Exceptions will leave those in a bad state. Show 6 more comments. Active Oldest Votes. Improve this answer. Community Bot 1 1 1 silver badge. Alexei Levenkov Alexei Levenkov Ok I took your advise and I am now sorting the array before I merge it. Yet the problem still persists and the images it is downloading is still corrupted.
Add a comment. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. Similar principle is used in download manager applications with addition for download resuming. The following approach enables the power of parallel operations on multi-core machines and can be used as a base for download resume.
This is only the base implementation which allows downloading files in chunks in parallel. And now to begin with hands on code. First thing I decided to do is to do is to handle the response stream ranges in a collection of model objects. I could got with dictionary in this case, but using a model class seemed more readable solution. Before we switch to the logic we need to declare a model for a result. We are going to need few infos for the invoker of the download method. I found following properties useful, so I put them as a part of a download result method.
And now to the main stuff. The following method accepts the download url, destination path as well as optional number of parallel downloads and whether you want to skip SSL validation if you are downloading from HTTPS url.
Note: Although you use asynchronous method, it can block the main thread for a while. If you use directly IP instead of domain name, the DownloadFileAsync method will be fully asynchronous. Menu: Homepage Contact. You run the C console app you created in Part 1 of this tutorial , and explore some features of the Visual Studio integrated development environment IDE.
This tutorial is part 2 of a two-part tutorial series. Real-world code involves projects working together in a solution. You can add a class library project to your Calculator app that provides some calculator functions. You can also right-click on the solution in Solution Explorer to add a project from the context menu. In the Add a new project window, type class library in the Search box.
Choose the C Class library project template, and then select Next. On the Configure your new project screen, type the project name CalculatorLibrary , and then select Next. Rename the Class1. To rename the file, you can right-click the name in Solution Explorer and choose Rename , select the name and press F2 , or select the name and click again to type. A message might ask whether you want to rename references to Class1 in the file. It doesn't matter how you answer, because you'll replace the code in a future step.
Now add a project reference, so the first project can use APIs that the new class library exposes. The Reference Manager dialog box appears. The project reference appears under a Projects node in Solution Explorer. In Program. Then, in CalculatorLibrary. DoOperation call doesn't resolve. That's because CalculatorLibrary is in a different namespace. For a fully qualified reference, you could add the CalculatorLibrary namespace to the Calculator.
DoOperation call:. Adding the using directive should let you remove the CalculatorLibrary namespace from the call site, but now there's an ambiguity. Is Calculator the class in CalculatorLibrary , or is Calculator the namespace?
To resolve the ambiguity, rename the namespace from Calculator to CalculatorProgram in Program. On the Additional information screen,. NET 6. Select Create. To resolve the ambiguity, rename the namespace from Calculator to CalculatorProgram in both Program. You can use the.
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