//红色线
public static void ViewPolylines(IMapControl4 pMapControl, List <CPolyline> cpllt)
{
//设置线段属性
ILineSymbol pSimpleLineSymbol = new SimpleLineSymbolClass();
pSimpleLineSymbol.Width = 1;
pSimpleLineSymbol.Color = CHelpFunc.GenerateIRgbColor(255, 0, 0) as IColor;
//生成线段
IElementCollection pEleCol = new ElementCollectionClass();
for (int i = 0; i < cpllt.Count; i++)
{
ILineElement pLineElement = new LineElementClass();
pLineElement.Symbol = pSimpleLineSymbol;
IElement pElement = pLineElement as IElement;
pElement.Geometry = cpllt[i].pPolyline;
pEleCol.Add(pElement, 0);
}
//显示线段
IGraphicsContainer pGra = pMapControl.Map as IGraphicsContainer;
IActiveView pAv = pGra as IActiveView;
pGra.AddElements(pEleCol, 5);
pAv.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
}
public static void AddPointElement(IGraphicsContainer pGraphicsContainer,
int intRed = 0, int intGreen = 0, int intBlue = 0)
{
IPoint ipt = new PointClass();
ipt.PutCoords(10, 10);
ISimpleMarkerSymbol pSimpleSym = new SimpleMarkerSymbolClass();
pSimpleSym.Style = esriSimpleMarkerStyle.esriSMSCross;
pSimpleSym.Size = 10;
pSimpleSym.Color = CHelpFunc.GenerateIRgbColor(intRed, intGreen, intBlue) as IColor;
IMarkerElement pMarkerElem = null;
IElement pElem;
pElem = new MarkerElementClass();
pElem.Geometry = ipt;
pMarkerElem = pElem as IMarkerElement;
pMarkerElem.Symbol = pSimpleSym;
pGraphicsContainer.AddElement(pElem, 0);
//pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
}
/// <summary>
///
/// </summary>
/// <param name="pActiveView"></param>
/// <param name="strText"></param>
/// <param name="dblX">the center of the text</param>
/// <param name="dblY">the bottom of characters like "5", "b", etc.; not the bottome of characters like "q"</param>
/// <param name="dblSize">the size of the characters, not the size of the text box</param>
/// <param name="intRed"></param>
/// <param name="intGreen"></param>
/// <param name="intBlue"></param>
/// <remarks>
/// https://resources.arcgis.com/en/help/arcobjects-net/componenthelp/index.html#//00480000021m000000
/// </remarks>
public static void DrawTextMarker(IActiveView pActiveView, string strText,
double dblX, double dblY, double dblSize = 10, int intRed = 0, int intGreen = 0, int intBlue = 0)
{
IElement element;
ITextElement textElement = new TextElementClass();
element = textElement as IElement;
ITextSymbol textSymbol = new TextSymbolClass();
textSymbol.Color = CHelpFunc.GenerateIRgbColor(intRed, intGreen, intBlue) as IColor;
textSymbol.Size = dblSize;
//textSymbol.Font = dblSize;
//textSymbol.HorizontalAlignment = GetHorizontalAlignment();
//textSymbol.VerticalAlignment = GetVerticalAlignment();
IPoint ipt = new PointClass();
ipt.PutCoords(dblX, dblY);
element.Geometry = ipt;
textElement.Symbol = textSymbol;
textElement.Text = strText;
//textElement.
