Excel file checking using RegularExpressionValidator

Hi

I am working on ASP.net2.0, C#

I have a regular expression which checks if file is xls or not

It works fine, if we sellect the file from local system or map drive

But it does not work if we take the file from map drive

like
\\barney\Testing\Excel Example_R1.xls

My RegularExpressionValidator is

<asp:RegularExpressionValidator id="RegExpFile" runat="server" ErrorMessage=" "
ControlToValidate="FileUpload1" ValidationExpression="^.+\.((xls)|(XLS)|(Xls))$"></asp:RegularExpressionValidator>


Please help

This is very urgent for me
dinesh_baliAsked:
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ozoCommented:
It looks like the expression should work for
\\barney\Testing\Excel Example_R1.xls
Does it make any difference if you omit the "^.+"
0
dinesh_baliAuthor Commented:
Sorry, It was [a-zA-Z0_9].*\bxls\b

Is the ="^.+\.((xls)|(XLS)|(Xls))$

As I only want user should select only excel file, he should not able to select any other file

Thanks
0
AlexNekCommented:
It is look OK, it can parse the lines. I test exresion. It is possible that you have an additional symbol in "wrong line" or missied new line symbol.
^ (anchor to start of string)
. (any character)
+ (one or more times)
.
Capture
  Capture
    xls
  End Capture
    or
  Capture
    XLS
  End Capture
    or
  Capture
    Xls
  End Capture
End Capture
$ (anchor to end of string)
0

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