How to download word/pdf/xls/ppt file in asp.net:

How to download word/pdf/xls/ppt file in asp.net:

public void ProcessRequest(HttpContext context)

 { 

 //context.Response.Write("Hello World"); 

 String sFileName = ""; 

 String sFullPath = String.Empty; 

 sFullPath = context.Request.QueryString["FullPath"]; 

 if (sFullPath != null && sFullPath.Length > 4) 

 { 

if (sFullPath.Contains(@"\")) 

 { 

 if (File.Exists(sFullPath)) 

 { 

 FileInfo _file4View = new FileInfo(sFullPath); 

 context.Response.Buffer = false; 

 context.Response.Clear(); 

 String sContentType = ""; 

 switch (Path.GetExtension(sFullPath).ToLower()) 

 { 

 case ".dwf": 

 sContentType = "Application/x-dwf"; 

 break; 

 case ".pdf": 

 sContentType = "Application/pdf"; 

 break; 

 case ".doc": 

 sContentType = "Application/vnd.ms-word"; 

 break; 

 case ".ppt": 

 case ".pps": 

 sContentType = "Application/vnd.ms-powerpoint"; 

 break; 

 case ".xls": 

 sContentType = "Application/vnd.ms-excel"; 

 break; 

 default: 

 sContentType = "Application/octet-stream"; 

 break; 

 } 

 context.Response.ContentType = sContentType;

 MemoryStream _Stream = new MemoryStream(); 

 //StreamWriter _writer = new StreamWriter(_Stream); 

 FileStream _fileStream = new FileStream(sFullPath, FileMode.Open, FileAccess.Read);

 long fileLength = _fileStream.Length; 

 Byte[] _byte = new Byte[(int)fileLength];

 _fileStream.Read(_byte, 0, (int)fileLength); 

 _fileStream.Close(); 

 context.Response.BinaryWrite(_byte); 

 } 

 } 

 } 

 }