What is the equivalent of .Handle (desktop application in C#) in aspx with c# (Visual Studio 2010)

Question

I am using an example given by Ventana System for the Vensim Software. The example is a desktop application in C#. I want to take this example to a web version in C#.

Desktop version

VensimDLLWrapper.vensim_show_sketch(1, 1, 100, (long)pictureBox_Sketch.Handle);

Web version

VensimDLLWrapper.vensim_show_sketch(1, 1, 100, (long)Image1.???);

Answer 1

This is my approach: I create a PictureBox like in Desktop application

        PictureBox pictureBox_Sketch = new PictureBox();
        pictureBox_Sketch.Name = "pictureBox_Sketch";
        pictureBox_Sketch.Size = new System.Drawing.Size(1200, 768);
        pictureBox_Sketch.TabIndex = 19;
        pictureBox_Sketch.TabStop = false;

Then, I put the Image in the Handle.

       VensimDLLWrapper.vensim_show_sketch(1, 1, 100, (long)pictureBox_Sketch.Handle);

Then , I copy to the clipboard the Image:

       VensimDLLWrapper.vensim_tool_command("EXPORT>SK", (long)pictureBox_Sketch.Handle, 0);

Finally, I Save the Image In the Disk (It is clear that I have to use Server.Map or other)

   if (PInvoke.OpenClipboard(pictureBox_Sketch.Handle))
        {
            if (PInvoke.IsClipboardFormatAvailable(14))
            {
                IntPtr ptr = PInvoke.GetClipboardData(14);
                if (!ptr.Equals(new IntPtr(0)))
                {
                    Metafile metafile = new Metafile(ptr, true);
                    metafile.Save("C:\\ruta\\Images\\ModelGraph.png", System.Drawing.Imaging.ImageFormat.Png);
                    //HyperLink1.NavigateUrl = "Images\\ModelGraph.png";
                    // Image1.ImageUrl = "Images\\ModelGraph.emf";

                    //Set the Image Property of PictureBox 

                }
            }
            PInvoke.CloseClipboard();
        }