topic Re: Label Polygon corner /vertices coordinate as graphic in ArcObjects SDK Questions

Label Polygon corner /vertices coordinate as graphic

NajdALHanahnah — Sat, 30 Aug 2014 18:35:58 GMT

Dear All

I am working now on ArcObject .Net to develop an gis application , i need your help in certain area , i can now get Polygon corner (vertices ) but how i can show the corner /vertices as graphic with it's label .

Thanks

Re: Label Polygon corner /vertices coordinate as graphic

NajdALHanahnah — Sun, 31 Aug 2014 18:23:57 GMT

any help or advice Plz.

Re: Label Polygon corner /vertices coordinate as graphic

NajdALHanahnah — Sun, 21 Sep 2014 10:31:06 GMT

This what i meant :

Re: Label Polygon corner /vertices coordinate as graphic

RiyasDeen — Mon, 22 Sep 2014 02:46:52 GMT

Hi Najad,

Have look at AddTextElement method in this sample ArcObjects 10 .NET SDK Help .

Iterate through your polygon vertices by casting it as IPointCollection to get vertex geometry.

Re: Label Polygon corner /vertices coordinate as graphic

RavishankarJayaraman — Tue, 23 Sep 2014 02:58:41 GMT

Here is a small piece of code that does what you need. The code should work as it is pretty simple and I have not tested even for compilation. But this should get you started with ArcObjects.

//Get the Polygon from the Feature.Shape property

public void AddPolygonVertexText(IMap map, IPolygon polygon)

{

IPointCollection ptCollection = (IPointCollection)polygon;

IPoint outPoint=new PointClass();

IGraphicsContainer graphicsContainer = map as IGraphicsContainer;

IElement txtElement=null;

for(int ptCount=0;ptCount<ptCollection.PointCount;ptCount++)

{

ptCollection.QueryPoint(ptCount,outPoint);

GetTextElement(outPoint,ptCount+1);

graphicsContainer.AddElement(element, 0);

}

((IActiveView)map).PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);

}

//Creates a TextElement and sends the result to the calling class

private ITextElement AddTextElement(IPoint pt,string labelTxt)

{

IElement element = new TextElementClass();

ITextElement textElement = element as ITextElement;

IPoint point = new PointClass();

point.X = pt.X;

point.Y = pt.Y;

element.Geometry = point;

textElement.Text = labelText;

return textElement;

}