C#winform 实现从服务器下载

来源：互联网发布：淘宝良心的文具店编辑：程序博客网时间：2024/06/05 18:35
      /// <summary>        /// 下载服务器文件至客户端        /// </summary>        /// <param name="strUrlFilePath">要下载的Web服务器上的文件地址（全路径）</param>        /// <param name="Dir">下载到的目录（存放位置，机地机器文件夹）</param>        /// <returns>True/False是否上传成功</returns>        public bool DownLoadFile(string strUrlFilePath, string strLocalDirPath)        {            // 创建WebClient实例            WebClient client = new WebClient();            //被下载的文件名            string fileName = strUrlFilePath.Substring(strUrlFilePath.LastIndexOf("/"));            //另存为的绝对路径＋文件名            string Path = strLocalDirPath + fileName;            try            {                WebRequest myWebRequest = WebRequest.Create(strUrlFilePath);            }            catch (Exception exp)            {                MessageBox.Show("文件下载失败：" + exp.Message, "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Information);            }            try            {                client.DownloadFile(strUrlFilePath, Path);                return true;            }            catch (Exception exp)            {                MessageBox.Show("文件下载失败：" + exp.Message, "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Information);                return false;            }        }        /// <summary>        /// 下载带进度条代码（普通进度条）        /// </summary>        /// <param name="URL">网址</param>        /// <param name="Filename">文件名</param>        /// <param name="Prog">普通进度条ProgressBar</param>        /// <returns>True/False是否下载成功</returns>        public bool DownLoadFile(string URL, string Filename, ProgressBar Prog)        {            try            {                System.Net.HttpWebRequest Myrq = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(URL); //从URL地址得到一个WEB请求                   System.Net.HttpWebResponse myrp = (System.Net.HttpWebResponse)Myrq.GetResponse(); //从WEB请求得到WEB响应                   long totalBytes = myrp.ContentLength; //从WEB响应得到总字节数                   Prog.Maximum = (int)totalBytes; //从总字节数得到进度条的最大值                   System.IO.Stream st = myrp.GetResponseStream(); //从WEB请求创建流（读）                   System.IO.Stream so = new System.IO.FileStream(Filename, System.IO.FileMode.Create); //创建文件流（写）                   long totalDownloadedByte = 0; //下载文件大小                   byte[] by = new byte[1024];                int osize = st.Read(by, 0, (int)by.Length); //读流                   while (osize > 0)                {                    totalDownloadedByte = osize + totalDownloadedByte; //更新文件大小                       Application.DoEvents();                    so.Write(by, 0, osize); //写流                       Prog.Value = (int)totalDownloadedByte; //更新进度条                       osize = st.Read(by, 0, (int)by.Length); //读流                   }                so.Close(); //关闭流                st.Close(); //关闭流                return true;           }            catch            {                return false;            }        }        /// <summary>        /// 下载带进度条代码(状态栏式进度条）        /// </summary>        /// <param name="URL">网址</param>        /// <param name="Filename">文件名</param>        /// <param name="Prog">状态栏式进度条ToolStripProgressBar</param>        /// <returns>True/False是否下载成功</returns>        public bool DownLoadFile(string URL, string Filename, ToolStripProgressBar Prog)        {            try            {                System.Net.HttpWebRequest Myrq = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(URL); //从URL地址得到一个WEB请求                   System.Net.HttpWebResponse myrp = (System.Net.HttpWebResponse)Myrq.GetResponse(); //从WEB请求得到WEB响应                   long totalBytes = myrp.ContentLength; //从WEB响应得到总字节数                   Prog.Maximum = (int)totalBytes; //从总字节数得到进度条的最大值                   System.IO.Stream st = myrp.GetResponseStream(); //从WEB请求创建流（读）                   System.IO.Stream so = new System.IO.FileStream(Filename, System.IO.FileMode.Create); //创建文件流（写）                   long totalDownloadedByte = 0; //下载文件大小                   byte[] by = new byte[1024];                int osize = st.Read(by, 0, (int)by.Length); //读流                   while (osize > 0)                {                    totalDownloadedByte = osize + totalDownloadedByte; //更新文件大小                       Application.DoEvents();                    so.Write(by, 0, osize); //写流                       Prog.Value = (int)totalDownloadedByte; //更新进度条                       osize = st.Read(by, 0, (int)by.Length); //读流                   }                so.Close(); //关闭流                   st.Close(); //关闭流                   return true;            }            catch            {                return false;            }        }        public void startProcess(string fileName)        {            //定义一个ProcessStartInfo实例            System.Diagnostics.ProcessStartInfo info = new System.Diagnostics.ProcessStartInfo();            //设置启动进程的初始目录            info.WorkingDirectory = Application.StartupPath;            //设置启动进程的应用程序或文档名            info.FileName = @fileName;            //设置启动进程的参数            info.Arguments = "";            //启动由包含进程启动信息的进程资源            try            {                System.Diagnostics.Process.Start(info);            }            catch (System.ComponentModel.Win32Exception we)            {                MessageBox.Show(this, we.Message);                return;            }        }
0 0