Using EAGL to export feature classes to .net data table

In this example we will see how to use EAGL library to export feature classes to the .net's DataTable type.

In this example we will suppose we have a windows application that contains a map control called 'ctMap', a list box called 'lstLayers' and another windows form that contains a DataGrid with public access modifier called dg, we will use this data grid to show the generated data table.


This function will load an Mxd file to the map control:

private void loadMXD(string mxdPath)

{

IMapDocument doc = new MapDocumentClass();

doc.Open(mxdPath, "");

IMap map = doc.get_Map(0);

ctMap.Map = map;

// we can't use foreach directlty with map

MapExplorer mex = new MapExplorer(map);

lstLayers.Items.Clear();

foreach (ILayer lyr in mex.Layers)

{

lstLayers.Items.Add(lyr.Name);

}

}

This function will generate the data table from the layer and shows it in a form:

private void openAttributeTable(int layerIndex)

{

ILayer lyr = ctMap.get_Layer(layerIndex);

IFeatureLayer flyr = lyr as IFeatureLayer;

if (flyr != null)

{

// create a new DataTableBuilder instance

DataTableBuilder tableBuilder = new DataTableBuilder(flyr.FeatureClass);

// get the generated datatable

DataTable dtable = tableBuilder.DataTable;

// create a feature cursor with recycling enabled

IFeatureCursor crsr = flyr.Search(null, true);

// create a new DataTableAdapter Instance

DataTableAdapter tableAdapter = new DataTableAdapter(crsr);

// now fill the datatable

tableAdapter.Fill(dtable);

FrmAttribTable f = new FrmAttribTable();

f.dg.DataSource = dtable;

f.Show();

}

}

As you can see it is really easy to generate a DataTable out of any FeatureCursor instance using EAGL.

Happy Coding...

EAGL Project Site