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Listing 2.7 - TextBoxAutoPostBack.aspx

Illustrates how to post back a form to a server when a TextBox changes automatically.

Listing 2.7 - TextBoxAutoPostBack.aspx (C#)
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<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

    protected void txtSearch_TextChanged(object sender, EventArgs e)
    {
        lblSearchResults.Text = "Search for: " + txtSearch.Text;
    }
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <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>