//IFeatureWorkspace OpenFeatureClass Example

//This example opens a shapefile as a feature class。

//e.g., nameOfShapefile = "States";

// dataPath = "D:\\Data\\Esridata\\USA"

public void IFeatureWorkspace_OpenFeatureClass_Example(string dataPath, string nameOfShapefile)

{

　　 IWorkspaceFactory workspaceFactory = new ESRI.ArcGIS.DataSourcesFile.ShapefileWorkspaceFactoryClass();

　　IFeatureWorkspace featureWorkspace = (IFeatureWorkspace)workspaceFactory.OpenFromFile(dataPath, 0);

　　 IFeatureClass featureClass = featureWorkspace.OpenFeatureClass(nameOfShapefile);

　　 Console.WriteLine("There are {0} features in the {1} feature class", featureClass.FeatureCount(new QueryFilterClass()), featureClass.AliasName);

}

//The generic form can be used with any type of workspace

//e.g., nameOfFeatureClass = "States";

//on ArcSDE use ISqlSyntax::QualifyTableName for fully qualified table names.

public IFeatureClass getIFeatureClass(IWorkspace workspace, string nameOfFeatureClass)

{

　　//cast for the feature workspace from the workspace

　　IFeatureWorkspace      featureWorkspace = (IFeatureWorkspace)workspace;

　　//open the featureclass

　　return featureWorkspace.OpenFeatureClass(nameOfFeatureClass);

}