1
FileStream file = File.CreatWrite(filePath);                          // 创建文件
2

3
WebRequest.Creat(url).GetResponse().GetResponseStream().CopyTo(file); // 创建WebRequest对象,获取响应,获取响应流,将响应流写入到文件流
4

5
file.Close();                                                         //关闭文件

1
bool DownloadFile(string url, string toDirectory, string fileName, int timeout = 2000)    //返回值是是否下载成功
2
{
3
    string PathCombine(string path1,string path2)    //合成路径
4
    {
5
        if (path1.EndsWith("\\"))
6
        {
7
            path1 = path1.Substring(0, path1.Length - 1);
8
        }
9
        if (path2.StartsWith("\\"))
10
        {
11
            path2 = path2.Substring(1);
12
        }
13
        return path1 + "\\" + path2;
14
    }
15

16
    if(!Directory.Exists(toDirectory))
17
    {
18
        Directory.CreatDirectory(toDirectory);
19
    }
20

21
    FileStream file = File.OpenWrite(fileName);
22
    WebRequest request = WebRequest.Creat(url);
23
    request.Timeout = timeout; //设置请求超时为函数参数
24

25
    try
26
    {
27
        request.GetResponse().GetResponseStream().CopyTo(file);
28
    }
29
    catch
30
    {
31
        return false;
32
    }
33

34
    file.Close();
35
    return true;