C# 使用WebClient下载文件到本地目录
1、配置本地目录路
<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(10, 99).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();}
转载：https://blog.csdn.net/pan_junbiao/article/details/71856345
