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Uploading Multiple Files Using Flash in ASP.Net


Add "FlashUpload.dll" to Bin folder of ASP.Net.

Upload.cs class

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.SessionState;
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 class Upload : IHttpHandler, IRequiresSessionState
{   

    public bool IsReusable
    {
        get { return true; }
    }
    public void ProcessRequest(HttpContext context)
    {
        if ( context.Request.Files.Count > 0 )
        {
            for(int j = 0; j < context.Request.Files.Count; j++)
            {
                HttpPostedFile uploadFile = context.Request.Files[j];
                if (uploadFile.ContentLength > 0)
                {
                    uploadFile.SaveAs(context.Server.MapPath("~/Uploads/"+uploadFile.FileName));                   
                }               
            }
        }
    }

}

Web.config

In  <system.web> of config file add the following tags
    <httpHandlers>
      <!--
        The httpHandler that files are uploaded to, defined in App_Code/Upload.cs
      -->
      <remove verb="POST,GET" path="Upload.cs"/>
       <add verb="POST,GET" path="Upload.cs" type="Upload"/>
     </httpHandlers>
    <!--
        The maximum files size allowed
      -->
    <httpRuntime maxRequestLength="1550000"/>
     <customErrors mode="Off" />

Default.aspx
<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" EnableEventValidation="false" %>
 <%@ Register Assembly="FlashUpload" Namespace="FlashUpload" TagPrefix="FlashUpload" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
 <head runat="server">
    <title>Untitled Page</title>
 </head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:LinkButton ID="LinkButton1" runat="server"
            Visible="False">LinkButton</asp:LinkButton>
        <br />
    <FlashUpload:FlashUpload ID="flashUpload" runat="server"
            UploadPage="Upload.cs" OnUploadComplete="UploadComplete()"
            FileTypeDescription="Images"
            FileTypes="*.*"
            UploadFileSizeLimit="1800000" TotalUploadSizeLimit="2097152" />
    </div>
    </form>
 </body>
 </html>

Default.aspx.cs

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

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            string jscript = "function UploadComplete(){" + ClientScript.GetPostBackEventReference(LinkButton1, "") +"};";
            Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "FileCompleteUpload", jscript, true);
        }
    }
}


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