ansaurus

Question

scriptmanager in masterpage and updatepanel in usercontrol. Partial postback not happening

Answer 1

A:

I built a little test project that mimics your files a little bit. I'm not using a DataList and I've moved the area that needs to be updated into a seperate div (meaning that if you keep the DataList, I don't think your question/answer would be located inside the DataList the way you have it now. So right now, the sample I built just grabs the text from a drop down list and updates a literal in the UpdatePanel with the option the user selected.

Here's my code:

MasterPage:

<%@ Master Language="C#" AutoEventWireup="true" CodeBehind="Site1.master.cs" Inherits="UpdatePanelTest.Site1" %>

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

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title></title>
    <asp:ContentPlaceHolder ID="head" runat="server">
    </asp:ContentPlaceHolder>
</head>
<body>
    <form id="form1" runat="server">
    <asp:ScriptManager ID="scriptManger" EnablePartialRendering="true" runat="server" >
        <Scripts>
            <asp:ScriptReference Path="~/common/js/jquery-1.3.2.min.js" />
        </Scripts>
    </asp:ScriptManager>

    <div>
        <asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server">

        </asp:ContentPlaceHolder>
    </div>


    </form>
</body>
</html>

Default page (no additional code in code-behind):

<%@ Page Title="" Language="C#" MasterPageFile="~/Site1.Master" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="UpdatePanelTest.Default" %>
<%@ Register src="Selector.ascx" tagname="Selector" tagprefix="uc1" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">

    <uc1:Selector ID="Selector1" runat="server" />

</asp:Content>

User Control (Html):

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="Selector.ascx.cs" Inherits="UpdatePanelTest.Selector" %>
<asp:UpdatePanel ID="UpdatePanel1" runat="server" ChildrenAsTriggers="true" UpdateMode="always"  >
<ContentTemplate>  
    <asp:DropDownList ID="lst_question" runat="server" AutoPostBack="true" 
    onselectedindexchanged="lst_question_SelectedIndexChanged" >
        <asp:ListItem Value="0">Option 1</asp:ListItem>
        <asp:ListItem Value="1">Option 2</asp:ListItem>
    </asp:DropDownList>

    <div>
        <asp:Literal ID="Literal1" runat="server"></asp:Literal>
    </div>
</ContentTemplate>
</asp:UpdatePanel>

User Control (Code-behind):

using System;
using System.Web.UI.WebControls;

namespace UpdatePanelTest
{
    public partial class Selector : System.Web.UI.UserControl
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void lst_question_SelectedIndexChanged(object sender, EventArgs e)
        {
            var ddl = sender as DropDownList;
            Literal1.Text = "You selected " + ddl.SelectedItem.Text;
        }
    }
}

mannish 2009-06-20 15:16:58

THANKS but the whole issue is with the datalist, items in the datalist are not able to trigger the update panel postback

2009-06-21 22:49:30

Can you clarify a bit more about what you're trying to accomplish with the data list by using it in that manner (e.g. what you expect to have happen within the data list)? I'll play around with it a bit more, but since I don't have access to your project, I'm only guessing at what is happening behind the scenes in your code behind file. I would be helpful to see your OnSelectedIndexChanged handler at the very least.

mannish 2009-06-22 02:24:22

The items in the list duplicate according to a NumberOfQuestion int property. So if number of question is 2, 2 itemtemplate will show, if 4 ...then 4 ...and so on.Different pages use this control, but have different number of dropdown lists displayed at a time.

2009-06-22 19:57:30

Answer 2

A:

I see <asp:UpdatePanel ID="id" runat="server" ChildrenAsTriggers="true" UpdateMode="always" > in your UpdatePanel definition - this needs to be UpdateMode="Conditional" if you want your UpdatePanel to work asynchronously. No idea why the ASP:NET devs didn't set it to Conditional as a default in the first place (I still sometimes forget it).

Maybe that's already it?

Oliver 2009-12-16 17:44:24

ansaurus

tags:

views:

answers:

scriptmanager in masterpage and updatepanel in usercontrol. Partial postback not happening

related questions