diff --git a/AIStudio.Wpf.DiagramApp/ViewModels/PageViewModel.cs b/AIStudio.Wpf.DiagramApp/ViewModels/PageViewModel.cs
index 4359f48..e31f979 100644
--- a/AIStudio.Wpf.DiagramApp/ViewModels/PageViewModel.cs
+++ b/AIStudio.Wpf.DiagramApp/ViewModels/PageViewModel.cs
@@ -409,6 +409,8 @@ namespace AIStudio.Wpf.DiagramApp.ViewModels
                     viewModel.Items.Add(connectionVM);
                 }
 
+                viewModel.Thumbnail = diagramItem.Thumbnail;
+
                 viewModels.Add(viewModel);
             }
             DiagramViewModels = new ObservableCollection<IDiagramViewModel>(viewModels);
@@ -450,6 +452,7 @@ namespace AIStudio.Wpf.DiagramApp.ViewModels
 
                 diagramItem.DesignerItems = selectedDesignerItems.Select(p => p.ToSerializableItem(ext)).Where(p => p != null).ToList();
                 diagramItem.Connections = selectedConnections.Select(p => p.ToSerializableItem(ext)).Where(p => p != null).ToList();
+                diagramItem.Thumbnail = viewModel.Thumbnail;
 
                 diagramDocument.DiagramItems.Add(diagramItem);
             }
@@ -502,6 +505,7 @@ namespace AIStudio.Wpf.DiagramApp.ViewModels
 
                 diagramItem.DesignerItems = selectedDesignerItems.Select(p => p.ToSerializableItem("json")).Where(p => p != null).ToList();
                 diagramItem.Connections = selectedConnections.Select(p => p.ToSerializableItem("json")).Where(p => p != null).ToList();
+                diagramItem.Thumbnail = viewModel.Thumbnail;
 
                 viewModel = new DiagramViewModel(diagramItem);
                 viewModel.Name = NewNameHelper.GetNewName(DiagramViewModels.Select(p => p.Name), "页-");
@@ -531,6 +535,7 @@ namespace AIStudio.Wpf.DiagramApp.ViewModels
                     connectionVM.Id = Guid.NewGuid();
                     viewModel.Items.Add(connectionVM);
                 }
+                viewModel.Thumbnail = diagramItem.Thumbnail;
 
                 DiagramViewModels.Add(viewModel);
                 DiagramViewModel = viewModel;
diff --git a/AIStudio.Wpf.DiagramApp/Views/MainWindow.xaml b/AIStudio.Wpf.DiagramApp/Views/MainWindow.xaml
index 80936f9..a9d5ee9 100644
--- a/AIStudio.Wpf.DiagramApp/Views/MainWindow.xaml
+++ b/AIStudio.Wpf.DiagramApp/Views/MainWindow.xaml
@@ -915,8 +915,7 @@
                         </Fluent:SplitButton.ToolTip>
                     </Fluent:SplitButton>-->
 
