C#使用WebClient下载文件到本地目录。
1、配置本地目录路径
<appSettings>
<!--文件下载目录-->
<add key="Download_Dic" value="E:\MyDownloadFile\"/>
</appSettings>
2、创建FileHandler.cs类，编写下载代码
/// <summary>
/// 文件处理类
/// </summary>
public static class FileHandler
{
/// <summary>
/// 文件下载目录
/// </summary>
private static string _directory = @ConfigurationSettings.AppSettings["Download_Dic"]; /// <summary>
/// 下载文件
/// </summary>
/// <param name="url">下载地址</param>
/// <returns>文件名称</returns>
public static string DownloadFile(string url)
{
try
{
string fileName = CreateFileName(url);
if (!Directory.Exists(_directory))
{
Directory.CreateDirectory(_directory);
}
WebClient client = new WebClient();
client.DownloadFile(url, _directory + fileName);
return fileName;
}
catch
{
return "";
}
} /// <summary>
/// 创建文件名称
/// </summary>
public static string CreateFileName(string url)
{
string fileName = "";
string fileExt = url.Substring(url.LastIndexOf(".")).Trim().ToLower();
Random rnd = new Random();
fileName = DateTime.Now.ToString("yyyyMMddHHmmssfff") + rnd.Next(, ).ToString() + fileExt;
return fileName;
} }
3、调用测试
static void Main(string[] args)
{
string url = "https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1494677827304&di=8e8aaf1a717ae37b73b772ee4728c7ea&imgtype=0&src=http%3A%2F%2Fscimg.jb51.net%2Fallimg%2F141123%2F10-1411231F92W16.jpg";
string fileName = FileHandler.DownloadFile(url);
if (!String.IsNullOrEmpty(fileName))
{
Console.WriteLine("文件下载成功，文件名称：" + fileName);
}
else
{
Console.WriteLine("文件下载失败");
}
Console.ReadLine();
}