// Creates Dialog on first call and init filter
private void InitBarriersDlg()
{
if (m_dlgBarriers == null)
{
// Create Barriers dialog
m_dlgBarriers = new GxDialogClass();
IGxObjectFilter objFilter = null;
objFilter = new GxFilterFeatureDatasetsAndFeatureClassesClass();
m_dlgBarriers.ObjectFilter = objFilter;
m_dlgBarriers.Title = "Choose Barriers Layer";
}
}
//使用GxDialog对话框选择要输出的数据源（要素集和（或）要素类、shapefile文件）
private IEnumGxObject AddLayerWithGxDialog()
{
try
{
IGxDialog gxDlg = new GxDialogClass();
// create a data format filter
IGxObjectFilter gxObjFilter = new GxFilterFeatureDatasetsAndFeatureClassesClass();
// set the properties of the open dialog
gxDlg.Title = "Add Feature Datasets and/or Feature Classes";
gxDlg.ObjectFilter = gxObjFilter;
gxDlg.AllowMultiSelect = true;
gxDlg.RememberLocation = true;
IEnumGxObject gxObjects;
bool open = gxDlg.DoModalOpen(0, out gxObjects);
IGxDataset gxDataset = gxObjects.Next() as IGxDataset;
if (gxDataset != null)
{
if (gxDataset.Dataset is IFeatureClass)
{
IFeatureClass featureClass = gxDataset.Dataset as IFeatureClass;
IFeatureDataset featureDataSet = featureClass.FeatureDataset;
if (featureDataSet == null)
{
IWorkspaceFactory pWorkspaceFactory = new ShapefileWorkspaceFactoryClass();
featureWorkspace = pWorkspaceFactory.OpenFromFile(gxDlg.FinalLocation.FullName, this.Handle.ToInt32()) as IFeatureWorkspace;
}
else
{
featureWorkspace = featureDataSet.Workspace as IFeatureWorkspace;
}
}
else if (gxDataset.Dataset is IFeatureDataset)
{
IFeatureDataset featureDataSet = gxDataset.Dataset as IFeatureDataset;
featureWorkspace = featureDataSet.Workspace as IFeatureWorkspace;
}
}
return(gxObjects);
}
catch
{
MessageBox.Show("不能打开数据集或要素类！！", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
return(null);
}
