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
我试过如何打印RichTextBox控件的内容,它就像一个魅力.
你只需要创建一个自定义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!
创建自定义的代码 RichTextBox
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,但它只使用一个PrintDocument控件工作正常.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;
}
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..