Regex - valid $

That looks good for values up to 100,000.00

Is there anything it's failing to match with where it should match, or vice versa?

Are you saying the above doesn't work, or you'd like to add the $ symbol to the pattern?

The pattern appears to work for me:


If you simply want to add the $ symbol, then insert it near the beginning (escaped, of course):

^\$(?:100,000|(?:(?:(?:\d?\d,)?\d)?\d)?\d)\.\d\d$

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If a textbox is blank, it does not catch it.

This will not catch if TextBox1 is blank.

<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
    <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
    <asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ErrorMessage="RegularExpressionValidator"  ControlToValidate="TextBox1" ValidationExpression="^(?:100,000|(?:(?:(?:\d?\d,)?\d)?\d)?\d)\.\d\d$"></asp:RegularExpressionValidator>
</asp:Content>

I can use Requiredfieldvalidator and RequiredfieldRegularExpression at the same time. It is kind of redundant, but that will work.

The thing about using them side by side is the error message displaying.

If textbox1 is empty

textbox1       *required field
 
if textbox1 has an invalid number format

textbox1                                *Invalid format  


Is there a better way?