C＃打印（RichTextBox）

我想打印我的RichTextBox（eintragRichTextBox）的内容我现在有了这段代码：

private void druckenPictureBox_Click(object sender, EventArgs e) { PrintDialog printDialog = new PrintDialog(); PrintDocument documentToPrint = new PrintDocument(); printDialog.Document = documentToPrint; if (printDialog.ShowDialog() == DialogResult.OK) { StringReader reader = new StringReader(eintragRichTextBox.Text); documentToPrint.Print(); documentToPrint.PrintPage += new PrintPageEventHandler(DocumentToPrint_PrintPage); } } private void DocumentToPrint_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e) { StringReader reader = new StringReader(eintragRichTextBox.Text); float LinesPerPage = 0; float YPosition = 0; int Count = 0; float LeftMargin = e.MarginBounds.Left; float TopMargin = e.MarginBounds.Top; string Line = null; Font PrintFont = this.eintragRichTextBox.Font; SolidBrush PrintBrush = new SolidBrush(Color.Black); LinesPerPage = e.MarginBounds.Height / PrintFont.GetHeight(e.Graphics); while (Count < LinesPerPage && ((Line = reader.ReadLine()) != null)) { YPosition = TopMargin + (Count * PrintFont.GetHeight(e.Graphics)); e.Graphics.DrawString(Line, PrintFont, PrintBrush, LeftMargin, YPosition, new StringFormat()); Count++; } if (Line != null) { e.HasMorePages = true; } else { e.HasMorePages = false; } PrintBrush.Dispose(); } 

但它总是打印我一个空白的网站:( ..任何人的想法，为什么它不工作？或有一个更好的代码/想法如何我可以实现打印？

编辑：看看答案

Answer 1

得到它了..

在这个地方：

 if (printDialog.ShowDialog() == DialogResult.OK) { StringReader reader = new StringReader(eintragRichTextBox.Text); documentToPrint.Print(); documentToPrint.PrintPage += new PrintPageEventHandler(DocumentToPrint_PrintPage); } 

我改为：

 if (printDialog.ShowDialog() == DialogResult.OK) { StringReader reader = new StringReader(eintragRichTextBox.Text); documentToPrint.PrintPage += new PrintPageEventHandler(DocumentToPrint_PrintPage); documentToPrint.Print(); } 

现在它工作正常..

此外，如果有人需要打印RichTextBox的内容，您可以使用我的代码..

Answer 2

我试过如何打印RichTextBox控件的内容，它就像一个魅力。

您只需要创建一个自定义的RichTextBox ，然后它将如此快速地打印整个文本，并保持在纸上的风格！

用于创建自定义RichTextBox代码

 using System; using System.Windows.Forms; using System.Drawing; using System.Runtime.InteropServices; using System.Drawing.Printing; namespace RichTextBoxPrintCtrl { public 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); // Render the contents of the RichTextBox for printing // Return the last character printed + 1 (printing start from this point for next page) 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(); } } } 

主要来源包括PrintDialog, PrintPreviewDialog, PrintDocument, and PageSetupDialog ，但只有一个PrintDocument控件才能正常工作。 所以我删除了一些额外的代码只是为了缩短有用的部分。 但如果您对使用它们感兴趣，可以在链接页面中找到完整代码。

  private PrintDocument _printDocument = new PrintDocument(); private int _checkPrint; public Form1() { InitializeComponent(); _printDocument.BeginPrint += _printDocument_BeginPrint; _printDocument.PrintPage += _printDocument_PrintPage; } private void btnPrint_Click(object sender, EventArgs e) { PrintDialog printDialog=new PrintDialog(); if (printDialog.ShowDialog() == DialogResult.OK) _printDocument.Print(); } private void _printDocument_PrintPage(object sender, PrintPageEventArgs e) { // Print the content of RichTextBox. Store the last character printed. _checkPrint = rchEditor.Print(_checkPrint, rchEditor.TextLength, e); // Check for more pages e.HasMorePages = _checkPrint < rchEditor.TextLength; } private void _printDocument_BeginPrint(object sender, PrintEventArgs e) { _checkPrint = 0; } 

Answer 3

看来你的代码有问题，它只重新打印第一页因为

 StringReader reader = new StringReader(eintragRichTextBox.Text); 

在你的DocumentToPrint_PrintPage()

Answer 4

用那个！

 StringReader reader; int prov = 0; private void DocumentToPrint_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e) { if (prov == 0) { prov = 1; reader = new StringReader(eintragRichTextBox.Text); } float LinesPerPage = 0; float YPosition = 0; int Count = 0; float LeftMargin = e.MarginBounds.Left; float TopMargin = e.MarginBounds.Top; string Line = null; 

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