REPORT-27207 表单填报，入库设置三个类型，设置后，显示问题

designer-base/src/main/java/com/fr/design/editor/editor/WidgetNameEditor.java

@@ -4,6 +4,7 @@ import com.fr.design.DesignModelAdapter;
 import com.fr.design.gui.icombobox.FilterComboBox;
 import com.fr.design.gui.icombobox.UIComboBoxRenderer;
 import com.fr.design.layout.FRGUIPaneFactory;
+import com.fr.stable.StringUtils;
 import com.fr.stable.js.WidgetName;
 
 import javax.swing.JList;
@@ -19,6 +20,8 @@ import java.awt.Component;
  * @since 2012-3-29下午6:04:37
  */
 public class WidgetNameEditor extends Editor<WidgetName> {
+	static final WidgetName EMPTY_WIDGET_NAME = new WidgetName(StringUtils.EMPTY);
+
 	private FilterComboBox<WidgetName> comb;
 
 
@@ -79,7 +82,8 @@ public class WidgetNameEditor extends Editor<WidgetName> {
 
 	@Override
 	public WidgetName getValue() {
-		return (WidgetName) comb.getSelectedItem();
+		WidgetName widgetName = (WidgetName) comb.getSelectedItem();
+		return widgetName == null ? EMPTY_WIDGET_NAME : widgetName;
 	}
 
 	@Override