Text box allow numbers and (_) and letters

Question

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Hi,
I am writing code in asp.net

Here my text box allow only numbers and letters and one underscore special character

Please give me any solution EX: Name is: dd_12333

Thanks

What I have tried:

<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ControlToValidate="txtApplicationNumber" ErrorMessage="Please Enter Appication Number Only" ForeColor="Red" ValidationExpression="^[a-zA-Z''_'\s]{1,40}$">

Posted 17-Apr-17 19:55pm

Member 13134556

Updated 17-Apr-17 20:14pm

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OriginalGriff · Answer 1 · 2017-04-17T20:14:00

Solution 1

Try:

... ValidationExpression="^[0-9a-zA-Z''_'\s]{1,40}$" ...

Posted 17-Apr-17 20:14pm

OriginalGriff

Comments

Member 13134556 15-May-17 5:17am

tanq