RichTextBox打印和打印成图片代码,CSharp代码库,德仔网

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【CSharp】 RichTextBox打印和打印成图片
作者:zgke / 发布于2014/7/29/ 462

	这里类把RICHTEXTBOX的内容打印到DOCUMENT里

	using System;
	using System.Collections.Generic;
	using System.Text;
	using System.Windows.Forms;
	using System.Drawing.Printing;
	using System.Runtime.InteropServices;

	namespace WindowsApplication3.ControlPrint.PrintClass
	{
	 public class MyRichTextBox
	 {
	 /* 使用方式
	 ControlPrint.PrintClass.MyRichTextBox MyText= new WindowsApplication3.ControlPrint.PrintClass.MyRichTextBox(richTextBox1);
	 ControlPrint.PrintClass.PrintControllerFile PrintControll = new WindowsApplication3.ControlPrint.PrintClass.PrintControllerFile();
	 MyText.Document.DefaultPageSettings.Margins.Bottom = 0;
	 MyText.Document.DefaultPageSettings.Margins.Left = 0;
	 MyText.Document.DefaultPageSettings.Margins.Right = 0;
	 MyText.Document.DefaultPageSettings.Margins.Top = 0; //设置边局
	 MyText.Document.PrintController = PrintControll;

	 MyText.Document.Print();

	 for (int i = 0; i != PrintControll.Image.Count; i++)
	 {
	 PrintControll.Image[i].Save(@"C:/" + i.ToString() + ".emf");
	 }
	 */
	 private int checkPrint = 0;
	 private RichTextBoxPrintCtrl _RichTextBox;
	 private PrintDocument _PrintDocument = new PrintDocument();
	 public PrintDocument Document { get { return _PrintDocument; } }
	
	 public MyRichTextBox(RichTextBox MyRichTextBox)
	 {
	 _RichTextBox = new RichTextBoxPrintCtrl();
	 _RichTextBox.Rtf = MyRichTextBox.Rtf;
	 _PrintDocument.BeginPrint += new PrintEventHandler(_PrintDocument_BeginPrint);
	 _PrintDocument.PrintPage += new PrintPageEventHandler(_PrintDocument_PrintPage);
	 }

	 void _PrintDocument_PrintPage(object sender, PrintPageEventArgs e)
	 {
	 checkPrint = _RichTextBox.Print(checkPrint, _RichTextBox.TextLength, e);

	 if (checkPrint < _RichTextBox.TextLength)
	 e.HasMorePages = true;
	 else
	 e.HasMorePages = false;
	 }
	 void _PrintDocument_BeginPrint(object sender, PrintEventArgs e)
	 {
	 checkPrint = 0;
	 }
	
	 private class RichTextBoxPrintCtrl : RichTextBox
	 {
	 //Convert the unit used by the .NET framework (1/100 inch)
	 //and the unit used by Win32 API calls (twips 1/1440 inch)
	 private const double anInch = 14.4;

	 [StructLayout(LayoutKind.Sequential)]
	 private struct RECT
	 {
	 public int Left;
	 public int Top;
	 public int Right;
	 public int Bottom;
	 }

	 [StructLayout(LayoutKind.Sequential)]
	 private struct CHARRANGE
	 {
	 public int cpMin; //First character of range (0 for start of doc)
	 public int cpMax; //Last character of range (-1 for end of doc)
	 }

	 [StructLayout(LayoutKind.Sequential)]
	 private struct FORMATRANGE
	 {
	 public IntPtr hdc; //Actual DC to draw on
	 public IntPtr hdcTarget; //Target DC for determining text formatting
	 public RECT rc; //Region of the DC to draw to (in twips)
	 public RECT rcPage; //Region of the whole DC (page size) (in twips)
	 public CHARRANGE chrg; //Range of text to draw (see earlier declaration)
	 }

	 private const int WM_USER = 0x0400;
	 private const int EM_FORMATRANGE = WM_USER + 57;

