server" Width="200px"></asp:TextBox>

</ItemTemplate>

</telerik:GridTemplateColumn>

<telerik:GridTemplateColumn>

<asp:TextBox ID="txtImage" runat="server" Width="70"></asp:TextBox> 

</ItemTemplate>

</telerik:GridTemplateColumn>

<telerik:GridTemplateColumn>

<asp:TextBox ID="txtLrgImage" Runat="server"></asp:TextBox> 

</ItemTemplate>

</telerik:GridTemplateColumn>

</Columns>

</EditFormSettings>

</MasterTableView>

</telerik:RadGrid>

<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">

<telerik:AjaxSetting AjaxControlID="dgOptions">

<telerik:AjaxUpdatedControl ControlID="dgOptions" />

</UpdatedControls>

</telerik:AjaxSetting>

</AjaxSettings>

</telerik:RadAjaxManager>

<p>

1 Answer, 1 is accepted

answered on 08 Jul 2011, 09:53 AM

RadControlsWebSite15.zip

Hi Casey,

Tha ajax settings you added a proper so there is no obvisous reason for the postback to happen. Can you check if you have any javascript errors on the page? Or troubleshoot the web resources as suggested here.

Additionally, I prepared a sample based on your code. Try to run it on your end and let me know how it goes and if something differs from your case.

All the best,
Iana
the Telerik team

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