用RegularExpressionValidator 验证电子邮件

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<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" validationexpression="^/w+((-/w+)|(/./w+))*/@[a-za-z0-9]+((/.|-)[a-za-z0-9]+)*/.[a-za-z0-9]+$"
                                                        ErrorMessage="请输入正确的电子邮件" ControlToValidate="txtEmail"></asp:RegularExpressionValidator>