-                    <Fluent:SplitButton Header="形状" GroupName="DrawMode" IsCheckable="True" IsChecked="{Binding DrawingDrawModeSelected}"  Width="50" VerticalAlignment="Top">
-                        <Fluent:MenuItem Header="橡皮檫" Size="Middle" IsCheckable="True" IsChecked="{Binding DrawingDrawMode,Converter={dd:ConverterValueMapToBool Parameter='Eraser'}, ConverterParameter='Eraser'}" Icon="{iconPacks:Material Kind=Eraser}" />
+                    <Fluent:SplitButton Header="形状" GroupName="DrawMode" IsCheckable="True" IsChecked="{Binding DrawingDrawModeSelected}"  Width="50" VerticalAlignment="Top">                   
                         <Fluent:MenuItem Header="矩形工具" Size="Middle" IsCheckable="True" IsChecked="{Binding DrawingDrawMode,Converter={dd:ConverterValueMapToBool Parameter='Rectangle'}, ConverterParameter='Rectangle'}" Icon="{iconPacks:Material Kind=RectangleOutline}" />
                         <Fluent:MenuItem Header="椭圆工具" Size="Middle" IsCheckable="True" IsChecked="{Binding DrawingDrawMode,Converter={dd:ConverterValueMapToBool Parameter='Ellipse'}, ConverterParameter='Ellipse'}" Icon="{iconPacks:Material Kind=EllipseOutline}" />
                         <Fluent:MenuItem Header="线条工具" Size="Middle" IsCheckable="True" IsChecked="{Binding DrawingDrawMode,Converter={dd:ConverterValueMapToBool Parameter='Line'}, ConverterParameter='Line'}" Icon="{iconPacks:Material Kind=Minus}" />
@@ -1526,6 +1525,63 @@
                     </Fluent:SplitButton>
                 </Fluent:RibbonGroupBox>
             </Fluent:RibbonTabItem>
+            <Fluent:RibbonTabItem Header="绘图">
+                <Fluent:RibbonGroupBox Header="查找"
+                                       IsLauncherVisible="True"   >
+
+                    <Fluent:SplitButton Header="选择" GroupName="DrawMode" IsCheckable="True" IsChecked="{Binding LineDrawModeSelected}" Icon="{iconPacks:Material Kind=VectorPolyline}" Width="50" VerticalAlignment="Top">
+                        <Fluent:MenuItem Header="曲线连接线" Size="Middle" IsCheckable="True" IsChecked="{Binding LineDrawMode,Converter={dd:ConverterValueMapToBool Parameter='ConnectingLineSmooth'}, ConverterParameter='ConnectingLineSmooth'}" Icon="{iconPacks:Material Kind=VectorRadius}"/>
+                        <Fluent:MenuItem Header="直线连接线" Size="Middle" IsCheckable="True" IsChecked="{Binding LineDrawMode,Converter={dd:ConverterValueMapToBool Parameter='ConnectingLineStraight'}, ConverterParameter='ConnectingLineStraight'}" Icon="{iconPacks:Material Kind=VectorLine}"/>
+                        <Fluent:MenuItem Header="折线连接线" Size="Middle" IsCheckable="True" IsChecked="{Binding LineDrawMode,Converter={dd:ConverterValueMapToBool Parameter='ConnectingLineCorner'}, ConverterParameter='ConnectingLineCorner'}" Icon="{iconPacks:Material Kind=VectorPolyline}"/>
+                        <Fluent:MenuItem Header="边界连接线" Size="Middle" IsCheckable="True" IsChecked="{Binding LineDrawMode,Converter={dd:ConverterValueMapToBool Parameter='ConnectingLineBoundary'}, ConverterParameter='ConnectingLineBoundary'}" Icon="{iconPacks:Material Kind=VectorPolylineEdit}"/>
+                        <Fluent:MenuItem Header="自动连接" Size="Middle" IsCheckable="True" IsChecked="{Binding EnableSnapping}" Icon="{iconPacks:Material Kind=TransitConnectionHorizontal}"/>
+                        <Fluent:SplitButton.Style>
+                            <Style TargetType="{x:Type Fluent:SplitButton}" BasedOn="{StaticResource RibbonSplitButtonStyle}">
+                                <Setter Property="LargeIcon">
+                                    <Setter.Value>
+                                        <iconPacks:PackIconMaterial Kind="VectorPolyline" VerticalAlignment="Center" HorizontalAlignment="Center"/>
+                                    </Setter.Value>
+                                </Setter>
+                                <Style.Triggers>
+                                    <DataTrigger Binding="{Binding LineDrawMode}" Value="ConnectingLineSmooth">
+                                        <Setter Property="LargeIcon">
