How can the file download function be implemented in C#?

1 year ago
Emily Johnson
1 minute

In C#, the WebClient class can be used to implement file downloading functionality. Here is a simple example code:

using System;
using System.Net;

class Program
{
    static void Main(string[] args)
    {
        string fileUrl = "http://example.com/file.txt";
        string savePath = "C:\\path\\to\\save\\file.txt";

        using (WebClient client = new WebClient())
        {
            try
            {
                client.DownloadFile(fileUrl, savePath);
                Console.WriteLine("文件下载完成！");
            }
            catch (Exception ex)
            {
                Console.WriteLine("文件下载失败：" + ex.Message);
            }
        }
    }
}

In the code above, specify the URL and the save path for the file to be downloaded first. After creating an instance of the WebClient class, call its DownloadFile method, passing in the file’s URL and save path to start the download. If the download fails, handle the exception by catching the Exception.

It is important to note that downloading files is a time-consuming operation, and the above code is executed in the main thread. If this functionality needs to be used in the UI, it is recommended to perform the file download operation in a background thread to avoid blocking the user interface.

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