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private void barButtonItem1_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
{
OpenFileDialog dlg = new OpenFileDialog();
dlg.Title = "打开文件";
dlg.Filter = "(*.mdb)|*.mdb|All Files(*.*)|*.* ";
dlg.ShowDialog();
string path = dlg.FileName;


IWorkspaceFactory pAccessWorkspaceFactory;
IFeatureWorkspace pFeatureWorkspace;
IFeatureLayer pFeatureLayer;
IFeatureDataset pFeatureDataset;
pAccessWorkspaceFactory = new AccessWorkspaceFactoryClass();


IWorkspace pWorkspace = pAccessWorkspaceFactory.OpenFromFile(path, 0);
IEnumDataset pEnumDataset = pWorkspace.get_Datasets(ESRI.ArcGIS.Geodatabase.esriDatasetType.esriDTAny);
pEnumDataset.Reset();
IDataset pDataset = pEnumDataset.Next();


if (pDataset is IFeatureDataset)
{
pFeatureWorkspace = (IFeatureWorkspace)pAccessWorkspaceFactory.OpenFromFile(path, 0);
pFeatureDataset = pFeatureWorkspace.OpenFeatureDataset(pDataset.Name);
IEnumDataset pEnumDataset1 = pFeatureDataset.Subsets;
pEnumDataset1.Reset();
IDataset pDataset1 = pEnumDataset1.Next();


if (pDataset1 is IFeatureClass)
{
pFeatureLayer = new FeatureLayerClass();
pFeatureLayer.FeatureClass = pFeatureWorkspace.OpenFeatureClass(pDataset1.Name);
pFeatureLayer.Name = pFeatureLayer.FeatureClass.AliasName;
axMapControl1.Map.AddLayer(pFeatureLayer);
axMapControl1.ActiveView.Refresh();
}
}
else
{
pFeatureWorkspace = (IFeatureWorkspace)pWorkspace;
pFeatureLayer = new FeatureLayerClass();
pFeatureLayer.FeatureClass = pFeatureWorkspace.OpenFeatureClass(pDataset.Name);
pFeatureLayer.Name = pFeatureLayer.FeatureClass.AliasName;
axMapControl1.Map.AddLayer(pFeatureLayer);
axMapControl1.ActiveView.Refresh();
}
}

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