ASP.NET

using System;

using System.Web;

namespace Example

{

  public class PDFServer : IHttpHandler

  {

    /// <summary>

    ///  Signals whether the instance of the HttpHandler is reusable

    ///  accross requests.

    /// </summary>

    ///

    /// <value>True if the instance is reusable, False otherwise</value>

    ///

    public bool IsReusable

    {

      get

      {

        return true;

      }

    } // End property IsReusable

    /// <summary>

    ///  Performs the needed processing and rendering for an Http Request.

    /// </summary>

    ///

    /// <param name = "context">The Http contect for the request</param>

    ///

    public void ProcessRequest(HttpContext context)

    {

        // Grab the document id from the query string and use it to determine

        // the document name and the path.

        string docId  = context.Request.Params["docId"];

        string docName = DetermineDocumentName(docId);

        string path    = DetermineDocumentPath(docId);

        // Set the response header to suggest a default file name.

        context.Response.AppendHeader(String.Format("content-disposition","attachment; filename={0}", docName));

        // Set the appropriate MIME type for a PDF file.

        context.Response.ContentType = "application/pdf";

        // Read the file directly to the response stream, then end the response.

        context.Response.WriteFile(path);

        context.Response.End();

    } // End method ProcessRequest

  } // End class PDFServer

} // End namespace Example