I have file upload project, when the user press ( add file ) and select the desired file, the following function well be executed to save this file on the server

public ActionResult SaveUploadedFile()
        {

            string fName = DateTime.Now.ToString("yyyyMMddHHmmssffffff");

            bool isSavedSuccessfully = true;
            
            foreach (string fileName in Request.Files)
            {
                
                HttpPostedFileBase file = Request.Files[fileName];
                
                if (file != null && file.ContentLength > 0)
                {

                    var originalDirectory = new DirectoryInfo(string.Format("{0}Images\PostImages\DeviceImages\", Server.MapPath(@"")));

                    string pathString = originalDirectory.ToString();

                    bool isExists = System.IO.Directory.Exists(pathString);

                    if (!isExists)
                        System.IO.Directory.CreateDirectory(pathString);

                    
                    
                    string type = file.FileName.Substring(file.FileName.IndexOf("."), file.FileName.Length – file.FileName.IndexOf("."));

                    fName = fName + type;
                    var path = string.Format("{0}\{1}", pathString, fName);
                    file.SaveAs(path);

                }

            }

            if (isSavedSuccessfully)
            {
                UploadImagesNames.Add(fName);
                return Json(new { Message = fName });
            }
            else
            {
                return Json(new { Message = "Error in saving file" });
            }
        }

As the file is uploaded, a progress bar and delete button is appeared as shown in the image

When the file is uploaded completely, I can press the ( Remove File ) to remove the file, The problem is that when I press the ( Remove file ) button when the file is not completely uploaded, in other words , I need a way to stop the execution of SaveUploadedFile()
function when the ( Remove file ) button is pressed.

How can I solve this problem ?

Thanks

Try using some opensource or commercial products which does this functionality already. Please take a look at Dropzone.js (open source)

dropzone

DropzoneJS with ASP.net MVC 5

Check if the below code helps you if you include it in your cancel controller method.

Declare a fileshare property: FileShare.Delete

using (var fs = new FileStream(fullName, FileMode.Append, FileAccess.Write, FileShare.Delete))

Can you be more clear please. When I should put this code ?

Ahmed Shamel

The problem is that when I press the ( Remove file ) button when the file is not completely uploaded

What happens if you pressed Remove File button?

Take a look at this thread, maybe you could find it useful: http://stackoverflow.com/questions/7729806/how-to-cancel-and-delete-the-uploading-file-in-asp-net-mvc-3