jQuery Upload Multiple Files in Asp.net using Handler File in C#, VB.NET

By: Suresh Dasari May 21, 2015

Introduction:

Here I will explain how to upload multiple files using jQuery in asp.net with generic handler (ashx) in c#, vb.net or jQuery upload multiple files in asp.net using HTML5 “AllowMultiple” property of fileupload in c#, vb.net.

Description:

In previous articles I explained jQuery call asp.net page methods from json, 7 + jQuery multiple fileupload plugin examples, jQuery check file size before upload in asp.net, jQuery setInterval() function example, jQuery upload multiple files using uplodify plugin in asp.net and many articles relating to jQuery, JavaScript and asp.net. Now I will explain how to upload multiple files using jQuery with generic handler (ashx) in asp.net using c#, vb.net.

To upload multiple files using jQuery with generic handler (ashx) in asp.net first create the new web application and open Default.aspx page and write the following code

<title>uploading file using jquery with generic handler ashx</title>

$(function () {

$('#btnUpload').click(function () {

var fileUpload = $("#FileUpload1").get(0);

var files = fileUpload.files;

var test = new FormData();

for (var i = 0; i < files.length; i++) {

test.append(files[i].name, files[i]);

}

$.ajax({

url: "UploadHandler.ashx",

type: "POST",

contentType: false,

processData: false,

data: test,

// dataType: "json",

success: function (result) {

alert(result);

},

error: function (err) {

alert(err.statusText);

}

});

})

</script>

</head>

<body>

<div>

<asp:FileUpload ID="FileUpload1" runat="server" AllowMultiple="true" />

</div>

</form>

</body>

</html>

If you observe fileupload controller we mentioned property called “AllowMultiple” its HTML5 feature and it will allow us to select multiple files at a time. If you observe above jQuery ajax method we mentioned “UploadHandler.ashx” by using this file we will upload files in server side. Now add handler file in your application by following below steps

Right click on your application à select Add New Item à select Generic Handler file à Give a name and click Add button like as shown below

Once you finished adding handler file now add new folder in your application “uploads” that would be like as shown below

Now open UploadHandler.ashx file and write the following code

C# Code

<%@ WebHandler Language="C#" Class="UploadHandler" %>

using System;

using System.Web;

using System.IO;

public class UploadHandler : IHttpHandler {

public void ProcessRequest (HttpContext context) {

if (context.Request.Files.Count > 0)

{

HttpFileCollection files = context.Request.Files;

for (int i = 0; i < files.Count; i++)

{

HttpPostedFile file = files[i];

string fname;

if (HttpContext.Current.Request.Browser.Browser.ToUpper() == "IE" || HttpContext.Current.Request.Browser.Browser.ToUpper() == "INTERNETEXPLORER")

{

string[] testfiles = file.FileName.Split(new char[] { '\\' });

fname = testfiles[testfiles.Length - 1];

}

else

{

fname = file.FileName;

}

fname=Path.Combine(context.Server.MapPath("~/uploads/"), fname);

file.SaveAs(fname);

}

context.Response.ContentType = "text/plain";

context.Response.Write("File Uploaded Successfully!");

}

public bool IsReusable {

get {

return false;

}

VB.NET Code

<%@ WebHandler Language="VB" Class="Handler" %>

Imports System.Web

Imports System.IO

Public Class Handler : Implements IHttpHandler

Public Sub ProcessRequest(ByVal context As HttpContext) Implements IHttpHandler.ProcessRequest

If context.Request.Files.Count > 0 Then

Dim files As HttpFileCollection = context.Request.Files

For i As Integer = 0 To files.Count - 1

Dim file As HttpPostedFile = files(i)

Dim fname As String

If HttpContext.Current.Request.Browser.Browser.ToUpper() = "IE" OrElse HttpContext.Current.Request.Browser.Browser.ToUpper() = "INTERNETEXPLORER" Then

Dim testfiles As String() = file.FileName.Split(New Char() {"\"c})

fname = testfiles(testfiles.Length - 1)

Else

fname = file.FileName

End If

fname = Path.Combine(context.Server.MapPath("~/uploads/"), fname)

file.SaveAs(fname)

context.Response.ContentType = "text/plain"

context.Response.Write("File Uploaded Successfully!")

End Sub

Public ReadOnly Property IsReusable() As Boolean Implements IHttpHandler.IsReusable

Get

Return False

End Get

End Property

End Class

Now run your application that will allow you to upload files in upload folder using handler files.

Demo

jQuery Upload Multiple Files in Asp.net using Handler File in C#, VB.NET

Download Sample Attached

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2 comments :

Unknown said...: Hi Suresh Sir,
Your post helped me a lot. Thanks for sharing. Now a days I am stuck at a point. I need realtime file upload progress i.e. FileSize and remaining size to be uploaded, remaining time, percent completed along with a progress bar. Kindly help as I am working on it from past 3 days. I need to upload very huge file on to the server whatever file extension it has.

Kindly help will be so grateful of you.; September 14, 2015 at 11:11 PM
Anonymous said...: Hi sir if i select ed one by one then it uploadeed several times; September 6, 2016 at 4:32 AM

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