check validation in file uploading (.doc,.docx,.txt,.xls,.xlsx)

ranjan sahoo

14y8.2k.NET

check validation in file uploading (.doc,.docx,.txt,.xls,.xlsx) .this file are allowed for file uploading except this other file can't allowed in asp.net with c# language with code? and example?

3 Replies

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Vithal Wadje14y ago
please check my article about file extension validation here http://www.c-sharpcorner.com/UploadFile/0c1bb2/uploading-and-downloading-excel-files-from-database-using-as/
0
Shivanand Arur14y ago
Just a sample code to help u out... Check the logic... Hope this helps you out...

Code : Default.aspx.cs page

using System;
using System.IO;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{

}

protected void Button1_Click(object sender, EventArgs e)
{
string Extension = Path.GetExtension(FUDoc.PostedFile.FileName);
switch (Extension)
{
case ".doc":
case ".docx":
case ".txt":
case ".xls":
case ".xlsx":
lblError.Text = "File can be uploaded";
break;
default:
lblError.Text = "Error, file Extension not allowed";
break;
}
}
}

Page : Default.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="asp" %>

0
Neha Sharma14y ago
Create this function:
Protected Sub UploadThisFile(ByVal upload As FileUpload)
If upload.HasFile Then
Dim theFileName As String = Path.Combine(Server.MapPath("~/uploads"), upload.FileName)
If File.Exists(theFileName) Then
File.Delete(theFileName)
End If
upload.SaveAs(theFileName)
End If
End Sub

Then add this code on Button click event:

Dim imagech As String
imagech = System.IO.Path.GetExtension(FileUpload1.FileName)
If imagech = ".doc" Or imagech = ".docx" Then
UploadThisFile(FileUpload1)

If it helps you mark it as answer.
0