Download the instance code for the file in.net
- 2020-05-27 04:41:54
- OfStack
1. //TransmitFile download
protected void Button_Click(object sender, EventArgs e)
{
/*
Microsoft is Response Object provides 1 A new approach TransmitFile To solve the use of Response.BinaryWrite
Download over 400mb The file time result Aspnet_wp.exe A problem with a process recall that failed to download successfully.
The code is as follows:
*/
Response.ContentType = "application/x-zip-compressed";
Response.AddHeader("Content-Disposition", "attachment;filename=z.zip");
string filename = Server.MapPath("DownLoad/z.zip");
Response.TransmitFile(filename);
}
2. //WriteFile download
protected void Button2_Click(object sender, EventArgs e)
{
/*
using System.IO;
*/
string fileName = "asd.txt";// The file name saved by the client
string filePath = Server.MapPath("DownLoad/aaa.txt");// The path
FileInfo fileInfo = new FileInfo(filePath);
Response.Clear();
Response.ClearContent();
Response.ClearHeaders();
Response.AddHeader("Content-Disposition", "attachment;filename=" + fileName);
Response.AddHeader("Content-Length", fileInfo.Length.ToString());
Response.AddHeader("Content-Transfer-Encoding", "binary");
Response.ContentType = "application/octet-stream";
Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");
Response.WriteFile(fileInfo.FullName);
Response.Flush();
Response.End();
}
3. //WriteFile block download
protected void Button3_Click(object sender, EventArgs e)
{
string fileName = "aaa.txt";// The file name saved by the client
string filePath = Server.MapPath("DownLoad/aaa.txt");// The path
System.IO.FileInfo fileInfo = new System.IO.FileInfo(filePath);
if (fileInfo.Exists == true)
{
const long ChunkSize = 102400;//100K Each time the file is read, only read 100K , which can relieve the pressure on the server
byte[] buffer = new byte[ChunkSize];
Response.Clear();
System.IO.FileStream iStream = System.IO.File.OpenRead(filePath);
long dataLengthToRead = iStream.Length;// Gets the total size of the downloaded file
Response.ContentType = "application/octet-stream";
Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(fileName));
while (dataLengthToRead > 0 && Response.IsClientConnected)
{
int lengthRead = iStream.Read(buffer, 0, Convert.ToInt32(ChunkSize));// Read size
Response.OutputStream.Write(buffer, 0, lengthRead);
Response.Flush();
dataLengthToRead = dataLengthToRead - lengthRead;
}
Response.Close();
}
}
4. // stream download
protected void Button4_Click(object sender, EventArgs e)
{
string fileName = "aaa.txt";// The file name saved by the client
string filePath = Server.MapPath("DownLoad/aaa.txt");// The path
// Download the file as a stream of characters
FileStream fs = new FileStream(filePath, FileMode.Open);
byte[] bytes = new byte[(int)fs.Length];
fs.Read(bytes, 0, bytes.Length);
fs.Close();
Response.ContentType = "application/octet-stream";
// Notifies the browser to download the file instead of opening it
Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8));
Response.BinaryWrite(bytes);
Response.Flush();
Response.End();
}
//----------------------------------------------------------
public void DownloadFile( System.Web.UI.Page WebForm,String FileNameWhenUserDownload ,String FileBody )
{
WebForm.Response.ClearHeaders();
WebForm.Response.Clear();
WebForm.Response.Expires = 0;
WebForm.Response.Buffer = true;
WebForm.Response.AddHeader("Accept-Language", "zh-tw");
//' The file name
WebForm.Response.AddHeader("content-disposition", "attachment; filename='"+System.Web.HttpUtility.UrlEncode(FileNameWhenUserDownload, System.Text.Encoding.UTF8)+"'");
WebForm.Response.ContentType = "Application/octet-stream";
//' The file content
WebForm.Response.Write(FileBody);//-----------
WebForm.Response.End();
}
// The above code is for download 1 Four dynamically generated text files. If the file already exists in the entity path on the server side, the following functions can be used:
public void DownloadFileByFilePath( System.Web.UI.Page WebForm,String FileNameWhenUserDownload ,String FilePath )
{
WebForm.Response.ClearHeaders();
WebForm.Response.Clear();
WebForm.Response.Expires = 0;
WebForm.Response.Buffer = true;
WebForm.Response.AddHeader("Accept-Language", "zh-tw");
// The file name
WebForm.Response.AddHeader("content-disposition", "attachment; filename='" + System.Web.HttpUtility.UrlEncode(FileNameWhenUserDownload, System.Text.Encoding.UTF8) +"'" );
WebForm.Response.ContentType = "Application/octet-stream";
// The file content
WebForm.Response.Write(System.IO.File.Rea}dAllBytes(FilePath));//---------
WebForm.Response.End();
}