如何将服务器的一个文件下载到本机?下载文件有大小限制吗??
解决方案 »
- window小常识(防火墙过滤)
- 扫雷思想
- C# winform listView CheckBoxes 全选,反选怎么做
- DateTimePicker與Null的問題!
- 简单背包问题,谁来拯救我
- 才疏学浅,求助,C#调用C++ dll 返回结构体数组指针
- winform使用DotNetSkin美化界面,结果程序崩了,到处都在提示“算术运算导致溢出”,求高手指点呀。。。
- 遇到一个难题,高手们看过来
- 新增用户审核问题(50分)
- 救命啊!
- 在DataGrid中动态添加一ButtonColumn 列后,为什么在 ItemCommand 事件中无法捕捉它的响应?
- 如何在crystal report 中画标准表格,在线等待
WebRequest
response.Clear();
response.WriteFile(strFilePath);
response.ContentType = "application/octet-stream";
string httpHeader="attachment;filename="+"Sales_"+DateTime.Now.ToString("yyyyMMdd")+".xls";
//filename=backup.Xls";
response.AppendHeader("Content-Disposition", httpHeader);
response.Flush(); //System.IO.File.Delete(path + fileName);
response.End();
/// download File From Server's DB
/// </summary>
public void downloadFile(HttpRequest reqst,HttpResponse respon, HttpServerUtility server , string userId,string nodeId,string docId,string version,bool isCheckOut)
{
DataBase db = null;
System.IO.FileStream myFile = null;
//BinaryReader br = null;
respon.Clear(); try
{
db= new DataBase();
db.Open(); // Check the File
this.checkFileExisted( db.Connection , null , nodeId , docId , null );
}
catch( ApplicationException ex )
{
throw ex;
}
catch( Exception ex )
{
throw ex;
}
finally
{
db.Close();
} try
{
db= new DataBase();
db.Open(); // DownLoad File
string sqlText = " SELECT DocName, Content ";
sqlText += " FROM T_DMS_DOC ";
sqlText += " WHERE NodeId ='"+DataBase.SqlItemTextChange(nodeId)+"' ";
sqlText += " AND DocId ='"+DataBase.SqlItemTextChange(docId)+"' ";
sqlText += " AND Version ='"+DataBase.SqlItemTextChange(version)+"' ";
SqlCommand cmd=new SqlCommand(sqlText,db.Connection);
SqlDataReader rd;
// Write Log
LogManager.WriteLog("Execute "+cmd.CommandText);
rd=cmd.ExecuteReader(); while(rd.Read())
{
// Orginal File Name
string fileName = rd["DocName"].ToString(); // Temp File Name with server path
string ServerPath = server.MapPath("TempFile"); // Delete temp , if existed
if(File.Exists(ServerPath))
{
File.Delete(ServerPath);
} // Get File from database
myFile = new System.IO.FileStream(ServerPath,System.IO.FileMode.Create);
myFile.Write(((byte[])rd["Content"]),0,((byte[])rd["Content"]).Length); #region New Source
// Write file into harddisk
StreamWriter swMyFile = new StreamWriter( myFile ) ;
swMyFile.WriteLine("") ;
swMyFile.Flush() ;
swMyFile.Close() ;
myFile.Close() ; // Get Temp File info
FileInfo fi = new FileInfo(ServerPath); // determine the name and size of the file
string filename = fi.Name;
string filesize = fi.Length.ToString();
fi = null; // clear the response, set the contenttype and the file name/size
respon.Clear();
respon.ContentType = "application/octet-stream";
respon.AppendHeader("Content-Disposition", "attachment; filename=" + server.UrlEncode(fileName) + @"");
respon.AppendHeader ("Content-Length", filesize); // flush the response, then send the file down
respon.Flush();
respon.WriteFile(ServerPath);
#endregion #region Old Source
// br = new BinaryReader(myFile);
//
// //respon.Clear();
// respon.AddHeader("Accept-Ranges", "bytes");
// respon.Buffer = false;
// long fileLength = myFile.Length;
// long startBytes = 0;
//
// int pack = 10240; //10K bytes
// //int sleep = 200;
// int sleep = (int)Math.Floor(1000 * pack / 1048576) + 1;
// if (reqst.Headers["Range"] != null)
// {
// respon.StatusCode = 206;
// string[] range = reqst.Headers["Range"].Split(new char[] {'=', '-'});
// startBytes = Convert.ToInt64(range[1]);
// }
// respon.AddHeader("Content-Length", (fileLength - startBytes).ToString());
// if (startBytes != 0)
// {
// respon.AddHeader("Content-Range", string.Format(" bytes {0}-{1}/{2}", startBytes, fileLength-1, fileLength));
// }
//
// respon.AddHeader("Connection", "Keep-Alive");
// respon.ContentType = "application/octet-stream";
// respon.AddHeader("Content-Disposition","attachment;filename=" + HttpUtility.UrlEncode(fileName,System.Text.Encoding.UTF8).Replace("+"," ") );
//
// br.BaseStream.Seek(startBytes, SeekOrigin.Begin);
// int maxCount = (int) Math.Floor((fileLength - startBytes) / pack) + 1;
//
// respon.Flush();
//
// for (int i = 0; i < maxCount; i++)
// {
// if (respon.IsClientConnected)
// {
// respon.BinaryWrite(br.ReadBytes(pack));
// Thread.Sleep(sleep);
// }
// else
// {
// i=maxCount;
// }
// }
//
// br.Close();
// myFile.Close();
#endregion
} rd.Close();
db.Close();
}
catch(ApplicationException ex)
{
throw ex;
}
catch(Exception ex)
{
throw ex;
}
finally
{
// db.Close();
respon.End();
}
}