/// <summary>
/// 下载文件，下载文件进度在Read的时候可以显示
/// </summary>
/// <param name="filename">下载文件名</param>
/// <param name="action">进度0-100</param>
/// <returns>下载成功后返回存储在本地文件路径</returns>
public static string DownLoadFile(string filename, Action <int> action)
{
ChannelFactory <IFileTransfer> mfileChannelFactory = null;
IFileTransfer fileHandlerService = null;
try
{
if (string.IsNullOrEmpty(filename))
{
throw new Exception("文件名不为空！");
}
string filebufferpath = AppGlobal.AppRootPath + @"filebuffer\";
if (!Directory.Exists(filebufferpath))
{
Directory.CreateDirectory(filebufferpath);
}
mfileChannelFactory = new ChannelFactory <IFileTransfer>("fileendpoint");
fileHandlerService = mfileChannelFactory.CreateChannel();
DownFile df = new DownFile();
if (AppGlobal.cache.Contains("WCFClientID"))
{
df.clientId = AppGlobal.cache.GetData("WCFClientID").ToString();
}
df.DownKey = Guid.NewGuid().ToString();
df.FileName = filename;
DownFileResult result = fileHandlerService.DownLoadFile(df);
//mfileChannelFactory.Close();//关闭会话
if (result.IsSuccess)
{
string filepath = filebufferpath + filename;
if (File.Exists(filepath))
{
File.Delete(filepath);
}
FileStream fs = new FileStream(filepath, FileMode.Create, FileAccess.Write);
int oldprogressnum = 0;
decimal progressnum = 0;
long bufferlen = 4096;
int count = 0;
byte[] buffer = new byte[bufferlen];
//设置服务端的下载进度
setDownFileProgress(df.clientId, df.DownKey, (delegate()
{
return(Convert.ToInt32(Math.Ceiling(progressnum)));
}));
while ((count = result.FileStream.Read(buffer, 0, buffer.Length)) > 0)
{
fs.Write(buffer, 0, count);
//获取下载进度
getprogress(result.FileSize, bufferlen, ref progressnum);
if (oldprogressnum < Convert.ToInt32(Math.Ceiling(progressnum)))
{
oldprogressnum = Convert.ToInt32(Math.Ceiling(progressnum));
//setDownFileProgress(df.clientId, df.DownKey, oldprogressnum);//设置服务端的下载进度
if (action != null)
{
action(Convert.ToInt32(Math.Ceiling(progressnum)));
}
}
}
//清空缓冲区
fs.Flush();
//关闭流
fs.Close();
//System.Threading.Thread.Sleep(200);
return(filepath);
}
else
{
throw new Exception("下载文件失败！");
}
}
catch (Exception e)
{
throw new Exception(e.Message + "\n下载文件失败！");
}
finally
{
if (fileHandlerService != null)
{
(fileHandlerService as IContextChannel).Close();
}
if (mfileChannelFactory != null)
{
mfileChannelFactory.Close();
}
}
}
/// <summary>
/// 下载文件，有进度显示
/// </summary>
/// <param name="filename">下载文件名</param>
/// <param name="action">进度0-100</param>
/// <returns>下载成功后返回存储在本地文件路径</returns>
public string DownLoadFile(string filename, Action <int> action)
{
IFileTransfer fileHandlerService = null;
try
{
if (string.IsNullOrEmpty(filename))
{
throw new Exception("文件名不为空！");
}
string filebufferpath = AppRootPath + @"filebuffer\";
if (!Directory.Exists(filebufferpath))
{
Directory.CreateDirectory(filebufferpath);
}
fileHandlerService = mfileChannelFactory.CreateChannel();
DownFile df = new DownFile();
df.clientId = mConn == null ? "" : mConn.ClientID;
df.DownKey = Guid.NewGuid().ToString();
df.FileName = filename;
DownFileResult result = new DownFileResult();
result = fileHandlerService.DownLoadFile(df);
if (result.IsSuccess)
{
string filepath = filebufferpath + filename;
if (File.Exists(filepath))
{
File.Delete(filepath);
}
FileStream fs = new FileStream(filepath, FileMode.Create, FileAccess.Write);
int bufferlen = 4096;
int count = 0;
byte[] buffer = new byte[bufferlen];
if (action != null)
{
getupdownprogress(result.FileStream, result.FileSize, action);//获取进度条
}
while ((count = result.FileStream.Read(buffer, 0, bufferlen)) > 0)
{
fs.Write(buffer, 0, count);
}
//清空缓冲区
fs.Flush();
//关闭流
fs.Close();
return(filepath);
}
else
{
throw new Exception("下载文件失败！");
}
}
catch (Exception e)
{
throw new Exception(e.Message + "\n下载文件失败！");
}
finally
{
if (fileHandlerService != null)
{
(fileHandlerService as IContextChannel).Abort();
}
}
}