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Editorial Team
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Asked: 2026-06-13T13:11:29+00:00

The problem is described in the title. It does postbacking also when I specifically

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The problem is described in the title. It does postbacking also when I specifically set AutoPostBack property of the ListBox to false, though it should be like that by default.
ListBox selection mode is set to multiple.

There is a similar question but with a different background.

What am I missing? Is this some well known issue?

Thank you for replying,
please tell if you need the exact code

EDIT:

Here’s the aspx page. Codebehind is much larger, since this page is the target of redirection, please tell if you need additional info from there.

    <%@ Page Language="C#" AutoEventWireup="true" CodeFile="ReportsPreviewViewAddParams.aspx.cs" Inherits="Admin_ReportsPreviewViewAddParams" %>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
</head>
<body>
    <form runat="server">

        <asp:HiddenField ID="SqlSelect" runat="server" />
        <asp:HiddenField ID="SqlColumnSize" runat="server" />
        <asp:HiddenField ID="SqlGroup" runat="server" />
        <asp:HiddenField ID="SqlOrder" runat="server" />
        <asp:HiddenField ID="PageSize" runat="server" />
        <asp:HiddenField ID="SumColumns" runat="server" />

        <asp:Repeater ID="RepeaterInput" runat="server" OnItemDataBound="OnRepeaterItemDataBound" >
            <HeaderTemplate>
                <table>
                <tr><th>
                    <asp:Label ID="LabelHeader" runat="server" Text='<%# Webcom.Configurator.Core.MLPersistentManager.GetKeyValue("Admin.Reports.EnterParams") %>' />
                </th></tr>
            </HeaderTemplate>
            <ItemTemplate>
                <tr>
                    <td>
                        <asp:TextBox ID="TextBoxValueOne" runat="server" AutoPostBack="false" />
                        <asp:ListBox ID="ListBoxControlOne" runat="server" AutoPostBack="false" />
                    </td>
                    <td><asp:Label ID="LabelOperatorOne" runat="server" /></td>
                    <td><asp:Label ID="LabelColumnName" runat="server" /></td>
                    <td><asp:Label ID="LabelOperatorTwo" runat="server" /></td>
                    <td>
                        <asp:TextBox ID="TextBoxValueTwo" runat="server" AutoPostBack="false" />
                        <asp:ListBox ID="ListBoxControlTwo" runat="server" AutoPostBack="false" />
                    </td>
                </tr>
            </ItemTemplate>
            <FooterTemplate>
                </table>
            </FooterTemplate>
        </asp:Repeater>

        <asp:Button ID="buttonSubmit" runat="server" Visible="true" OnClick="OnSubmit" />

    </form>
</body>
</html>
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1 Answer

  1. Editorial Team

    The repeater does not have a way of tracking autopostbacks that happen from controls within the repeater. This may offer you a clue:

    Handling autopostbacks within a repeater

    You could try initializing the AutoPostBack property early in the code-behind page life-cycle, perhaps in Page Load method (after page controls have been created):

    ListBox ListBoxControlOne = (ListBox)RepeaterInput.FindControl("ListBoxControlOne");
ListBoxControlOne.AutoPostBack = false;
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