1.HttpWebResponse方法
cs
public void GetPostContent(string url, string localSavePath)
{
try
{
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(url);
myRequest.Method = "GET";
myRequest.ContentType = "application/x-www-form-urlencoded";
myRequest.Proxy = null;
// Get response
HttpWebResponse myResponse = (HttpWebResponse)myRequest.GetResponse();
Stream responseStream = myResponse.GetResponseStream();
Stream stream = new FileStream(localSavePath, FileMode.Create);
byte[] bArr = new byte[1024];
int size = responseStream.Read(bArr, 0, (int)bArr.Length);
while (size > 0)
{
stream.Write(bArr, 0, size);
size = responseStream.Read(bArr, 0, (int)bArr.Length);
}
stream.Close();
responseStream.Close();
}
catch (System.Exception ex)
{
throw ex;
}
}
2.HttpClient方法
cs
public static async void DownloadFile(string url, string filePath)
{
try
{
using (HttpClient client = new HttpClient())
{
HttpResponseMessage response = await client.GetAsync(url, HttpCompletionOption.ResponseHeadersRead);
response.EnsureSuccessStatusCode(); // 确保HTTP成功状态值
// 读取响应内容并保存到文件
using (Stream contentStream = await response.Content.ReadAsStreamAsync(),
fileStream = File.Create(filePath))
{
await contentStream.CopyToAsync(fileStream);
}
Console.WriteLine("文件下载完成。");
}
}
catch (HttpRequestException e)
{
MessageBox.Show(e.ToString());
}
}