Ajax ASP.Net Tutorial

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  4. Using the FilteredTextBox Control
<%@ Page Language="C#" %>
<%@ Register TagPrefix="ajax" Namespace="AjaxControlToolkit"
 Assembly="AjaxControlToolkit" %>
 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">


    Show Filtered TextBox


    
    

        
                    id="lblNumeric"
            Text="Enter a Number:"
            AssociatedControlID="txtNumeric"
            Runat="server" />
        
                    id="txtNumeric"
            Runat="server" />
                    id="fte1"
            TargetControlID="txtNumeric"
            FilterType="Numbers"
            Runat="server" />
        
                    id="lblProductCode"
            Text="Enter a Product Code:"
            AssociatedControlID="txtProductCode"
            Runat="server" />
        
                    id="txtProductCode"
            Runat="server" />
                    id="fte2"
            TargetControlID="txtProductCode"
            FilterType="LowercaseLetters,Custom"
            FilterMode="ValidChars"
            ValidChars="_!"
            Runat="server" />
        
        (A product code can contain only lower-case characters,
        underscores, exclamation marks, and no spaces)