+                                            <Setter.Value>
+                                                <iconPacks:PackIconMaterial Kind="VectorRadius" VerticalAlignment="Center" HorizontalAlignment="Center"/>
+                                            </Setter.Value>
+                                        </Setter>
+                                    </DataTrigger>
+                                    <DataTrigger Binding="{Binding LineDrawMode}" Value="ConnectingLineStraight">
+                                        <Setter Property="LargeIcon">
+                                            <Setter.Value>
+                                                <iconPacks:PackIconMaterial Kind="VectorLine" VerticalAlignment="Center" HorizontalAlignment="Center"/>
+                                            </Setter.Value>
+                                        </Setter>
+                                    </DataTrigger>
+                                    <DataTrigger Binding="{Binding LineDrawMode}" Value="ConnectingLineCorner">
+                                        <Setter Property="LargeIcon">
+                                            <Setter.Value>
+                                                <iconPacks:PackIconMaterial Kind="VectorPolyline" VerticalAlignment="Center" HorizontalAlignment="Center"/>
+                                            </Setter.Value>
+                                        </Setter>
+                                    </DataTrigger>
+                                    <DataTrigger Binding="{Binding LineDrawMode}" Value="ConnectingLineBoundary">
+                                        <Setter Property="LargeIcon">
+                                            <Setter.Value>
+                                                <iconPacks:PackIconMaterial Kind="VectorPolylineEdit" VerticalAlignment="Center" HorizontalAlignment="Center"/>
+                                            </Setter.Value>
+                                        </Setter>
+                                    </DataTrigger>
+                                </Style.Triggers>
+                            </Style>
+                        </Fluent:SplitButton.Style>
+                        <Fluent:SplitButton.ToolTip>
+                            <Fluent:ScreenTip Title="Line"
+                                              Text="添加连接线"
+                                              Width="190" />
+                        </Fluent:SplitButton.ToolTip>
+                    </Fluent:SplitButton>
+                </Fluent:RibbonGroupBox>              
+            </Fluent:RibbonTabItem>
             <Fluent:RibbonTabItem Header="页面布局">
                 <Fluent:RibbonGroupBox Header="页面"
                                        IsLauncherVisible="True">
diff --git a/AIStudio.Wpf.DiagramDesigner/Adorners/DrawingRubberbandAdorner.cs b/AIStudio.Wpf.DiagramDesigner/Adorners/DrawingRubberbandAdorner.cs
index 890e967..fdc1bbb 100644
--- a/AIStudio.Wpf.DiagramDesigner/Adorners/DrawingRubberbandAdorner.cs
+++ b/AIStudio.Wpf.DiagramDesigner/Adorners/DrawingRubberbandAdorner.cs
@@ -65,29 +65,36 @@ namespace AIStudio.Wpf.DiagramDesigner
                 _rubberbandBrush = null;
                 _rubberbandPen = new Pen(new SolidColorBrush(Colors.Red) { Opacity = 0.5 }, _drawingDesignerItem.ColorViewModel.LineWidth);
             }
-            else if (DrawMode >= DrawMode.Line && DrawMode <= DrawMode.DirectLine)
+            else if (DrawMode == DrawMode.EraserPreview)
             {
-                if (DrawMode == DrawMode.Line)
+                _drawingDesignerItem = new EraserPreviewDrawingDesignerItemViewModel(_viewModel, dragStartPoint);
+
+                _rubberbandBrush = null;
+                _rubberbandPen = new Pen(new SolidColorBrush(Colors.Red) { Opacity = 0.5 }, _drawingDesignerItem.ColorViewModel.LineWidth);
+            }
+            else if (DrawMode >= DrawMode.ErasableLine && DrawMode <= DrawMode.ErasableDirectLine)
+            {
+                if (DrawMode == DrawMode.ErasableLine)
                 {
