I've been trying to follow the example for using the IFeatureClassLoad interface for loading data from a file, and I keep getting a Cast Exception saying that the interface isn't supported. Any ideas?
protected override void OnClick()
{
try
{
string filename = "C:\\Temp\\MyDataFile";
ESRI.ArcGIS.esriSystem.IPropertySet propertySet = new ESRI.ArcGIS.esriSystem.PropertySetClass();
propertySet.SetProperty("DATABASE", filename);
myApplication = Hook as IApplication;
IWorkspaceFactory2 factory = new ESRI.ArcGIS.DataSourcesFile.ShapefileWorkspaceFactoryClass();
IWorkspace2 workspace = factory.OpenFromFile(filename, 0) as IWorkspace2;
IFeatureClass myFeature = CreateFeatureClass(workspace, null, "MyDataFile", null, null, null, "");
if(myFeature != null) {
//Create an IFeatureLayer
IFeatureLayer featureLayer = new FeatureLayerClass();
CreateDummyPoint(myFeature);
featureLayer.FeatureClass = myFeature;
ILayer layer = (ILayer)featureLayer;
layer.Name = featureLayer.FeatureClass.AliasName;
IMxDocument mxDocument = (IMxDocument)myApplication.Document;
IMap map = mxDocument.FocusMap;
map.AddLayer(layer);
}
}
catch (NullReferenceException nre) {
Console.WriteLine("error", nre);
} catch (Exception e) {
Console.WriteLine("Uh Oh", e);
} finally {
Console.WriteLine("Done");
}
}
private void CreateDummyPoint(IFeatureClass featureClass) {
string anotherFile = "c:\\Temp\\SampleTextData.txt";
int[] fields = new int[2];
fields[0] = 20;
fields[1] = 20;
IFeatureClassLoad featureClassLoad = (IFeatureClassLoad)featureClass; -- HERE'S WHERE IT FAILS!!!
TextFieldParser parser = new TextFieldParser(anotherFile);
parser.TextFieldType = Microsoft.VisualBasic.FileIO.FieldType.FixedWidth;
parser.SetFieldWidths(fields);
while(!parser.EndOfData) {
string[] strFields = parser.ReadFields();
IFeature feature = featureClass.CreateFeature();
IPoint point = new PointClass();
point.X = Convert.ToDouble(strFields[0]);
point.Y = Convert.ToDouble(strFields[1]);
feature.Shape = point;
feature.Store();
}
}