pActiveView.GraphicsContainer.AddElement(element, 0);
pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
}
//红色线
public static void ViewPolyline(IMapControl4 pMapControl, CPolyline cpl)
{
//设置线段属性
ILineSymbol pSimpleLineSymbol = new SimpleLineSymbolClass();
pSimpleLineSymbol.Width = 2;
pSimpleLineSymbol.Color = CHelpFunc.GenerateIRgbColor(255, 0, 0) as IColor;
//生成线段
ILineElement pLineElement = new LineElementClass();
pLineElement.Symbol = pSimpleLineSymbol;
IElement pElement = pLineElement as IElement;
pElement.Geometry = cpl.pPolyline;
//显示线段
IGraphicsContainer pGra = pMapControl.Map as IGraphicsContainer;
IActiveView pAv = pGra as IActiveView;
pGra.AddElement(pElement, 0);
pAv.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null); //此语句必不可少，否则添加的要素不会实时显示
}
public static void DrawArrow(IActiveView pActiveView, CPoint frcpt, CPoint tocpt,
double dblArrowLength = 6, double dblArrowWidth = 6,
int intRed = 0, int intGreen = 0, int intBlue = 0)
{
var iColor = CHelpFunc.GenerateIRgbColor(intRed, intGreen, intBlue) as IColor;
//Define an arrow marker
IArrowMarkerSymbol arrowMarkerSymbol = new ArrowMarkerSymbolClass();
arrowMarkerSymbol.Color = iColor;
//arrowMarkerSymbol.Size = 6; //it seems size has no effect
arrowMarkerSymbol.Length = dblArrowLength;
arrowMarkerSymbol.Width = dblArrowWidth;
//Add an offset to make sure the square end of the line is hidden
//arrowMarkerSymbol.XOffset = 0.8;
//Create cartographic line symbol
ICartographicLineSymbol cartographicLineSymbol = new CartographicLineSymbolClass();
cartographicLineSymbol.Color = iColor;
cartographicLineSymbol.Width = 1;
//Define simple line decoration
ISimpleLineDecorationElement simpleLineDecorationElement = new SimpleLineDecorationElementClass();
//Place the arrow at the end of the line (the "To" point in the geometry below)
simpleLineDecorationElement.AddPosition(1);
simpleLineDecorationElement.MarkerSymbol = arrowMarkerSymbol;
//Define line decoration
ILineDecoration lineDecoration = new LineDecorationClass();
lineDecoration.AddElement(simpleLineDecorationElement);
//Set line properties
ILineProperties lineProperties = (ILineProperties)cartographicLineSymbol;
lineProperties.LineDecoration = lineDecoration;
//Define line element
ILineElement lineElement = new LineElementClass();
lineElement.Symbol = (ILineSymbol)cartographicLineSymbol;
var cpl = new CPolyline(-1, frcpt, tocpt);
//Cast to Element and set geometry
var element = (IElement)lineElement;
element.Geometry = cpl.JudgeAndSetPolyline();
//Set the name
//IElementProperties3 elementProperties3.Name = elementName;
//Add element to graphics container
pActiveView.GraphicsContainer.AddElement(element, 0);
pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
#region a useful example https://community.esri.com/thread/69395
////Set the element name
//string elementName = "ArrowTest";
////Get the graphics container from the page layout (set elsewhere)
//IActiveView activeView = (IActiveView)pageLayout;
//IGraphicsContainer graphicsContainer = (IGraphicsContainer)pageLayout;
////Find all existing elements with specified name
////Build a list of elements and then loop over the list to delete them
//List<IElement> elementsToDelete = new List<IElement>();
//graphicsContainer.Reset();
//IElementProperties3 elementProperties3 = null;
//IElement element = null;
//while ((element = graphicsContainer.Next()) != null)
//{
// elementProperties3 = (IElementProperties3)element;
// if (elementProperties3.Name == elementName)
// {
// elementsToDelete.Add(element);
// }
//}
//foreach (IElement elementToDelete in elementsToDelete)
//{
// graphicsContainer.DeleteElement(elementToDelete);
//}
////Define color
//IRgbColor rgbColor = new RgbColorClass();
//rgbColor.RGB = Color.Black.ToArgb();
////Define an arrow marker
//IArrowMarkerSymbol arrowMarkerSymbol = new ArrowMarkerSymbolClass();
//arrowMarkerSymbol.Color = rgbColor;
//arrowMarkerSymbol.Size = 6;
//arrowMarkerSymbol.Length = 8;
//arrowMarkerSymbol.Width = 6;
////Add an offset to make sure the square end of the line is hidden
