Downloading multiple files from api

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Write File. AwayFromZero : ,. Builder; using Microsoft. HttpsPolicy; using Microsoft. Mvc; using Microsoft. Configuration; using Microsoft. DependencyInjection; using Microsoft. Logging; using Microsoft. Models; using System; using System.

Tasks; using UploadandDownloadFiles. Use this method to add services to the container. AddControllers ; services. Use this method to configure the HTTP request pipeline. UseDeveloperExceptionPage ; app. Right click on "Reference" in Solution Explorer. Now, expand Assemblies, select Framework, and find the above mentioned two assemblies. Select those assemblies and finally click OK.

Step 9 Now, add download methods in corresponding Controller. This method is used for merging all the files as a compressed format. View All. Vignesh Mani Updated date Aug 18, Next Recommended Reading. For using it on the client-side, we need to add the corresponding method to the file. The next step is calling the method in our app. Then, the first call of the method will be in the initialization method so that we load the list of photos when we access the home page for the first time.

The second call is in the returnToCreate method. Since successful user creation triggers that method, we expect a refreshed list every time we add a new user and its photo. Lastly, we can delete the unnecessary getUsers call from the initialization method:. By comparing the files in the Images folder and the ones on the UI, we can see that all photos with the desired extension are shown and not only the ones that belonged to users:.

Now that we have our files ready on the UI, they are ready for download as well. Stay tuned for the next part. By clicking the download button, we expect that the picture associated with that specific button gets downloaded.

To differentiate which file will be downloaded, we need to send some data to the server. The idea is simple: pass the file URL from the form to the file. The mentioned implementation requires changes in both the client and server parts. On the client part, we are going to extend the download method by passing the URL as a parameter. Since the DownloadComponent exists separately, we will have to pass the data somehow. It provides us with a possibility to pass any data from the parent to the child component — in this case, from AppComponent to DownloadComponent.

The URL of the file will be passed to the back-end as a query parameter. Then, respectfully, the download. And finally, pass the desired URL from the app.

When we pass the URL parameter, we combine it with the directory in which our pictures are saved and read the file from that specific location. Later on, we copy the content of the file to a stream and return it to the client as a File. And yes, we have to handle the data returned from the API.