Question

我尝试打印RichTextBox的内容，如果我打印到打印机，则会有太多错误。但是，当我打印到XPS文件（通过Windows中的XPS打印机），然后将此文件打印到打印机时，一切正常。

我可以通过编程方式完成所有这些事情吗？

这是我的打印方法：

 public int PrintRotate(bool rotate, PrintPageEventArgs e, int charFrom, int charTo)
    {
        //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


        SetGraphicsMode(fmtRange.hdc, GM_ADVANCED);

        XFORM par = new XFORM();

        par = new XFORM();
        par.eM11 = 1;
        par.eM12 = 0;
        par.eM21 = 0;
        par.eM22 = 1;
        par.eDx = -e.PageSettings.Margins.Left / 100 * e.PageSettings.PrinterResolution.X;
        par.eDy = -e.PageSettings.Margins.Top / 100 * e.PageSettings.PrinterResolution.Y;
        ModifyWorldTransform(fmtRange.hdc, ref par, MWT_LEFTMULTIPLY);

        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();
    }

Answer 1

我遇到了这样的问题，最后制作了一个.XPS文件，然后将其发送到打印机。

从您的问题来看，听起来您已经拥有＆＃34;打印＆＃34;到xps文件，这很好，因为我不知道有关将富文本框打印到xps文件的过程。在我的场景中，我需要在不使用ms office的情况下打印文件，所以我最终制作了一个XPS文件，在代码中编辑它，然后将其发送到打印机。

这是我用来将xps文件直接发送到打印机的代码：

LocalPrintServer localPrintServer = new LocalPrintServer();
var queue = localPrintServer.GetPrintQueue("NameOfPrinter");
PrintSystemJobInfo xpsPrintJob = queue.AddJob("name of print job", "my/xps/path.xps",false);

还要记住，要使此代码生效，您需要添加对System.Printing和＆＃34; ReachFramework＆＃34;的引用。花了我更长的时间来记住找出我无法访问printjob的原因。

根据我的经验，大多数打印机应该支持这一点。常见的，它甚至适用于奇数条码打印机＆＃34;在我们的存储部门。

打印到XPS文件，然后将其打印到打印机

1 个答案: