I'm trying to write an .NET application for uploading a file and restricting the file extension to .doc,.docx, .jpg.. I guess everything is okay with the Code.but still I can see "Unhandled expression error when I tried uploading a file with different extension.
The code is as follows:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace practice2
{
public partial class _Default : Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
if(FileUpload1.HasFile)
{
string FileEx = System.IO.Path.GetExtension(FileUpload1.FileName);
if (FileEx.ToLower()!= ".doc" && FileEx.ToLower()!= ".docx" && FileEx.ToLower()!= ".jpg")
{
Label1.Text = &q ...
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