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IGeometryBridge.QueryPoints Method (ArcObjects .NET 10.8 SDK)
ArcObjects Help for .NET developers > ArcObjects Help for .NET developers > ArcObjects namespaces > Geometry > ESRI.ArcGIS.Geometry > Interfaces > IG > IGeometryBridge Interface > IGeometryBridge.QueryPoints Method
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IGeometryBridge.QueryPoints Method

Copies some points to an existing array of points.

[Visual Basic .NET]
Public Sub QueryPoints ( _
    ByVal pPointCollection As IPointCollection4, _
    ByVal Index As Integer, _
    ByRef Points As IPoint[] _
public void QueryPoints (
    IPointCollection4 pPointCollection,
    int Index,
    ref IPoint[] Points
HRESULT QueryPoints(
  IPointCollection4* pPointCollection,
  long Index,
  SAFEARRAY(IPoint)** Points
pPointCollection [in]

pPointCollection is a parameter of type IPointCollection4* Index
Index is a parameter of type long Points [in, out]
Points is a parameter of type SAFEARRAY(IPoint*)*

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.


All development languages compatible version of IPointCollection::QueryPoints.

When calling this method no count parameter is needed. The length of the array parameter will be used in place of the explicit number given in the IPointCollection::QueryPoints call.  This also requires that the array parameter given to IGeometryBridge::QueryPoints can not be longer than the length of the PointCollection minus the index parameter.


    public void QueryPoints()
        //prepare inputPoints
        IPoint point1 = new PointClass();
        point1.PutCoords(10, 10);
        IPoint point2 = new PointClass();
        point2.PutCoords(20, 20);
        IPoint[] inputPointArray = new IPoint[2];
        inputPointArray[0] = point1;
        inputPointArray[1] = point2;
        IPointCollection4 pointCollection = new MultipointClass();

        //add points to pointCollection
        IGeometryBridge geometryBridge = new GeometryEnvironmentClass();
        geometryBridge.AddPoints(pointCollection, ref inputPointArray);
        //query Points
        int index = 0;
        IPoint[] outputPointArray = new IPoint[inputPointArray.Length - index];
        for (int i = 0; i < outputPointArray.Length; i++)
            outputPointArray[i] = new PointClass();

        geometryBridge.QueryPoints(pointCollection, index, ref outputPointArray);
        for (int i = 0; i < outputPointArray.Length; i++)
            IPoint currentPoint = outputPointArray[i];
            if (currentPoint == null)
                System.Windows.Forms.MessageBox.Show("Current point = null");
                System.Windows.Forms.MessageBox.Show("X = " + currentPoint.X + ", Y = " + currentPoint.Y);

See Also

IGeometryBridge Interface