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C#打印（RichTextBox）

c# printing

C#打印（RichTextBox）,c#,printing,C#,Printing,我想打印RichTextBox（eintragRichTextBox）的内容 我现在有以下代码： private void druckenPictureBox_Click(object sender, EventArgs e) { PrintDialog printDialog = new PrintDialog(); PrintDocument documentToPrint = new PrintDocument(); printDialog.Document = d

我想打印RichTextBox（eintragRichTextBox）的内容 我现在有以下代码：

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();
}

private void druckenPictureBox\u单击（对象发送方，事件参数e）
{
PrintDialog PrintDialog=新建PrintDialog（）；
PrintDocument DocumentTopPrint=新的PrintDocument（）；
printDialog.Document=DocumentTopPrint；
if（printDialog.ShowDialog（）==DialogResult.OK）
{
StringReader=新的StringReader（eintragRichTextBox.Text）；
documentToPrint.Print（）；
DocumentTopPrint.PrintPage+=新的PrintPageEventHandler（DocumentTopPrint\u PrintPage）；
}
}
私有void DocumentToPrint_PrintPage（对象发送者，System.Drawing.Printing.PrintPageEventArgs e）
{
StringReader=新的StringReader（eintragRichTextBox.Text）；
float LinesPerPage=0；
浮动位置=0；
整数计数=0；
浮动左边距=e.MarginBounds.Left；
浮动顶部边距=e.MarginBounds.Top；
字符串行=null；
Font PrintFont=this.eintragRichTextBox.Font；
SolidBrush PrintBrush=新的SolidBrush（颜色为黑色）；
LinesPerPage=e.MarginBounds.Height/PrintFont.GetHeight（e.Graphics）；
而（Count
但它总是给我一个空白的网站：（…有人有想法，为什么它不起作用？ 或者有没有更好的代码/想法来实现打印

编辑： 看答案，明白了

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();    
}
现在它很好用

另外，如果有人需要打印RichTextBox的内容，您可以使用我的代码。

您的代码似乎有问题，它只会因为

StringReader reader = new StringReader(eintragRichTextBox.Text);
在您的
文档toprint\u PrintPage（）中使用它


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;


我试过了，效果很好

您只需创建一个自定义的
RichTextBox
，然后它就可以快速打印整个文本，并保持纸张上的样式

用于创建自定义RichTextBox的代码


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();
        }

    }
}


主要的源代码包括
PrintDialog、PrintPreviewDialog、PrintDocument和PageSetupDialog
，但是只需一个
PrintDocument
控件就可以了。因此我删除了一些额外的代码，只是为了缩短有用的部分。但是如果您有兴趣全部使用它们，可以在链接页面中找到完整的代码


    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;
    }



private PrintDocument\u PrintDocument=new PrintDocument（）；
私人内部检查打印；
公共表格1（）
{
初始化组件（）；
_printDocument.BeginPrint+=\u printDocument\u BeginPrint；
_printDocument.PrintPage+=\u printDocument\u PrintPage；
}
私有void btnPrint\u单击（对象发送方，事件参数e）
{
PrintDialog PrintDialog=新建PrintDialog（）；
if（printDialog.ShowDialog（）==DialogResult.OK）
_printDocument.Print（）；
}
私有void\u printDocument\u PrintPage（对象发送者，PrintPageEventArgs e）
{
//打印RichTextBox的内容。存储打印的最后一个字符。
_checkPrint=rchEditor.Print（_checkPrint，rchEditor.TextLength，e）；
//查看更多页面
e、 HasMorePages=_checkPrint
为什么要在documentToPrint.Print（）之前创建“StringReader阅读器…”？我想你不需要它。Aso，调试时会发生什么？我还没有发现你的问题，但有一件事是，如果你的RTB有足够的文本填充多个页面，你会发现它打印了无限多的页面。你需要声明你的读卡器、计数和行值超出了你的PrintPage e范围发泄…你还需要做一些调试，添加一些断点，看看什么值被设置为预期值，哪些是无效的。也许代码可以工作，但可能是，我没有足够的墨水。我会尽快检查。没有，有足够的墨水，我可以用文本打印word文档。我的RTB没有很多文本，有时只有一个短语s、 。调试不起作用，不知道为什么。。这不会以样式打印文档，而且打印长文本需要很长时间！我4年前编写了此代码，当时的目标不是以样式打印。无论如何，感谢您在回答中提供了新的变体。无法使用set-printerDocument.DefaultPageSettings.PaperSize和use这个方法。这就是我的问题所在。