验证控件RegularExpressionValidator验证电话号码，是否为空

 <asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ErrorMessage="*请输入手机号码" ValidationExpression = "^((\(\d{3}\))|(\d{3}\-))?13[0-9]\d{8}|15[89]\d{8}" ControlToValidate="TextBox14"></asp:RegularExpressionValidator>

<asp:RegularExpressionValidator ID="RegularExpressionValidator2" runat="server" ErrorMessage="*请输入正确邮箱" ValidationExpression = "\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*" ControlToValidate="TextBox15"></asp:RegularExpressionValidator> 
<asp:RequiredFieldValidator ID="RequiredFieldValidator7" runat="server" ErrorMessage="＊地址不能为空"  ControlToValidate="TextBox12"></asp:RequiredFieldValidator>