Selected Features

Question

Hi,

I want to create buffer only for selected features which are selected from "select feature tool".
How to do it using c#.net?

Thanks and Regards,
Arun

ArunYegi · Answer

Hi,

I have created a buffer as follows

IMap map = axMapControl1.ActiveView.FocusMap;
            IFeatureSelection fSelection = map.get_Layer(0) as IFeatureSelection;
            
            ISelectionSet selSet = fSelection.SelectionSet;
            
            
            ICursor cursor;
            selSet.Search(null, true, out cursor);

IFeature feat = ((IFeatureCursor)cursor).NextFeature();
            ITopologicalOperator topoOpr = feat.Shape as ITopologicalOperator;

IPolygon buffPolygon = topoOpr.Buffer(100) as IPolygon;

IActiveView activeView=axMapControl1.ActiveView;
            IScreenDisplay screendispaly = activeView.ScreenDisplay;
            screendispaly.StartDrawing(screendispaly.hDC, (System.Int32)esriScreenCache.esriAllScreenCaches);

ISimpleFillSymbol simFillSymbol = new SimpleFillSymbolClass() ;
            simFillSymbol.Style = esriSimpleFillStyle.esriSFSSolid;
            IRgbColor color = new RgbColorClass();
            color.Red = 255;
            simFillSymbol.Color = color;

ISymbol symbol = simFillSymbol as ISymbol;
            screendispaly.SetSymbol(symbol);

screendispaly.DrawPolygon(buffPolygon);

Now i can see a buffer around a feature.
I want to save it as a Feature class into data base.
How can i do it? Please help me out..

Thanks

MarcinDruzgala · Answer

http://help.arcgis.com/en/sdk/10.0/arcobjects_net/conceptualhelp/index.html#//00010000041n000000

The first example:
public void IFeatureClassAsInput(IFeatureClass pFC, string buff_dist)
{
    IGeoProcessor2 gp = new GeoProcessorClass();
    gp.OverwriteOutput = true;
    IVariantArray parameters = new VarArrayClass();
    parameters.Add(pFC);
    parameters.Add(@C:	emp\poitns_buff.shp);
    parameters.Add(buff_dist);
    gp.Execute("Buffer_analysis", parameters, null);
}

And this: http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//000800000019000000

Cheers,
MDruzgala

ArunYegi · Answer

Thanks for your help. That worked fine.
I have one more question.
What is the difference between creating buffer like this and creating by Execute method?

if i want to create buffer and display it on map using Execute method,how can i do it?

Thanks and Regards,
Arun