良い一日!
RichTextBoxから短いカードを印刷する必要があります。カードのサイズは10x14cmです。
お客様のプリンタ機能により、カードをプリンタに挿入できるのは次の方法のみです。
PageSettingsを2つの方法で設定しようとしました。
- PageSettings.Width = 10; PageSettings.Height=14。
- PageSettings.Width = 14; PageSettings.Height=10。
そして、印刷可能な領域は次のようになります。
印刷がリリースされる方法のコードは次のとおりです。
btnRotate.CheckedChanged += (s, e) => InitPaperSize();
private void InitPaperSize()
{
string name = btnRotate.Checked ? "ShortCard (rotate)" : "ShortCard";
int width = Centimeters(btnRotate.Checked ? 14 : 10);
int height = Centimeters(btnRotate.Checked ? 10 : 14);
System.Drawing.Printing.PaperSize ps = new System.Drawing.Printing.PaperSize(name, width, height);
printDocument.DefaultPageSettings.PaperSize = ps;
}
private int Centimeters(int centimeters)
{
return (int)((centimeters * 100) / 2.54);
}
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;//делим на 100 так как границы указываются в сотых долях дюйма
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();
}
唯一の問題は、カードをプリンタに水平にしか入れられないことです。