[Resolved] Print margins problem

[empika]

Hi there

I am having issues with getting print preview to work reliably with C#.
I have viewed the help files/docs on msdn and scoured many other articles on the web, its quite tricky to piece together how printing is meant to work as there is a lack of documentation on the issue however i have struggled on to finally get my little app working to some degree only to find what i think is a possible bug! (but probly bad code on my behalf)

I am making a windows forms app that has a rich text box, some buttons to print preview/page settings/print and also a print preview.
The problem arises when i open the page settings dialog, every time i open this the settings for the margins are changed to be made smaller, this even happens if myPageSetupDialog.AllowMargins = false.
I am fairly sure that this is not down to my code as i do not touch the margins in anyway except when the printPage event is fired and i print a line with the MarginBounds settings.
I dont think the values of the margins should be changing at all.

namespace SimplePrinting
{
	public class Form1 : System.Windows.Forms.Form
	{
		private System.ComponentModel.Container components = null;
		private PrintDocument myPrintDoc = new PrintDocument();
		private System.Windows.Forms.RichTextBox richTextBox1;
		private PrintPreviewDialog myPrintPreviewDialog = new PrintPreviewDialog();
		private PrintDialog myPrintDialog = new PrintDialog();
		private PageSettings myPageSettings = new PageSettings();
		private System.Windows.Forms.PrintPreviewControl printPreviewControl1;
		private System.Windows.Forms.Button btnUpdate;
		private System.Windows.Forms.ComboBox comboPrinters;
		PrinterSettings myPrinterSettings = new PrinterSettings();
		
		public Form1()
		{
			myPrintDoc.PrintPage += new PrintPageEventHandler(myPrintDoc_PrintPage);
			

			MenuItem fileMenuItem = new MenuItem("&File");
			MenuItem filePageSetupMenuItem = new MenuItem("Page Set&up...", 
				new EventHandler(filePageSetupMenuItem_Click));
			MenuItem filePrintPreviewMenuItem = new MenuItem("Print Pre&view", 
				new EventHandler(filePrintPreviewMenuItem_Click));
			MenuItem filePrintMenuItem = new MenuItem("&Print...", 
				new EventHandler(filePrintMenuItem_Click), Shortcut.CtrlP);

			fileMenuItem.MenuItems.Add(filePageSetupMenuItem);
			fileMenuItem.MenuItems.Add(filePrintPreviewMenuItem);
			fileMenuItem.MenuItems.Add(filePrintMenuItem);

			this.Menu = new MainMenu();
			this.Menu.MenuItems.Add(fileMenuItem);
			InitializeComponent();

		}

		
		private void Form1_Load(object sender, System.EventArgs e) {
			richTextBox1.LoadFile("C:\\Temp\\test.rtf");
			fillComboPrinters();
		}
//- Event Handlers for the menu --------------
		private void filePageSetupMenuItem_Click(Object sender, EventArgs e){
			//Page Setup event handler
			PageSetupDialog myPageSetupDialog = new PageSetupDialog();
			myPageSetupDialog.PageSettings = myPageSettings;
			myPageSetupDialog.PrinterSettings = myPrinterSettings;
			myPageSetupDialog.AllowOrientation = true;
			myPageSetupDialog.AllowMargins = true;
			myPageSetupDialog.AllowPrinter = true;
			

			if(myPageSetupDialog.ShowDialog() == DialogResult.OK){
				myPrintDoc.DefaultPageSettings = myPageSetupDialog.PageSettings;
				myPageSettings = myPageSetupDialog.PageSettings;
				printPreviewControl1.Document = myPrintDoc;
			}
		}

		private void filePrintPreviewMenuItem_Click(Object sender, EventArgs e){
			//Print Preview event handler
			myPrintDoc.DefaultPageSettings = myPageSettings;
			myPrintPreviewDialog.Document = myPrintDoc;
			myPrintPreviewDialog.ShowDialog();

		}

		private void filePrintMenuItem_Click(Object sender, EventArgs e){
			//Print event handler
			//myPrintDoc.Print() will fire off the newly defined
			//myPrintDoc_PrintPage() event where we make the content to send.
			//but first we set the documents print settings
			//then we set the printdialogs document
			//otherwise it doesnt know what the fsck is going on!
			//then finally show the print dialog box
			myPrintDoc.DefaultPageSettings = myPageSettings;
			myPrintDialog.Document = myPrintDoc;
			if(myPrintDialog.ShowDialog() == DialogResult.OK){
				myPrintDoc.Print();
			}
		}
//- End of menu Event Handlers --------------------


		private void myPrintDoc_PrintPage(Object sender, PrintPageEventArgs e){
			//PrintPage event handler, here we acctually print stuff
			//using the PrintPageEventArgs object.
			//its .Graphics property represents a print page and we
			//can use its methods to print stuff!
			
			Brush myBrush = new SolidBrush(richTextBox1.ForeColor);
			//set the margins
			int leftMargin = e.MarginBounds.Left;
			int topMargin = e.MarginBounds.Top;
			int y = 0;
			
			foreach(String line in richTextBox1.Lines){
				e.Graphics.DrawString (line, richTextBox1.Font, myBrush, leftMargin, topMargin + y);
				y +=15;
				
				if(y >= e.MarginBounds.Bottom){
					e.HasMorePages = true;
					y = 0;
					return;
				}
				else{
					e.HasMorePages = false;
				}
			}
		}

		private void btnUpdate_Click(object sender, System.EventArgs e) {
			printPreviewControl1.Document = null;
			myPrintDoc.DefaultPageSettings = myPageSettings;
			printPreviewControl1.Document = myPrintDoc;
		}

		private void comboInstalledPrinters_SelectionChanged(object sender, System.EventArgs e) {
			System.Console.WriteLine("Combo changed!");
			if(comboPrinters.SelectedIndex != -1){
				myPrintDoc.PrinterSettings.PrinterName = comboPrinters.Text;
				myPrinterSettings.PrinterName = comboPrinters.Text;
				myPageSettings.PrinterSettings.PrinterName = comboPrinters.Text;
			}
		}

		private void fillComboPrinters(){
			string strCurPrinter = null;
			for(int i = 0;  i < PrinterSettings.InstalledPrinters.Count -1; i++){
				strCurPrinter = PrinterSettings.InstalledPrinters[i];
				comboPrinters.Items.Add(strCurPrinter);
				System.Console.WriteLine(strCurPrinter);
			}
		}
	}
}

this is really just a tarted up version of http://www.ondotnet.com/pub/a/dotnet.../printing.html which i would have thought would work, but i still get this funny anomaly.


any help would be much appreciated

thanks alot
Eddy Parris