File downloading

Question

Response.ContentType = dr["projecttype"].ToString();   Response.AddHeader("Content-Disposition", "attachment;filename="+dr["filename"]+"");   Response.BinaryWrite((byte[])dr["size"]);  Response.End();
Can anybody explain these four steps clearly?
they are related to file downloading concept....
plzzzz its needed very quickly...

Iftikar Hussain · Accepted Answer

Hi,
Response.ContentTyp e - The ContentType property specifies the HTTP content type for the response. If no ContentType is specified, the default is text/HTML.
Response.AddHeader - The AddHeader method adds a new HTML header and value to the response sent to the client. It does not replace an existing header of the same name. After a header has been added, it cannot be removed.
Response.BinaryWrite - The BinaryWrite method writes the specified information to the current HTTP output without any character conversion. This method is useful for writing nonstring information, such as binary data required by a custom application.
Response.End - The End method causes the Web server to stop processing the script and return the current result. The remaining contents of the file are not processed.
Regards,
Iftikar

Sreekanth Reddy · Answer

ok.. then how it is going to download the file to our system. internally what happens when these four statements are executing?