JAVA SCRIPT FUNCTION:-
function validateExtensipon() {
var arrayExt = ['pdf', 'doc', 'docx', 'txt', 'xlsx', 'ppt', 'zip'];
var FilesVale = document.getElementById("FileUpload1");
var Ext = FilesVale.value.substring(FilesVale.value.lastIndexOf('.') + 1).toLowerCase();
if (arrayExt.indexOf(Ext) <= -1) {
alert("Upload only pdf,doc,zip,txt.xlsx and ppt extension flle");
return false;
}
else {
alert("File Upload Successfully..........")
}
}
This is the function that we have used for check extension of file
Aspx Page Code
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title></title>
<script type="text/javascript">
function validateExtensipon() {
var arrayExt = ['pdf', 'doc', 'docx', 'txt', 'xlsx', 'ppt', 'zip'];
var FilesVale = document.getElementById("FileUpload1");
var Ext = FilesVale.value.substring(FilesVale.value.lastIndexOf('.') + 1).toLowerCase();
if (arrayExt.indexOf(Ext) <= -1) {
alert("Upload only pdf,doc,zip,txt.xlsx and ppt extension flle");
return false;
}
else {
alert("File Upload Successfully..........")
}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:FileUpload ID="FileUpload1" runat="server" />
<br />
<br />
</div>
<asp:Button ID="Button1" runat="server" Text="Upload" OnClientClick="return validateExtensipon();" />
</form>
</body>
</html>
Download sample code