	 [DllImport("USER32.dll")]
	 private static extern IntPtr SendMessage(IntPtr hWnd, int msg, IntPtr wp, IntPtr lp);

	 /// <summary>
	 ///
	 /// </summary>
	 /// <param name="charFrom">页号</param>
	 /// <param name="charTo">文字长度</param>
	 /// <param name="e">打印</param>
	 /// <returns></returns>
	 public int Print(int charFrom, int charTo, PrintPageEventArgs e)
	 {
	 //Calculate the area to render and print
	 RECT rectToPrint;
	 rectToPrint.Top = (int)(e.MarginBounds.Top * anInch);
	 rectToPrint.Bottom = (int)(e.MarginBounds.Bottom * anInch);
	 rectToPrint.Left = (int)(e.MarginBounds.Left * anInch);
	 rectToPrint.Right = (int)(e.MarginBounds.Right * anInch);

	 //Calculate the size of the page
	 RECT rectPage;
	 rectPage.Top = (int)(e.PageBounds.Top * anInch);
	 rectPage.Bottom = (int)(e.PageBounds.Bottom * anInch);
	 rectPage.Left = (int)(e.PageBounds.Left * anInch);
	 rectPage.Right = (int)(e.PageBounds.Right * anInch);

	
	 IntPtr hdc = e.Graphics.GetHdc();

	 FORMATRANGE fmtRange;
	 fmtRange.chrg.cpMax = charTo; //Indicate character from to character to
	 fmtRange.chrg.cpMin = charFrom;
	 fmtRange.hdc = hdc; //Use the same DC for measuring and rendering
	 fmtRange.hdcTarget = hdc; //Point at printer hDC
	 fmtRange.rc = rectToPrint; //Indicate the area on page to print
	 fmtRange.rcPage = rectPage; //Indicate size of page

	 IntPtr res = IntPtr.Zero;

	 IntPtr wparam = IntPtr.Zero;
	 wparam = new IntPtr(1);

	 //Get the pointer to the FORMATRANGE structure in memory
	 IntPtr lparam = IntPtr.Zero;
	 lparam = Marshal.AllocCoTaskMem(Marshal.SizeOf(fmtRange));
	 Marshal.StructureToPtr(fmtRange, lparam, false);

	 //Send the rendered data for printing
	 res = SendMessage(Handle, EM_FORMATRANGE, wparam, lparam);

	 //Free the block of memory allocated
	 Marshal.FreeCoTaskMem(lparam);

	 //Release the device context handle obtained by a previous call
	 e.Graphics.ReleaseHdc(hdc);
	
	 //Return last + 1 character printer
	 return res.ToInt32();
	 }

	 }

	
	 }
	}
	下面的内把PRINTDOCUMENT里的图形

	using System;
	using System.Drawing;
	using System.Drawing.Imaging;
	using System.Drawing.Printing;
	using System.Collections.Generic;
	using System.Diagnostics;

	namespace WindowsApplication3.ControlPrint.PrintClass
	{
	 /// <summary>
	 /// 打印到图形类
	 /// </summary>
	 internal class PrintControllerFile : PreviewPrintController
	 {
	 private IList<Image> _Image = new List<Image>();
	 /// <summary>
	 /// 获取打印的图形
	 /// </summary>
	 public IList<Image> Image { get {return _Image; } }

	 public override void OnEndPage(PrintDocument document, PrintPageEventArgs e)
	 {
	 base.OnEndPage(document, e);

	
	 PreviewPageInfo[] PageInfos = GetPreviewPageInfo();
	 PreviewPageInfo PageInfo = PageInfos[PageInfos.Length - 1];
	 _Image.Add(PageInfo.Image);
	 //_Metafile = (Metafile)MyImage;
	
	 }
	
	

	
	 }
	}
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　RichTextBox　　打印成图片　　 RichTextBox打印　
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