private Bitmap DrawToPictureBox(ISymbol pSym, PictureBox pBox)
{
IGeometry pGeometry = null;
System.Drawing.Graphics pGraphics = null;
pGraphics = System.Drawing.Graphics.FromHwnd(pBox.Handle);
pGraphics.FillRectangle(System.Drawing.Brushes.White, pBox.ClientRectangle);
Bitmap image = new Bitmap(pBox.Width, pBox.Height, pGraphics);
IEnvelope pEnvelope = new EnvelopeClass();
if (pSym is IMarkerSymbol)
{
IPoint pPoint = new PointClass(); //the geometry of a MarkerSymbol
pPoint.PutCoords(pBox.Width / 2, pBox.Height / 2); //center in middle of pBox
pGeometry = pPoint;
}
if (pSym is ILineSymbol)
{
pEnvelope.PutCoords(0, pBox.Height / 2, pBox.Width, pBox.Height / 2);
IPolyline pPolyline = new PolylineClass();
pPolyline.FromPoint = pEnvelope.LowerLeft;
pPolyline.ToPoint = pEnvelope.UpperRight;
pGeometry = pPolyline;
}
if (pSym is IFillSymbol)
{
pEnvelope.PutCoords(1, 1, pBox.Width - 1, pBox.Height - 1);
pGeometry = pEnvelope;
if (pSym is IMultiLayerFillSymbol)
{
IMultiLayerFillSymbol pMultiLayerFillSymbol = pSym as IMultiLayerFillSymbol;
//For mLayers As Integer = 0 To pMultiLayerFillSymbol.LayerCount - 1
for (int i = 0; i < pMultiLayerFillSymbol.LayerCount; i++)
{
if (pMultiLayerFillSymbol.get_Layer(i) is IPictureFillSymbol)
{
IPictureFillSymbol pPictureFillSymbol = pMultiLayerFillSymbol.get_Layer(0) as IPictureFillSymbol;
image = Bitmap.FromHbitmap(new IntPtr(pPictureFillSymbol.Picture.Handle));
//m.MakeTransparent(System.Drawing.ColorTranslator.FromOle(pPictureFillSymbol.Color.RGB))
return(image);
}
else if (pMultiLayerFillSymbol.get_Layer(i) is ISimpleFillSymbol)
{
pEnvelope.PutCoords(1, 1, pBox.Width - 1, pBox.Height - 1);
pGeometry = pEnvelope;
}
else if (pMultiLayerFillSymbol.get_Layer(i) is IGradientFillSymbol)
{
IGradientFillSymbol pGradientFillSymbol = pMultiLayerFillSymbol.get_Layer(0) as IGradientFillSymbol;
IAlgorithmicColorRamp pRamp = pGradientFillSymbol.ColorRamp as IAlgorithmicColorRamp;
System.Drawing.Rectangle rect = new System.Drawing.Rectangle(new System.Drawing.Point(0, 0), new System.Drawing.Size(pBox.Width, pBox.Height));
LinearGradientBrush lgBrush = new LinearGradientBrush(rect,
System.Drawing.ColorTranslator.FromOle(pRamp.FromColor.RGB),
System.Drawing.ColorTranslator.FromOle(pRamp.ToColor.RGB),
45);
pGraphics.FillRectangle(lgBrush, rect);
rect.Width = rect.Width - 1;
rect.Height = rect.Height - 1;
pGraphics.DrawRectangle(new Pen(ColorTranslator.FromOle(pGradientFillSymbol.Outline.Color.RGB),
(float)pGradientFillSymbol.Outline.Width), rect);
image = new Bitmap(pBox.Width, pBox.Height, pGraphics);
}
}
}
else if (pSym is IPictureFillSymbol)
{
IPictureFillSymbol pPictureFillSymbol = pSym as IPictureFillSymbol;
image = Bitmap.FromHbitmap(new IntPtr(pPictureFillSymbol.Picture.Handle));
//m.MakeTransparent(System.Drawing.ColorTranslator.FromOle(pPictureFillSymbol.Color.RGB))
return(image);
}
}
IntPtr hDC = GetDC(pBox.Handle);
pSym.SetupDC(hDC.ToInt32(), null);
pSym.ROP2 = esriRasterOpCode.esriROPCopyPen;
if (pGeometry != null)
{
pSym.Draw(pGeometry);
}
pSym.ResetDC();
Graphics g2 = Graphics.FromImage(image);
//获得屏幕的句柄
IntPtr dc3 = pGraphics.GetHdc();
