Solved

ASP.NET WEB API File Upload (FileStream to FileUplaod)

Posted on 2013-06-20
2
1,629 Views
Last Modified: 2013-09-04
Hi!

I need to make a File Upload method in my ASP.NET Web API. The fileuploader shall be used by some native apps (iPhone / Android). I have never made this before, and don't know the best way to solve this.

When files are uploaded in my webproject I use a method that resizes and saves (uploads) the image. I would very much like to use this method in the WEB API also, but the problem is that this Method expects an FileUplad (not FileStrem) input. Is there any way to convert a FileStrem to a FileUpload?

Please see attached code, hope it illustrates what I try to achieve. If someone can help me fix this code I would be very thankful :)

public HttpResponseMessage PostProfileImage([FromUri]string filename)
{
            
    try
    {
        var task = this.Request.Content.ReadAsStreamAsync();
        task.Wait();
        Stream requestStream = task.Result;

            
        //USE "UploadAndResize" BELOW INSTEAD OF THIS:
        //Stream fileStream = File.Create(HttpContext.Current.Server.MapPath("~/" + filename));
        //requestStream.CopyTo(fileStream);
        //fileStream.Close();
        //requestStream.Close();


        // HERE I SHOULD MAKE A FILEUPLAOD OBJECT BASED ON THE FILESTREAM:
        System.Web.UI.WebControls.FileUpload myFile = new FileUpload();
                
        Int32 width = 500;
        bool resize = true;
        string imageName = myFile.FileName;
        string mapPath = ProfileImagePath(UserName.ToLower();

        // Save new image on disk (method expects FileUpload object)
        UploadAndResize uploader = new UploadAndResize();
        uploader.StartUploadProcess(myFile, width, resize, imageName, mapPath);

        Request.CreateResponse(HttpStatusCode.OK);
    }
    catch
    {
        Request.CreateResponse(HttpStatusCode.InternalServerError);
    }

}

Open in new window

0
Comment
Question by:webressurs
2 Comments
 
LVL 20

Expert Comment

by:Daniel Van Der Werken
ID: 39262288
I don't know. Seems like you are doing this in a way that's not the correct way to use the FileUpload class. I am looking at this:

http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.fileupload.filecontent(v=vs.100).aspx

and have also written file upload functionality for aspx pages in the past. It's pretty straight forward. You use the control and the file stream comes in as part of the upload class itself.

I don't think you need to intercept the HTTP stream like you're doing here. Just implement the FileUpload control like it shows in the link I posted above.

Is there some reason you can't do that?
0
 
LVL 75

Accepted Solution

by:
käµfm³d   👽 earned 500 total points
ID: 39263015
You shouldn't be attempting to use WebForms controls in MVC-style (including Web API) apps. Review the "Implement file uploading" section here for logic to perform file uploads in Web API:

http://blogs.msdn.com/b/codefx/archive/2012/02/23/more-about-rest-file-upload-download-service-with-asp-net-web-api-and-windows-phone-background-file-transfer.aspx
0

Featured Post

How our DevOps Teams Maximize Uptime

Our Dev teams are like yours. They’re continually cranking out code for new features/bugs fixes, testing, deploying, responding to production monitoring events and more. It’s complex. So, we thought you’d like to see what’s working for us. Read the use case whitepaper.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
vb.net winforms sizing/resolution? 4 42
linq, c# 8 22
asp.net mvc , views, hidden values ? 2 16
How to repeat the data 4 17
IntroductionWhile developing web applications, a single page might contain many regions and each region might contain many number of controls with the capability to perform  postback. Many times you might need to perform some action on an ASP.NET po…
Problem Hi all,    While many today have fast Internet connection, there are many still who do not, or are connecting through devices with a slower connect, so light web pages and fast load times are still popular.    If your ASP.NET page …
In a recent question (https://www.experts-exchange.com/questions/29004105/Run-AutoHotkey-script-directly-from-Notepad.html) here at Experts Exchange, a member asked how to run an AutoHotkey script (.AHK) directly from Notepad++ (aka NPP). This video…

856 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question