FdoToolbox.Base.Forms.FdoMultiClassPicker.GetClasses C# (CSharp) Метод

        public static IList<OSGeo.FDO.Schema.ClassDefinition> GetClasses(string title, string message, FdoConnection conn)
        {
            OSGeo.FDO.Schema.FeatureSchemaCollection schemas = null;
            using (FdoFeatureService service = conn.CreateFeatureService())
            {
                schemas = service.DescribeSchema();
            }
            if (schemas != null)
            {
                FdoMultiClassPicker diag = new FdoMultiClassPicker(title, message, schemas);
                if (diag.ShowDialog() == DialogResult.OK)
                {
                    return diag.SelectedClasses;
                }
            }
            return null;
        }

        private void btnComputeExtents_Click(object sender, EventArgs e)
        {
            IList <ClassDefinition> classes = FdoMultiClassPicker.GetClasses(
                ResourceService.GetString("TITLE_COMPUTE_EXTENTS"),
                ResourceService.GetString("MSG_SELECT_EXTENT_CLASSES"),
                _presenter.Connection);

            if (classes != null)
            {
                _presenter.ComputeExtents(classes);
            }
        }