如何仅在C＃中允许在正则表达式验证中使用有限的特殊字符？

Question

我正在使用以下asp.net c＃正则表达式验证

 <asp:TextBox ID="txtName" runat="server" TabIndex="0"></asp:TextBox>
                <asp:RequiredFieldValidator CausesValidation="true" Cssclass="state-error" SetFocusOnError="true" ID="valName" ValidationGroup="reg" Display="Dynamic"
                    runat="server" ControlToValidate="txtName"  ErrorMessage="Name is required"></asp:RequiredFieldValidator>
                    <asp:RegularExpressionValidator CssClass="error-state" ID="RegularExpressionValidator1" runat="server" ControlToValidate="txtName"
                    ValidationExpression="[a-zA-Z ]*$" ErrorMessage="Special characters not allowed." />

现在，我希望它只允许使用'-'，'（'，'）'字符...请帮助！

Answer 1

这应该可以按照您的要求工作：

<asp:TextBox ID="txtName" runat="server" TabIndex="0"></asp:TextBox>
            <asp:RequiredFieldValidator CausesValidation="true" Cssclass="state-error" SetFocusOnError="true" ID="valName" ValidationGroup="reg" Display="Dynamic"
                runat="server" ControlToValidate="txtName"  ErrorMessage="Name is required"></asp:RequiredFieldValidator>
                <asp:RegularExpressionValidator CssClass="error-state" ID="RegularExpressionValidator1" runat="server" ControlToValidate="txtName"
                ValidationExpression="[a-zA-Z\s()\-]*$" ErrorMessage="Special characters not allowed." />