AJAX之FilteredTextBox控件

   <form id="form1" runat="server">
        <asp:ScriptManager ID="ScriptManager1" runat="server" />
        <div>
            <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
            <br />
            <asp:TextBox ID="TextBox4" runat="server"></asp:TextBox><br />
            <asp:TextBox ID="TextBox5" runat="server"></asp:TextBox><br />
            <asp:TextBox ID="TextBox3" runat="server"></asp:TextBox><br />
            <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
            <cc1:FilteredTextBoxExtender ID="FilteredTextBoxExtender1" TargetControlID="TextBox2" runat="server" ValidChars="!@#$%^&*()_+">
            </cc1:FilteredTextBoxExtender>
        </div>
        <cc1:FilteredTextBoxExtender ID="FilteredTextBoxExtender2" TargetControlID="TextBox4" runat="server" FilterType="Numbers">
        </cc1:FilteredTextBoxExtender>
        <cc1:FilteredTextBoxExtender ID="FilteredTextBoxExtender3" TargetControlID="TextBox5"  runat="server" FilterType="UppercaseLetters">
        </cc1:FilteredTextBoxExtender>
        <cc1:FilteredTextBoxExtender ID="FilteredTextBoxExtender4" TargetControlID="TextBox3"  runat="server" FilterType="LowercaseLetters">
        </cc1:FilteredTextBoxExtender>
        <cc1:FilteredTextBoxExtender ID="FilteredTextBoxExtender5" TargetControlID="TextBox1" runat="server" FilterType="Numbers,UppercaseLetters,LowercaseLetters">
        </cc1:FilteredTextBoxExtender>
    </form>