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有人可以帮我将以下内容翻译成 C# 等价物。mapPicture 是 GDI 代码中的图片对象，但它是 C# 中的面板。我已经完成了如下代码，

原始 MFC 代码，

CDC *dc = mapPicture.GetDC();
CRect maprect;
mapPicture.GetClientRect(&maprect); 
CPen pen,*oldpen;
dc->Rectangle(&rect);
pen.CreatePen(PS_SOLID,1,RGB(0,0,0));
oldpen=dc->SelectObject(&pen);
dc->SetMapMode(MM_LOMETRIC);
CPoint b1=dc->SetViewportOrg(25,rect.Height()-25);
dc->SetTextColor(RGB(0,0,0));
dc->MoveTo(0,0);
dc->LineTo((2*rect.right - 60),0);
dc->MoveTo(0,0);
dc->LineTo(0,2*rect.bottom);
dc->MoveTo((2*rect.right - 60)-15,8);
dc->LineTo((2*rect.right - 60),0);
dc->LineTo((2*rect.right - 60)-15,-8);
dc->SetTextAlign(TA_RIGHT|TA_BOTTOM);
dc->TextOut((2*rect.right - 55),-55,"X");

到目前为止我已经完成的 C# 代码，

myPen = new Pen(Color.Black, 1);
formGraphics = mapPicture.CreateGraphics();
Rectangle rect = mapPicture.ClientRectangle;
formGraphics.PageUnit = GraphicsUnit.Millimeter;
formGraphics.TranslateTransform(25, rect.Height - 25);
formGraphics.DrawLine(myPen, 0, 0, (2 * rect.Right - 60), 0);
formGraphics.DrawLine(myPen, 0, 0, 0, 2 * rect.Bottom);
formGraphics.DrawLine(myPen, (2 * rect.Right - 60) - 15, 8, (2 * rect.Right - 60), 0);
formGraphics.DrawLine(myPen, (2 * rect.Right - 60), 0, (2 * rect.Right - 60) - 15, -8);
SolidBrush drawBrush = new SolidBrush(Color.Black);
Font drawFont = new Font("Microsoft Sans Serif", 9);
formGraphics.DrawString("X", drawFont, drawBrush, (2 * rect.Right - 55), -55);
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1 回答 1

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Without setting the Map mode, you might well encounter issues with co-ordinates. It was in the original code for a reason. I don't believe there is a direct C# equivalent so you'll need to look at using PInvoke to call the Win32 SetMapMode function directly.

(copied from http://www.pinvoke.net/default.aspx/gdi32/SetMapMode.html )

C# Signature

[DllImport("gdi32.dll")]
static extern int SetMapMode(IntPtr hdc, int fnMapMode);

Constants

//Mapping Modes
static int MM_TEXT = 1;
static int MM_LOMETRIC = 2;
static int MM_HIMETRIC = 3;
static int MM_LOENGLISH = 4;
static int MM_HIENGLISH = 5;
static int MM_TWIPS = 6;
static int MM_ISOTROPIC = 7;
static int MM_ANISOTROPIC = 8;

//Minimum and Maximum Mapping Mode values
static int MM_MIN = MM_TEXT;
static int MM_MAX = MM_ANISOTROPIC;
static int MM_MAX_FIXEDSCALE = MM_TWIPS;
于 2011-10-31T13:24:59.717 回答