diff --git a/designer-base/src/main/java/com/fr/design/data/datapane/TableDataComboBox.java b/designer-base/src/main/java/com/fr/design/data/datapane/TableDataComboBox.java
index 3db9c3aff1..6f93848a7e 100644
--- a/designer-base/src/main/java/com/fr/design/data/datapane/TableDataComboBox.java
+++ b/designer-base/src/main/java/com/fr/design/data/datapane/TableDataComboBox.java
@@ -1,6 +1,8 @@
 package com.fr.design.data.datapane;
 
+import com.fr.design.constants.UIConstants;
 import java.awt.Component;
+import java.awt.Dimension;
 import java.awt.event.ItemEvent;
 import java.util.Iterator;
 import java.util.Map.Entry;
@@ -23,7 +25,7 @@ import com.fr.stable.StringUtils;
 
 /**
  * 包含所有数据集的下拉框
- * 
+ *
  * @author zhou
  * @since 2012-4-20上午10:34:30
  */
@@ -43,22 +45,29 @@ public class TableDataComboBox extends UIComboBox implements Prepare4DataSourceC
         this.treeName = treeName;
 		this.setRenderer(new UIComboBoxRenderer() {
 			private static final long serialVersionUID = 1L;
+			private boolean labelVisible = true;
 
 			@Override
 			public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
 				JLabel renderer = (JLabel)super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
-				if (index == -1 && value == null) {
-					// 显示空白
+				if (value instanceof TableDataWrapper) {
+					labelVisible = true;
+					TableDataWrapper tableDataWrapper = (TableDataWrapper)value;
+					renderer.setIcon(tableDataWrapper.getIcon());
+					renderer.setText(tableDataWrapper.getTableDataName());
+					renderer.setToolTipText(tableDataWrapper.getTableDataName());
+				} else {
+					labelVisible = false;
 					renderer.setIcon(null);
 					renderer.setText(StringUtils.EMPTY);
-				}else if (value instanceof TableDataWrapper) {
-					TableDataWrapper tabledatawrappe = (TableDataWrapper)value;
-					renderer.setIcon(tabledatawrappe.getIcon());
-					renderer.setText(tabledatawrappe.getTableDataName());
-					renderer.setToolTipText(tabledatawrappe.getTableDataName());
 				}
 				return renderer;
 			}
+
+			@Override
+			public Dimension getPreferredSize() {
+				return labelVisible ? super.getPreferredSize() : new Dimension(super.getPreferredSize().width, 0);
+			}
 		});
 		refresh(source);
         registerDSChangeListener();
@@ -75,6 +84,7 @@ public class TableDataComboBox extends UIComboBox implements Prepare4DataSourceC
         setDsMap();
 		DefaultComboBoxModel model = new DefaultComboBoxModel();
 		this.setModel(model);
+		model.addElement(UIConstants.PENDING);
 		// 遍历添加所有数据项到模型
 		Iterator<Entry<String, TableDataWrapper>> entryIt = dsMap.entrySet().iterator();
 		while (entryIt.hasNext()) {
@@ -83,8 +93,6 @@ public class TableDataComboBox extends UIComboBox implements Prepare4DataSourceC
                 model.addElement(tableDataWrapper);
             }
 		}
-		// 设置默认选项为空白
-		this.setSelectedItem(null);
         if (dataWrapper != null) {
             if (DesignTableDataManager.isDsNameChanged(dataWrapper.getTableDataName())) {
                 this.setSelectedTableDataByName(DesignTableDataManager.getChangedDsNameByOldDsName(dataWrapper.getTableDataName()));