in the dotnet framework there are two method for compressing data 1) GZip 2)Deflate

here i am using GZip Stream (System.IO.Compression).

Steps

1) Create Simple Web Application (asp.net with C#). 2) put below control in to page. 2.1) Button (id=”btnCompress”) 3) put below code in to click event of button.

//create one folder in the project (txt) 
//get the folder physical path  
string filepath = Server.MapPath("txt"); 
//create file  
StreamWriter sw = new StreamWriter(filepath + @"\1.txt"); 
sw.WriteLine("we compress this file after few min."); 
sw.Close(); 
//open 1.txt file  
FileStream objFile = File.OpenRead(filepath + @"\" + "1.txt"); 
//create zip file  
FileStream objZipFile = File.Create(filepath + @"\zip.gz");  
//this is compress stream  
System.IO.Compression.GZipStream objGZip = new System.IO.Compression.GZipStream(objZipFile, CompressionMode.Compress); 
//Read Bytes From Destination File 
int bytes = objFile.ReadByte(); 
while (bytes != -1) 
{ 
    //write byte in Compress File 
    objGZip.WriteByte((byte)bytes); 
    bytes = objFile.ReadByte(); 
} 
objGZip.Close(); objZipFile.Close();

Enjoy...

Jay Ganesh