Please enable Javascript to correctly display the contents on Dot Net Tricks!
 
Become an Expert in C#, .NET, MVC, JAVA, PHP, AngularJS, Hadoop, Android, iphone, Testing etc.
by Joining our Training Programs and Take Your Career to the Next Level! To know more make a call on +91 98 71 749695

How to upload a file in MVC4

Posted By : Shailendra Chauhan, 12 Jan 2013
Updated On : 11 Jun 2014
Total Views : 153,551   
Version Support : MVC4 & MVC3
 
Keywords : validate file using jquery,upload file in mvc4 with client side validation,validate file using jquery before upload in mvc4 mvc3

Uploading a file in Asp.Net MVC application is very easy. The posted file is automatically available as a HttpPostedFileBase parameters in the action of the controler. For uploading a file on the server you required to have a file input control with in html form having encoding type set to multipart/form-data. The default encoding type of a form is application/x-www-form-urlencoded and this is no sufficient for posting a large amount of data to server.

How to do it..

Step 1 : Form for uploading the file

@using (Html.BeginForm("FileUpload", "Home", FormMethod.Post, new { enctype = "multipart/form-data" }))
{ 
 @Html.ValidationSummary();
 <ol>
 <li class="lifile">
 <input type="file" id="fileToUpload" name="file" />
 <span class="field-validation-error" id="spanfile"></span>
 </li>
 </ol>
 <input type="submit" id="btnSubmit" value="Upload" />
}

Step 2 : Validating the file on client side

<script type="text/jscript">
//get file size
function GetFileSize(fileid) {
 try 
 {
 var fileSize = 0;
 //for IE
 if ($.browser.msie) 
 {
 //before making an object of ActiveXObject, 
 //please make sure ActiveX is enabled in your IE browser
 var objFSO = new ActiveXObject("Scripting.FileSystemObject"); var filePath = $("#" + fileid)[0].value;
 var objFile = objFSO.getFile(filePath);
 var fileSize = objFile.size; //size in kb
 fileSize = fileSize / 1048576; //size in mb 
 }
 //for FF, Safari, Opeara and Others
 else 
 {
 fileSize = $("#" + fileid)[0].files[0].size //size in kb
 fileSize = fileSize / 1048576; //size in mb 
 }
 return fileSize;
 }
 catch (e) 
 {
 alert("Error is :" + e);
 }
}

//get file path from client system
function getNameFromPath(strFilepath) 
{
 var objRE = new RegExp(/([^\/\\]+)$/);
 var strName = objRE.exec(strFilepath);
 
 if (strName == null) 
 {
 return null;
 }
 else 
 {
 return strName[0];
 }
}

$("#btnSubmit").live("click", function () 
{
 if ($('#fileToUpload').val() == "") 
 {
 $("#spanfile").html("Please upload file");
 return false;
 }
 else 
 {
 return checkfile();
 }
});

function checkfile() 
{
 var file = getNameFromPath($("#fileToUpload").val());
 if (file != null) 
 {
 var extension = file.substr((file.lastIndexOf('.') + 1));
 // alert(extension);
 switch (extension) {
 case 'jpg':
 case 'png':
 case 'gif':
 case 'pdf':
 flag = true;
 break;
 default:
 flag = false;
 }
 }
 if (flag == false) 
 {
 $("#spanfile").text("You can upload only jpg,png,gif,pdf extension file");
 return false;
 }
 else 
 {
 var size = GetFileSize('fileToUpload');
 if (size > 3) 
 {
 $("#spanfile").text("You can upload file up to 3 MB");
 return false;
 }
 else 
 {
 $("#spanfile").text("");
 }
 }
}

$(function () 
{
 $("#fileToUpload").change(function () {
 checkfile();});
});
</script>

Step 3 : Controller's action for receiving the posted file

[HttpPost]
public ActionResult FileUpload(HttpPostedFileBase file)
{
 if (ModelState.IsValid)
 {
 if (file == null)
 {
 ModelState.AddModelError("File", "Please Upload Your file");
 }
 else if (file.ContentLength > 0)
 {
 int MaxContentLength = 1024 * 1024 * 3; //3 MB
 string[] AllowedFileExtensions = new string[] { ".jpg", ".gif", ".png", ".pdf" };
 
 if (!AllowedFileExtensions.Contains(file.FileName.Substring(file.FileName.LastIndexOf('.'))))
 {
 ModelState.AddModelError("File", "Please file of type: " + string.Join(", ", AllowedFileExtensions));
 }
 
 else if (file.ContentLength > MaxContentLength)
 {
 ModelState.AddModelError("File", "Your file is too large, maximum allowed size is: " + MaxContentLength + " MB");
 }
 else
 {
 //TO:DO
 var fileName = Path.GetFileName(file.FileName);
 var path = Path.Combine(Server.MapPath("~/Content/Upload"), fileName);
 file.SaveAs(path);
 ModelState.Clear();
 ViewBag.Message = "File uploaded successfully";
 }
 }
 }
 return View();
}

How it works...

What do you think?

I hope you will enjoy the tips while working with MVC. I would like to have feedback from my blog readers. Your valuable feedback, question, or comments about this article are always welcome.


 
Further Reading
 
About the Author
Hey! I'm Shailendra Chauhan full-time author, consultant & trainer. I have more than 6 years of hand over Microsoft .NET technologies and other web technologies like JavaScript, AngularJS, NodeJS etc. I am an entrepreneur, the founder & chief editor of www.dotnet-tricks.com and www.dotnettricks.com. I am author of most popular e-books for technical Interview on ASP.NET MVC Interview Questions and Answers & AngularJS Interview Questions and Answers & LINQ Interview Questions and Answers.
I have delivered 100+ training sessions to professional world-wide over Microsoft .NET technologies such C#, ASP.NET MVC, WCF, Entity Framework and other mobile technologies such Ionic, PhoneGap, Corodva. Read more...
 
Free Interview Books
 
SUBSCRIBE & FOLLOW US
 
Browse By Category
 
 
Like us on Facebook