asp: textbox on text changed event (C#)

<%@ Page Language="C#" %>
<script runat="server">
    protected void txtSearch_TextChanged(object sender, EventArgs e)
    {
        lblSearchResults.Text = "Search for: " + txtSearch.Text;
    }
</script>
<html>
<head>
    <title>TextBox AutoPostBack</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    
    <asp:Label
        id="lblSearch"
        Text="Search:"
        Runat="server" />
    <asp:TextBox
        id="txtSearch"
        AutoPostBack="true"
        OnTextChanged="txtSearch_TextChanged"
        Runat="server" />

    <hr />
    
    <asp:Label
        id="lblSearchResults"
        Runat="server" />
    
    </div>
    </form>
</body>
</html>

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asp: textbox on text changed event (C#) : TextBox « Asp Control « ASP.Net

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