从HP TRIM的桌面客户端获取记录的URL

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using TRIMSDK;
using System.Configuration;
using Microsoft.Win32;
using System.IO;

public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {
        string errormsg = string.Empty;

        //Response.Clear();
        Response.Cache.SetCacheability(HttpCacheability.NoCache);
        Database trim = new Database();
        trim.SetAsWebService();
        trim.Id = ConfigurationSettings.AppSettings[\"dbid\"];
        trim.WorkgroupServerName = ConfigurationSettings.AppSettings[\"wgserver\"];
        trim.WorkgroupServerPort = Int32.Parse(ConfigurationSettings.AppSettings[\"wgport\"]);
        trim.Connect();
        string recno = Request.QueryString[\"recno\"];
        if (String.IsNullOrEmpty(recno))
        {
            errormsg = \"No recno parameter was passed.\";
        }
        else
        {
            Record rec = trim.GetRecord(recno);
            if (rec == null)
            {
                errormsg = string.Format(\"Could not find a record with number \\\"{0}\\\". Either it doesn\'t exist, or you don\'t have permission to view it.\", recno);
            }
            else
            {
                if (!rec.IsElectronic)
                {
                    errormsg = string.Format(\"Record {0} does not have an electronic attachment\", rec.Number);
                }
                else
                {
                    IStream s = rec.GetDocumentStream(null, false, null);

                    Response.ClearHeaders();
                    Response.AddHeader(\"Content-Disposition\", \"filename=\" + rec.SuggestedFileName);
                    Response.AddHeader(\"Content-Length\", rec.DocumentSize.ToString());
                    Response.Buffer = false;
                    Response.ContentType = GetContentType(rec.Extension);

                    uint BufferSize = 10000;
                    uint DocumentLength = (uint)rec.DocumentSize;
                    byte[] buffer = new byte[BufferSize];
                    uint bytesread;
                    uint totalread = 0;

                    Stream outstream = Response.OutputStream;

                    while (totalread < DocumentLength)
                    {
                        s.RemoteRead(out buffer[0], 10000, out bytesread);
                        if (bytesread < 10000)
                        {
                            for (uint i = 0; i < bytesread; i++)
                            {
                                outstream.WriteByte(buffer[i]);
                            }
                        }
                        else
                        {
                            outstream.Write(buffer, 0, 10000);
                        }
                        totalread += bytesread;
                    }
                    outstream.Close();
                    Response.Flush();
                    return;
                }
            }
        }
        Response.Write(errormsg);
    }

    private string GetContentType(string fileExtension)
    {
        string ct = Registry.GetValue(@\"HKEY_CLASSES_ROOT\\.\" + fileExtension.ToLower(), \"Content Type\", string.Empty) as string;

        if (ct.Length == 0)
        {
            ct = \"application/octet-stream\";
        }

        return ct;
    }
}