//arrowMarkerSymbol.XOffset = 0.8;
////Create cartographic line symbol
//ICartographicLineSymbol cartographicLineSymbol = new CartographicLineSymbolClass();
//cartographicLineSymbol.Color = rgbColor;
//cartographicLineSymbol.Width = 1;
////Define simple line decoration
//ISimpleLineDecorationElement simpleLineDecorationElement = new SimpleLineDecorationElementClass();
////Place the arrow at the end of the line (the "To" point in the geometry below)
//simpleLineDecorationElement.AddPosition(1);
//simpleLineDecorationElement.MarkerSymbol = arrowMarkerSymbol;
////Define line decoration
//ILineDecoration lineDecoration = new LineDecorationClass();
//lineDecoration.AddElement(simpleLineDecorationElement);
////Set line properties
//ILineProperties lineProperties = (ILineProperties)cartographicLineSymbol;
//lineProperties.LineDecoration = lineDecoration;
////Define line element
//ILineElement lineElement = new LineElementClass();
//lineElement.Symbol = (ILineSymbol)cartographicLineSymbol;
////Create the line geometry
//IPoint fromPoint = new PointClass();
//fromPoint.X = 4.0;
//fromPoint.Y = 0.8;
//IPoint toPoint = new PointClass();
//toPoint.X = 5.0;
//toPoint.Y = 0.8;
//IPolyline polyline = new PolylineClass();
//polyline.FromPoint = fromPoint;
//polyline.ToPoint = toPoint;
////Cast to Element and set geometry
//element = (IElement)lineElement;
//element.Geometry = polyline;
////Set the name
//elementProperties3.Name = elementName;
////Add element to graphics container
//graphicsContainer.AddElement(element, 0);
////Clear the graphics selection (graphics are selected when added)
//IGraphicsContainerSelect graphicsContainerSelect = (IGraphicsContainerSelect)graphicsContainer;
//graphicsContainerSelect.UnselectAllElements();
//activeView.Refresh();
#endregion
}
public void RenderLayer(ref IFeatureLayer fLayer, esriGeometryType fesriGeometryType,
int intRed, int intGreen, int intBlue, double fdblWidth, int intOutlineRed, int intOutlineGreen, int intOutlineBlue,
esriSimpleLineStyle pesriSimpleLineStyle, esriSimpleFillStyle pesriSimpleFillStyle, string strSymbolLayerPath)
{
if (strSymbolLayerPath == null)
{
IRgbColor pRgbColor = CHelpFunc.GenerateIRgbColor(intRed, intGreen, intBlue);
ISimpleRenderer pSimpleRenderer = new SimpleRendererClass();
switch (fesriGeometryType)
{
case esriGeometryType.esriGeometryPoint:
ISimpleMarkerSymbol pSimpleMarkerSymbol = new SimpleMarkerSymbolClass();
pSimpleMarkerSymbol.Color = pRgbColor as IColor;
pSimpleMarkerSymbol.Size = fdblWidth;
pSimpleRenderer.Symbol = pSimpleMarkerSymbol as ISymbol;
break;
case esriGeometryType.esriGeometryPolyline:
pSimpleRenderer.Symbol = GetSimpleLineSymbol(pRgbColor, fdblWidth, pesriSimpleLineStyle) as ISymbol;
break;
case esriGeometryType.esriGeometryPolygon:
IRgbColor pRgbColorOutline = new RgbColorClass();
pRgbColorOutline.Red = intOutlineRed;
pRgbColorOutline.Green = intOutlineGreen;
pRgbColorOutline.Blue = intOutlineBlue;
ISimpleFillSymbol pSimpleFillSymbol = new SimpleFillSymbolClass();
pSimpleFillSymbol.Outline = GetSimpleLineSymbol(pRgbColorOutline, fdblWidth, pesriSimpleLineStyle);
pSimpleFillSymbol.Color = pRgbColor as IColor;
pSimpleFillSymbol.Style = pesriSimpleFillStyle;
pSimpleRenderer.Symbol = pSimpleFillSymbol as ISymbol;
break;
default:
return;
}
//fLayer.
IGeoFeatureLayer pGeoFeaturelayer = fLayer as IGeoFeatureLayer;
pGeoFeaturelayer.Renderer = pSimpleRenderer as IFeatureRenderer;
}
else
{
//In the shapefile properties, under the Symbology tab,
//you have the Import button which allow you to import the symbology definition from another shapefile or layer file.
//The code below is doing exactly the same.
//You need to create a layer file with the desired symbology definition and then call this sub.
IGxLayer pGxLayer;
IGxFile pGxFile;
ILayer pSymLayer;
IGeoFeatureLayer pLyr;
IGeoFeatureLayer pGeoSymLyr;
pGxLayer = new GxLayer();
pGxFile = pGxLayer as IGxFile;
pGxFile.Path = strSymbolLayerPath;
pSymLayer = pGxLayer.Layer;
pLyr = fLayer as IGeoFeatureLayer;
pGeoSymLyr = pSymLayer as IGeoFeatureLayer;
pLyr.Renderer = pGeoSymLyr.Renderer;
}
}
