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HttpRequestMessage message = new HttpRequestMessage() Progress.HttpSendProgress += new EventHandler(HttpSendProgress) ProgressMessageHandler progress = new ProgressMessageHandler() One more thing worth noting, since we are uploading files, the content for our HTTP request will be MultipartFormDataContent.
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Filedrop m ar how to#
Henrik Nielsen has great instructions on how to set it up, it’s very easy, and with Web API RC, there is no GAC anymore. However, this ProgressMessageHandler is relatively new, and hasn’t made it into the Web API RC (but will be part of the final release), so to use this you’d need daily build from Nuget. The solution is to include in the project from ASP.NET Web API package on Nuget (you might as well grab entire Web API client libraries, since we’ll be using JSON.NET later on for deserialization anyway so it will come in useful). Please note that this feature is not part of the standard you’d normally reference from a WPF application, as it’s shipping with ASP.NET Web API. The request will be despatched by the new HttpClient and pass through a ProgressMessageHandler, which will, in turn, track the progress of the file upload. Now let’s look at the method responsible for the upload of files. Then we call the UploadFiles method, the core of our application, and set the background color back (since the drag leave event won’t happen anymore). On drop, we read the list of file paths from the event arguments, and add them to the aforementioned files ObservableCollection which we are using to bind the UI and codebehind together. It contains a drop area – Listbox – which will also list the files after they have been dropped, and a status bar, which will display helpful messages and a progress bar in a bottom right corner. If you read (or at least skimmed) the previous post, the Web API controller saves the uploaded files to c:/uploads. Of course in normal scenario the two apps wouldn’t be run on the same machine, but since they will be communicating over HTTP only, that’s enough for this demo. The idea is that I will have this Web API application running locally, and WPF application will submit files to it over HTTP. If you have your own implementation you can use it, if not just grab the source project from that post and run that. Once the files are successfully uploaded, the list of files is updated with the information which file has been uploaded and what is its size Upload controllerĪs mentioned, the upload controller is the same as in this post. The progress bar indicates to percentage of upload progressĤ. The application reads the files, displays them in a list and submits to ASP.NET Web APIģ. User starts a WPF client application and drags and drops a number of files to it.Ģ. The client will use the new HttpClient and it’s client-side DelegatingHandlers.ġ. The important thing, is that we will use the *exact* same Web API upload controller as before, meaning the same controller will be handling uploads from the browser and from the client (WPF) application. Today I will continue with the same topic, but instead, let’s build a WPF application to which you can drag and drop files, and they’ll get uploaded to ASP.NET Web API. A while ago, I wrote a post on uploading files to ASP.NET Web API by dragging and dropping them to the browser.