AJAX ControlToolkit学习日志-ValidatorCalloutExtender(31)

ValidatorCalloutExtender该控件用于扩展验证控件，对验证控件的错误提示进行样式化及强调化。

下面来看一个示例：

1)在VS2005中新建一个ASP.NET AJAX-Enabled Web Project项目工程，命名为ValidatorCalloutExtender1。

2)在页面上拖放2个TextBox,用于输入用户名和电话号码。同时对输入用户名的TextBox，加一个RequiredFieldValidator；对输入电话号码的TextBox，加一个RequiredFieldValidator和RegularExpressionValidator。同时对每个Validator扩展一个ValidatorCalloutExtender。

代码如下：

1 <div>
2 Name:  
3 <asp:TextBox ID="txtName" runat="server"></asp:TextBox>
4 <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="txtName"
5 Display="None" ErrorMessage="Name is required"></asp:RequiredFieldValidator>
6 <cc1:ValidatorCalloutExtender ID="ValidatorCalloutExtender1" runat="server" TargetControlID="RequiredFieldValidator1">
7 </cc1:ValidatorCalloutExtender>
8 <br />
9 <br />
10 phone:  
11 <asp:TextBox ID="txtPhone" runat="server" OnTextChanged="TextBox2_TextChanged"></asp:TextBox>
12 <asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ControlToValidate="txtPhone"
13 Display="None" ErrorMessage="phone is required"></asp:RequiredFieldValidator>
14 <asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ControlToValidate="txtPhone"
15 Display="None" ErrorMessage="RegularExpressionValidator" ValidationExpression="(\(\d{3}\)|\d{3}-)?\d{8}"></asp:RegularExpressionValidator>
16 <cc1:ValidatorCalloutExtender ID="ValidatorCalloutExtender2" runat="server" TargetControlID="RequiredFieldValidator2">
17 </cc1:ValidatorCalloutExtender>
18 <cc1:ValidatorCalloutExtender ID="ValidatorCalloutExtender3" runat="server" TargetControlID="RegularExpressionValidator1">
19 </cc1:ValidatorCalloutExtender>
20 <br />
21 <br />
22 <asp:Button ID="Button1" runat="server" Text="Button" /></div>

3)按下CTRL+F5，在浏览器里查看效果。

效果图如下：