asp.net - The server tag is not well formed?

Question

I am getting the above error. I want to validate the textbox which allow some special characters but not letters and numbers. For that I wrote the below code but it is giving the above error.

The code

<asp:TextBox ID="txtTag" runat="server" Width="250"></asp:TextBox>&nbsp;&nbsp;&nbsp;
<asp:RegularExpressionValidator ID="reg1" runat="server"
    ControlToValidate="txtTag" ErrorMessage="*" Text="please check" 
    ValidationExpression="/^[[\]'/\\@ &(){}+$%#=~"-`/*.&]([[\]'/\\@ &(){}+$%#=~"-`/*.&]*)$/" />

What am I doing wrong?

Answer 1

转义ValidationExpressionwith中的引号"：

ValidationExpression="/^[[\]'/\\@ &(){}+$%#=~"-/*.&]([[]'/\@ &(){}+$%#=~"-/*.&]*)$/"

否则它们会与外部引号发生冲突。

Answer 2

利用

/^[[\]'/\\@ &(){}+$%#=~"-/*.&]([[]'/\@ &(){}+$%#=~"-/*.&]*)$/

作为ValidationExpression.