File extension validation from C# code behind for Asp.net file upload control

Question

File extension upload validation from C# code behind for Asp.net file upload control

Vithal Wadje · Answer

i have solved my own issue by using following code if (FileUpload1.HasFile) { try { switch (ext) { case .xls: type = application/vnd.ms-excel; break; case .xlsx: type = application/vnd.ms-excel; break; }

arjunan selvam · Answer

Arjunan function validate() { var Fvalue=document.getElementById('File1').value; var xtension=Fvalue.substring(Fvalue.lastIndexOf('.') + 1); var UCase=xtension.toLowerCase(); if(UCase==xls || UCase==xlsx) { alert(Valid Format); } else { alert(Invalid Format..); Fvalue.focus(); return false; } } FileUpload Simple validation using javascript.