Uploading Files to Server in C#/C-Sharp

By | June 6, 2012


For uploading files to server in C#/C Sharp,

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

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
 <title>Untitled Page</title>
 <form id="form1" runat="server">
 <asp:FileUpload ID="Uploader" runat="server" Height="24px" Width="472px" />&nbsp;
 <asp:Button ID="cmdUpload" runat="server" Height="24px" OnClick="cmdUpload_Click"
 Text="Upload" Width="88px" /><br />
 <br />
 <asp:Label ID="lblInfo" runat="server" EnableViewState="False" Font-Bold="True"></asp:Label></div>

File: Default.aspx.cs

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.IO;

public partial class UploadFile : System.Web.UI.Page
 private string uploadDirectory;
 protected void Page_Load(object sender, EventArgs e)
 uploadDirectory = Path.Combine(Request.PhysicalApplicationPath, "Uploads");

protected void cmdUpload_Click(object sender, EventArgs e)
 if (Uploader.PostedFile.FileName == "")
 lblInfo.Text = "No file specified.";
 string extension = Path.GetExtension(Uploader.PostedFile.FileName);
 switch (extension.ToLower())
 case ".png":
 case ".jpg":
 lblInfo.Text = "This file type is not allowed.";
 string serverFileName = Path.GetFileName(Uploader.PostedFile.FileName);
 string fullUploadPath = Path.Combine(uploadDirectory,serverFileName);


lblInfo.Text = "File " + serverFileName;
 lblInfo.Text += " uploaded successfully to ";
 lblInfo.Text += fullUploadPath;
 catch (Exception err)
 lblInfo.Text = err.Message;

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