/// <summary>
/// 将文件从服务器下载到本地
/// </summary>
/// <param name="fileName">文件路径</param>
/// <param name="resId">资源id</param>
/// <param name="appId">附件id</param>
public void DownLoad(string fileName, string resId, string appId)
{
using (JSZX_ResourceEntities db = new JSZX_ResourceEntities())
{
Resource res = new Resource();
string userId = CommonUtil.GetSession(Session, "id");
res.AddDownLoadNum(resId, appId, userId, db);
}
string loccalFile = fileName;// Constant.DISK_ADDRESS + fileName;
try
{
if (!System.IO.File.Exists(loccalFile))
{
throw new Exception("文件不存在");
}
//100K 每次读取文件，只读取100K
//const long ChunkSize = 102400;
//byte[] buffer = new byte[ChunkSize];
//HttpContext.Response.Clear();
//FileStream fs = new FileStream(loccalFile, FileMode.Open);
//long dataLengthToRead = fs.Length;//获取下载的文件总大小
#region 20150228 5920 Add 文件ID改成文件原名
fileName = Path.GetFileName(fileName);
Resource res = new Resource();
fileName = res.GetFileOriginalName(fileName);
#endregion
HttpContext.Response.ContentType = "application/octet-stream";
HttpContext.Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(fileName));
Response.TransmitFile(loccalFile);
//while (dataLengthToRead > 0 && HttpContext.Response.IsClientConnected)
//{
// int lengthRead = fs.Read(buffer, 0, Convert.ToInt32(ChunkSize));//读取的大小
// HttpContext.Response.OutputStream.Write(buffer, 0, lengthRead);
// HttpContext.Response.Flush();
// dataLengthToRead = dataLengthToRead - lengthRead;
//}
//HttpContext.Response.Close();
////下载完成
//if (dataLengthToRead == 0)
//{
// if (fs != null)
// {
// fs.Close();
// }
//}
//下载资源时，可以获得积分
PointRule pr = new PointRule();
pr.AddPoint(resId, CommonUtil.GetSession(Session, "id"), "1");
//下载资源时，可以获得积分
}
catch (Exception ex)
{
clsLog.ErrorLog("MineController", "DownLoad", ex.Message);
HttpContext.Response.Write("<script type='text/javascript'>layer.alert(" + ex.Message + ")</script>");
}
}
