The following code sets up an SDE workspace factory and workspace. The workspace is then asked for it's feature dataset names. The names are returned as an enumeration which is cycled through and the name of each dataset is added to a list box.

[Visual Basic 6.0]
  Dim pSdeWorkspaceFactory As IWorkspaceFactory
  Dim pSdeWorkspace As IWorkspace
  Dim pSdeDSName As IDatasetName
  Dim pEnumDSName As IEnumDatasetName
   
  Set pSdeWorkspaceFactory = New SdeWorkspaceFactory
  Set pSdeWorkspace = pSdeWorkspaceFactory.OpenFromFile("D:\data\redarrow.sde")
  Set pEnumDSName = pSdeWorkspace.DatasetNames(esriDTFeatureDataset)
  Set pSdeDSName = pEnumDSName.Next
     
  While Not pSdeDSName Is Nothing
    List1.AddItem pSdeDSName.Name
    Set pSdeDSName = pEnumDSName.Next
  Wend  
 

[C#]
    //IWorkspace DatasetNames Example
    public void IWorkspace_DatasetNames_Example(IWorkspace workspace)
    {
        //This function asks the workspace for its feature dataset names.
        //The names are returned as an enumeration which is cycled through and the 
        //name of each dataset is printed.
        IEnumDatasetName enumDatasetName = workspace.get_DatasetNames(esriDatasetType.esriDTFeatureDataset);
        IDatasetName datasetName = enumDatasetName.Next();
        while (datasetName != null)
        {
            Console.WriteLine(datasetName.Name);
            datasetName = enumDatasetName.Next();
        }
    }

[Visual Basic .NET, C++]
No example is available for Visual Basic .NET or C++. To view a Visual Basic 6.0 or C# example, click the Language Filter button in the upper-left corner of the page.