Can we assign file extension using FileUpload

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How can we assign file extension using FileUpload?

 

[Guest]

What exactly are you trying to do and why?

Tell us more about what you want to accomplish, there may be a better/easier
way.

-KF

 

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I want to uer upload a excel file, I want to limit the file extension to
".xls"

 

[Mark Rae]

I want to uer upload a excel file, I want to limit the file extension to
".xls"

protected HtmlInputFile txtFileName;

if(Path.GetExtension(txtFileName.PostedFile.FileName) != ".xls"
{
// do something
}

 

[Guest]

you can use a asp:RegularExpressionValidator to validate file extensions

a sample regular expression for XSL and CSV is

^[0-9A-Za-z_ ]+(.[xX][lL][sS]|.[cC][sS][vV])$

i am not good in regular exps, following site got lot of samples

http://www.regexlib.com/REDetails.aspx?regexp_id=259

 

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I have tried the RegularExpressionValidator , but no effect!

you can use a asp:RegularExpressionValidator to validate file extensions

a sample regular expression for XSL and CSV is

^[0-9A-Za-z_ ]+(.[xX][lL][sS]|.[cC][sS][vV])$

i am not good in regular exps, following site got lot of samples

http://www.regexlib.com/REDetails.aspx?regexp_id=259

protected HtmlInputFile txtFileName;

if(Path.GetExtension(txtFileName.PostedFile.FileName) != ".xls"
{
// do something
}

 

[Guest]

Well, the reason could be that the Regular expression you are using is wrong.
You may want to test the expression with a RegularExpression tester to see
if it works.

I have used RegularExpressionValidator with file upload , in the past and it
used to work. Do not have access to the code now to post sample

I have tried the RegularExpressionValidator , but no effect!

you can use a asp:RegularExpressionValidator to validate file extensions

a sample regular expression for XSL and CSV is

^[0-9A-Za-z_ ]+(.[xX][lL][sS]|.[cC][sS][vV])$

i am not good in regular exps, following site got lot of samples

http://www.regexlib.com/REDetails.aspx?regexp_id=259

I want to uer upload a excel file, I want to limit the file extension to
".xls"

protected HtmlInputFile txtFileName;

if(Path.GetExtension(txtFileName.PostedFile.FileName) != ".xls"
{
// do something
}