ASP.NET2.0验证控件分组

把验证控件和被验证控件关联的按钮，添加ValidationGroup属性，并且设置相同的值。

<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="TextBox1"
 ErrorMessage="请输入注册的用户名" ValidationGroup="va1"></asp:RequiredFieldValidator>
<asp:Button ID="Button1" runat="server" Text="马上注册" OnClick="Button1_Click" ValidationGroup="va1" />

<asp:Button ID="Button3" runat="server" PostBackUrl="~/login.aspx" Text="马上登陆" />
<asp:Button ID="Button2" runat="server" OnClick="Button2_Click" Text="清空" UseSubmitBehavior="False" />