System.IO.Stream iStream =null; // Buffer to read 10K bytes in chunk: byte[] buffer =new Byte[10240]; // Length of the file: int length; // Total bytes to read: long dataToRead; // Identify the file to download including its path. string filepath =@"E:\software\SQL Server 2000 Personal Edition.ISO"; // Identify the file name. string filename = System.IO.Path.GetFileName(filepath); try { // Open the file. iStream =new System.IO.FileStream(filepath, System.IO.FileMode.Open, System.IO.FileAccess.Read,System.IO.FileShare.Read); Response.Clear(); // Total bytes to read: dataToRead = iStream.Length; long p =0; if(Request.Headers["Range"]!=null) { Response.StatusCode =206; p =long.Parse( Request.Headers["Range"].Replace("bytes=","").Replace("-","")); } if(p !=0) { Response.AddHeader("Content-Range","bytes "+ p.ToString() +"-"+ ((long)(dataToRead -1)).ToString() +"/"+ dataToRead.ToString()); } Response.AddHeader("Content-Length",((long)(dataToRead-p)).ToString()); Response.ContentType ="application/octet-stream"; Response.AddHeader("Content-Disposition", "attachment; filename="+ System.Web.HttpUtility.UrlEncode(Request.ContentEncoding.GetBytes(filename))); iStream.Position = p; dataToRead = dataToRead - p; // Read the bytes. while (dataToRead >0) { // Verify that the client is connected. if (Response.IsClientConnected) { // Read the data in buffer. length = iStream.Read(buffer, 0, 10240); // Write the data to the current output stream. Response.OutputStream.Write(buffer, 0, length); // Flush the data to the HTML output. Response.Flush(); buffer=new Byte[10240]; dataToRead = dataToRead - length; } else { //prevent infinite loop if user disconnects dataToRead =-1; } } } catch (Exception ex) { // Trap the error, if any. Response.Write("Error : "+ ex.Message); } finally { if (iStream !=null) { //Close the file. iStream.Close(); } Response.End(); } 本解决方案所参考的资料链接列表(在此对作者表示感谢): http://blog.csdn.net/playyuer/archive/2004/08/02/58430.aspx http://www.httpsniffer.com/http/1416.htm http://support.microsoft.com/default.aspx?scid=kb;en-us;812406&Product=aspnet 出处:http://www.cnblogs.com/bestcomy/archive/2004/08/10/31950.aspx
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2007-01-24 09:11投石问路
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