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File extension validation in textbox in windows form,c#

Posted By: Jayakumar     Posted Date: March 18, 2010    Points:2   Category :Windows Application
hi

i have inserting a column in a table called as pathstring which contains song names ("oruvan.mp3").

i am entering this value to table by textbox. i have to vallidate this textbox for ".mp3" extension. while user enters as only "oruvan" then it should throw error.

how to validate this (substring concept)..

regards
jai

Responses
Author: Lalij Mer             
Posted Date: March 18, 2010     Points: 5   

you can also achieve this using Java Script

// You can specify the file type in the code "valid_extensions = /(.doc|.pdf)$/i;" .
//If you want to add .docx supprt simply add |.docx (ex:(.doc|.pdf |.docx| .your-extension) )

var valid_extensions = /(.doc|.pdf)$/i;
function CheckExtension(fld)
{
if(fld.value) {
if (valid_extensions.test(fld.value)){
return true;
} else {
return false;
}
} else {
return true;
}
}


Please Check my answer if you help....
Thank You...

Lalit.
Author: Jayakumar             
Posted Date: March 18, 2010     Points: 5   

hi lalit

we can use it for windows application 3.5 with c#.

how to validate a textbox with errorprovider control.

on keypress event of textbox, we can use it...

jai



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