ASP.NET MVC 4 Recipes: A Problem-Solution Approach by John Ciliberti

Author:John Ciliberti
Language: eng
Format: mobi, pdf
Tags: Web, Computers, Programming, Microsoft Programming, Web Programming
ISBN: 9781430247739
Publisher: Apress
Published: 2013-02-19T18:30:00+00:00

Listing 8-5. Using Task.WhenAll with Tasks with Different Return Types

public async Task<ActionResult> GetPhotoAndComments()

{

List<Task> tasks = new List<Task>();

using (WebClient webClient = new WebClient())

{

Uri uri1 = new Uri(PhotoCommentServiceURL);

tasks.Add(webClient.DownloadStringTaskAsync(uri1));

}

using (WebClient webClient = new WebClient())

{

Uri uri2 = new Uri(DynamicImgServiceUrl);

tasks.Add(webClient.DownloadDataTaskAsync(uri2));

}

await Task.WhenAll(tasks);

ViewBag.PhotoComments = ((Task<string>)tasks[0]).Result;

string imageBase64 = Convert.ToBase64String(((Task<byte[]>)tasks[1]).Result);

string imageSrc = string.Format("data:image/jpeg;base64,{0}", imageBase64);

ViewBag.Photo = imageSrc;

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