Web Document Image Viewer - Installation

public string ServerUrl;
public string SessionId;
public string OpenFileUrl;
public float ThumbHeight = 100;
public float ThumbWidth = 80;
public float DocHeight = 640;
public float DocWidth = 819;
public int PageSizeType = 1;
protected void Page_Load(object sender, EventArgs e)
{
   this.ServerUrl = "/RasterEdge_Imaging_Files/WebHandler.ashx";
   this.SessionId = "RasterEdge" + Session.SessionID;
   this.OpenFileUrl = "OpenServerFile.aspx";
   string method = Request.Form["method"];
   if (method == null || method.Equals(""))
   {
      this.REWebViewer1.DocWidth = DocWidth;
      this.REWebViewer1.DocHeight = DocHeight;
      this.REWebViewer1.ThumbWidth = ThumbWidth;
      this.REWebViewer1.ThumbHeight = ThumbHeight;
      OpenFile();
    }
   else if (method.Equals("OpenFile"))
   {
      OpenFile();
   }
   else if (method.Equals("SaveFile"))
   {
      SaveFile();
   }
}

public void OpenFile()
{
   string uploadFile = Request.Form["uploadfile"];
   if (uploadFile == null || uploadFile.Equals(""))
   {
      string fileName = Request.QueryString["filename"];
      if (fileName == null || fileName.Equals(""))
      {
         this.REWebViewer1.LoadFile("/RasterEdge_Demo_Docs/Sample.pdf",
         this.SessionId);
      }
      else
      {
         this.REWebViewer1.LoadFile(fileName, this.SessionId);
      }
   }
   else
   {
      string filename = "/RasterEdge_Cache/" + uploadFile;
      this.REWebViewer1.LoadFile(filename, this.SessionId);
      //load from stream
      //this.REWebViewer1.LoadFile(stream, this.SessionId);
   }
}

public void SaveFile()
{
   REDocument doc = (REDocument)Session[this.SessionId + "Save"];
   if (doc != null)
   {
      REFile.SaveDocumentFile(doc, "c:/save.pdf", new PDFEncoder());
   }
}