Backslash escaping in RegularExpressionValidator

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Published on 2010-03-16T09:49:12Z Indexed on 2010/03/16 9:56 UTC
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ASP.NET

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regex

I need to ensure that the input value contains at least one dot, so i use the following:

<asp:RegularExpressionValidator runat="server" ControlToValidate="MyInput" Text="*" ErrorMessage="must contain at least one dot" ValidationExpression="\.+" />

And that doesn't work. By inspecting the page source i can see that ASP.NET escapes the backslash character so in java-script it looks like "\\.+". Why does it do so and how do i prevent RegularExpressionValidator from escaping it?

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