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POHow to make an ASP.NET TextBox fire it's onTextChanged event fire in an AJAX UpdatePanel?
 

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    <p>I am trying to get an textBox to fire it's onTextChanged event every time a keystroke is made rather than only firing only when it looses focus. I thought that adding the AsyncPostBackTrigger would do this but it's still not working. Is what I'm trying to do even possible? The code is below:</p> <pre><code>&lt;%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Items.aspx.cs" MasterPageFile="~/MMPAdmin.Master" Inherits="MMPAdmin.Items" %&gt; &lt;asp:Content ID="content1" runat="server" ContentPlaceHolderID="ContentPlaceHolder1"&gt; &lt;asp:ScriptManager ID="sm_Main" runat="server" /&gt; &lt;div style="left:10px;position:relative;width:100%;overflow:hidden"&gt; &lt;asp:UpdatePanel ID="up_SearchText" runat="server"&gt; &lt;Triggers&gt; &lt;asp:AsyncPostBackTrigger ControlID="tb_Search" EventName="TextChanged" /&gt; &lt;/Triggers&gt; &lt;ContentTemplate&gt; &lt;div style="position:relative;float:left"&gt; &lt;b style="font-size:xx-large"&gt;Items&lt;/b&gt;(&lt;a href="Item.aspx"&gt;Add New&lt;/a&gt;) &lt;/div&gt; &lt;div style="right:25px;position:absolute; top:30px"&gt; Search: &lt;asp:TextBox ID="tb_Search" runat="server" Width="200" OnTextChanged="UpdateGrid" AutoPostBack="true" /&gt; &lt;/div&gt; &lt;br /&gt; &lt;div&gt; &lt;asp:GridView runat="server" AutoGenerateColumns="true" ID="gv_Items" AutoGenerateEditButton="true" AutoGenerateDeleteButton="true" /&gt; &lt;/div&gt; &lt;/ContentTemplate&gt; &lt;/asp:UpdatePanel&gt; &lt;/div&gt; &lt;/asp:Content&gt; </code></pre>
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