//获得位图的句柄
IntPtr dc2 = g2.GetHdc();
BitBlt(dc2, 0, 0, pBox.Width, pBox.Height, dc3, 0, 0, SRCCOPY);
pGraphics.ReleaseHdc(dc3); //释放屏幕句柄
g2.ReleaseHdc(dc2); //释放位图句柄
//image.Save("c:\\MyJpeg.Icon", ImageFormat.Bmp);
return(image);
}
private void DrawToPictureBox(ISymbol pSym, PictureBox pBox)
{
IGeometry pGeometry = null;
IntPtr hDC;
IEnvelope pEnvelope;
pEnvelope = new EnvelopeClass();
// Reset the PictureBox
pBox.CreateGraphics().Clear(pBox.BackColor);
try
{
if (pSym is IMarkerSymbol)
{
pEnvelope.PutCoords(pBox.Width / 2, pBox.Height / 2, pBox.Width / 2, pBox.Height / 2);
IArea pArea = pEnvelope as IArea;
pGeometry = pArea.Centroid;
}
else if (pSym is ILineSymbol)
{
pEnvelope.PutCoords(0, pBox.Height / 2, pBox.Width, pBox.Height / 2);
IPolyline pPolyline = new PolylineClass();
pPolyline.FromPoint = pEnvelope.LowerLeft;
pPolyline.ToPoint = pEnvelope.UpperRight;
pGeometry = pPolyline;
}
else if (pSym is IFillSymbol)
{
if (pSym is SimpleFillSymbol)
{
pEnvelope.PutCoords(5, 5, pBox.Width - 5, pBox.Height - 5);
pGeometry = pEnvelope;
}
else if (pSym is MultiLayerFillSymbol)
{
IMultiLayerFillSymbol pMultiLayerFillSymbol = pSym as IMultiLayerFillSymbol;
//For mLayers As Integer = 0 To pMultiLayerFillSymbol.LayerCount - 1
if (pMultiLayerFillSymbol.get_Layer(0) is PictureFillSymbol)
{
IPictureFillSymbol pPictureFillSymbol = pMultiLayerFillSymbol.get_Layer(0) as IPictureFillSymbol;
Bitmap m = Bitmap.FromHbitmap(new IntPtr(pPictureFillSymbol.Picture.Handle));
//m.MakeTransparent(System.Drawing.ColorTranslator.FromOle(pPictureFillSymbol.Color.RGB))
pBox.Image = m;
return;
}
else if (pMultiLayerFillSymbol.get_Layer(0) is SimpleFillSymbol)
{
pEnvelope.PutCoords(5, 5, pBox.Width - 5, pBox.Height - 5);
pGeometry = pEnvelope;
}
else if (pMultiLayerFillSymbol.get_Layer(0) is GradientFillSymbol)
{
IGradientFillSymbol pGradientFillSymbol = pMultiLayerFillSymbol.get_Layer(0) as IGradientFillSymbol;
IAlgorithmicColorRamp pRamp = pGradientFillSymbol.ColorRamp as IAlgorithmicColorRamp;
System.Drawing.Rectangle rect = new System.Drawing.Rectangle(new System.Drawing.Point(0, 0), new System.Drawing.Size(pBox.Width, pBox.Height));
LinearGradientBrush lgBrush = new LinearGradientBrush(rect,
System.Drawing.ColorTranslator.FromOle(pRamp.FromColor.RGB),
System.Drawing.ColorTranslator.FromOle(pRamp.ToColor.RGB),
45);
Graphics g = pBox.CreateGraphics();
g.FillRectangle(lgBrush, rect);
rect.Width = rect.Width - 1;
rect.Height = rect.Height - 1;
g.DrawRectangle(new Pen(ColorTranslator.FromOle(pGradientFillSymbol.Outline.Color.RGB),
(float)pGradientFillSymbol.Outline.Width), rect);
}
}
else if (pSym is PictureFillSymbol)
{
IPictureFillSymbol pPictureFillSymbol = pSym as IPictureFillSymbol;
Bitmap m = Bitmap.FromHbitmap(new IntPtr(pPictureFillSymbol.Picture.Handle));
//m.MakeTransparent(System.Drawing.ColorTranslator.FromOle(pPictureFillSymbol.Color.RGB))
pBox.Image = m;
return;
}
}
hDC = GetDC(pBox.Handle);
pSym.SetupDC(hDC.ToInt32(), null);
pSym.ROP2 = esriRasterOpCode.esriROPCopyPen;
if (pGeometry != null)
{
pSym.Draw(pGeometry);
}
pSym.ResetDC();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}