Check File size and if in range upload the file not in range disable upload button
on single webform it work perfectlly when i put it in my content page which is linked to master page not diasbling the button
<script type="text/javascript">
function validateFileSize() {
var uploadControl = document.getElementById('<%= FileUpload1.ClientID %>');
if (uploadControl.files[0].size > 1048576) {
alert('1');
document.getElementById('dvMsg').style.display = "block";
document.getElementById("btnUpload").disabled = true;
alert('2');
return false;
alert('3');
}
else {
document.getElementById('dvMsg').style.display = "none";
document.getElementById("btnUpload").disabled = false;
return true;
}
}
</script>
<asp:FileUpload ID="FileUpload1" runat="server" onchange="validateFileSize();" />
<asp:Button ID="btnUpload" Text="Upload File" runat="server"
name="submit" value="Submit" OnClientClick="return checkfile();"
onclick="btnUpload_Click" />