diff --git a/designer-realize/src/main/java/com/fr/design/mainframe/cell/settingpane/CellStylePane.java b/designer-realize/src/main/java/com/fr/design/mainframe/cell/settingpane/CellStylePane.java
index 1487908e7..370677860 100644
--- a/designer-realize/src/main/java/com/fr/design/mainframe/cell/settingpane/CellStylePane.java
+++ b/designer-realize/src/main/java/com/fr/design/mainframe/cell/settingpane/CellStylePane.java
@@ -102,7 +102,8 @@ public class CellStylePane extends AbstractCellAttrPane {
                         }
                         Style style = cellElement.getStyle();
                         if (style == null) {
-                            style = style.DEFAULT_STYLE;
+                            style = Style.DEFAULT_STYLE;
+
                         }
                         style = stylePane.updateStyle(style);
                         cellElement.setStyle(style);
diff --git a/designer-realize/src/main/java/com/fr/design/mainframe/form/FormReportComponentComposite.java b/designer-realize/src/main/java/com/fr/design/mainframe/form/FormReportComponentComposite.java
index 17f4bf348..a31dea5b3 100644
--- a/designer-realize/src/main/java/com/fr/design/mainframe/form/FormReportComponentComposite.java
+++ b/designer-realize/src/main/java/com/fr/design/mainframe/form/FormReportComponentComposite.java
@@ -19,6 +19,7 @@ import com.fr.grid.Grid;
 import com.fr.grid.GridUtils;
 import com.fr.report.ReportHelper;
 import com.fr.report.worksheet.FormElementCase;
+import com.fr.stable.AssistUtils;
 
 import javax.swing.*;
 import javax.swing.event.ChangeEvent;
@@ -128,7 +129,7 @@ public class FormReportComponentComposite extends JComponent implements TargetMo
         int row = reportPane.getSelection().getSelectedRows()[0];
         double rowLength = reportPane.getSelection().getSelectedRows().length;
         double rowExtent = reportPane.getGrid().getVerticalExtent();
-        if (columnLength == 0 || rowLength == 0) {
+        if (AssistUtils.equals(columnLength, 0d) || AssistUtils.equals(rowLength, 0d)) {
             return ScreenResolution.getScreenResolution();
         }
         double time = (columnExtent / columnLength) < (rowExtent / rowLength) ? (columnExtent / columnLength) : (rowExtent / rowLength);
diff --git a/designer-realize/src/main/java/com/fr/grid/AbstractGridHeaderMouseHandler.java b/designer-realize/src/main/java/com/fr/grid/AbstractGridHeaderMouseHandler.java
index 6c9363b9f..3873ae2e7 100644
--- a/designer-realize/src/main/java/com/fr/grid/AbstractGridHeaderMouseHandler.java
+++ b/designer-realize/src/main/java/com/fr/grid/AbstractGridHeaderMouseHandler.java
@@ -112,14 +112,18 @@ public abstract class AbstractGridHeaderMouseHandler extends MouseInputAdapter {
             if (between(evt, tmpSize1, tmpSize2)) {
                 if (index >= dragIndex) {
                     try {
-                        method.invoke(report, dragIndex, FU.valueOfPix(evtOffset(evt, oldEndValueSize), resolution));
+                        if(method != null) {
+                            method.invoke(report, dragIndex, FU.valueOfPix(evtOffset(evt, oldEndValueSize), resolution));
+                        }
                     } catch (Exception e) {
                         FineLoggerFactory.getLogger().error(e.getMessage(), e);
                     }
                     //sizeList.set(dragIndex, FU.valueOfPix(evtOffset(evt, oldEndValueSize), resolution));
                 } else {
                     try {
-                        method.invoke(report, index, FU.valueOfPix(evtOffset(evt, (int) tmpSize1), resolution));
+                        if(method != null) {
+                            method.invoke(report, index, FU.valueOfPix(evtOffset(evt, (int) tmpSize1), resolution));
+                        }
                     } catch (Exception e) {
                         FineLoggerFactory.getLogger().error(e.getMessage(), e);
                     }
@@ -127,7 +131,9 @@ public abstract class AbstractGridHeaderMouseHandler extends MouseInputAdapter {
                     // from all to do.
                     for (int h = (dragIndex - 1); h > index; h--) {
                         try {
-                            method.invoke(report, h, UNIT.ZERO);
+                            if(method != null) {
+                                method.invoke(report, h, UNIT.ZERO);
+                            }
                         } catch (Exception e) {
                             FineLoggerFactory.getLogger().error(e.getMessage(), e);
                         }