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在C#中,有多种方法可以下载文件。下面是其中几种常见的方法:
- 使用WebClient类:
string url = "http://example.com/file.txt"; string savePath = "C:\\downloads\\file.txt"; using (WebClient client = new WebClient()) { client.DownloadFile(url, savePath); }
- 使用HttpClient类:
string url = "http://example.com/file.txt"; string savePath = "C:\\downloads\\file.txt"; using (HttpClient client = new HttpClient()) { using (HttpResponseMessage response = await client.GetAsync(url)) { using (Stream stream = await response.Content.ReadAsStreamAsync()) { using (FileStream fileStream = new FileStream(savePath, FileMode.Create)) { await stream.CopyToAsync(fileStream); } } } }
- 使用WebRequest和WebResponse类:
string url = "http://example.com/file.txt"; string savePath = "C:\\downloads\\file.txt"; WebRequest request = WebRequest.Create(url); WebResponse response = request.GetResponse(); using (Stream stream = response.GetResponseStream()) { using (FileStream fileStream = new FileStream(savePath, FileMode.Create)) { stream.CopyTo(fileStream); } } response.Close();
请注意,以上代码示例中的URL和保存路径应根据实际情况进行更改。另外,下载文件时可能需要处理一些异常情况,例如网络连接失败或文件无法访问等。