                     _drawingDesignerItem = new LineDrawingDesignerItemViewModel(_viewModel, dragStartPoint, true);
                 }
-                else if (DrawMode == DrawMode.Rectangle)
+                else if (DrawMode == DrawMode.ErasableRectangle)
                 {
                     _drawingDesignerItem = new RectangleDrawingDesignerItemViewModel(_viewModel, dragStartPoint, true);
                 }
-                else if (DrawMode == DrawMode.Ellipse)
+                else if (DrawMode == DrawMode.ErasableEllipse)
                 {
                     _drawingDesignerItem = new EllipseDrawingDesignerItemViewModel(_viewModel, dragStartPoint, true);
                 }
-                else if (DrawMode == DrawMode.Polyline)
+                else if (DrawMode == DrawMode.ErasablePolyline)
                 {
                     _drawingDesignerItem = new PolylineDrawingDesignerItemViewModel(_viewModel, dragStartPoint, true);
                 }
-                else if (DrawMode == DrawMode.Polygon)
+                else if (DrawMode == DrawMode.ErasablePolygon)
                 {
                     _drawingDesignerItem = new PolygonDrawingDesignerItemViewModel(_viewModel, dragStartPoint, true);
                 }
-                else if (DrawMode == DrawMode.DirectLine)
+                else if (DrawMode == DrawMode.ErasableDirectLine)
                 {
                     _drawingDesignerItem = new DirectLineDrawingDesignerItemViewModel(_viewModel, dragStartPoint, true);
                 }
@@ -96,29 +103,29 @@ namespace AIStudio.Wpf.DiagramDesigner
                 _rubberbandPen = new Pen(ColorObject.ToBrush(_drawingDesignerItem.ColorViewModel.LineColor), _drawingDesignerItem.ColorViewModel.LineWidth);
                 _rubberbandPen.DashStyle = new DashStyle(StrokeDashArray.Dash[(int)_drawingDesignerItem.ColorViewModel.LineDashStyle], 1);
             }
-            else if (DrawMode >= DrawMode.FillableLine && DrawMode <= DrawMode.FillableDirectLine)
+            else if (DrawMode >= DrawMode.Line && DrawMode <= DrawMode.DirectLine)
             {
-                if (DrawMode == DrawMode.FillableLine)
+                if (DrawMode == DrawMode.Line)
                 {
                     _drawingDesignerItem = new LineDrawingDesignerItemViewModel(_viewModel, dragStartPoint, false);
                 }
-                else if (DrawMode == DrawMode.FillableRectangle)
+                else if (DrawMode == DrawMode.Rectangle)
                 {
                     _drawingDesignerItem = new RectangleDrawingDesignerItemViewModel(_viewModel, dragStartPoint, false);
                 }
-                else if (DrawMode == DrawMode.FillableEllipse)
+                else if (DrawMode == DrawMode.Ellipse)
                 {
                     _drawingDesignerItem = new EllipseDrawingDesignerItemViewModel(_viewModel, dragStartPoint, false);
                 }
-                else if (DrawMode == DrawMode.FillablePolyline)
+                else if (DrawMode == DrawMode.Polyline)
                 {
                     _drawingDesignerItem = new PolylineDrawingDesignerItemViewModel(_viewModel, dragStartPoint, false);
                 }
-                else if (DrawMode == DrawMode.FillablePolygon)
+                else if (DrawMode == DrawMode.Polygon)
                 {
                     _drawingDesignerItem = new PolygonDrawingDesignerItemViewModel(_viewModel, dragStartPoint, false);
                 }
-                else if (DrawMode == DrawMode.FillableDirectLine)
+                else if (DrawMode == DrawMode.DirectLine)
                 {
                     _drawingDesignerItem = new DirectLineDrawingDesignerItemViewModel(_viewModel, dragStartPoint, false);
                 }
diff --git a/AIStudio.Wpf.DiagramDesigner/Enums/DrawMode.cs b/AIStudio.Wpf.DiagramDesigner/Enums/DrawMode.cs
index 564f26c..32af512 100644
--- a/AIStudio.Wpf.DiagramDesigner/Enums/DrawMode.cs
+++ b/AIStudio.Wpf.DiagramDesigner/Enums/DrawMode.cs
@@ -13,19 +13,23 @@ namespace AIStudio.Wpf.DiagramDesigner
         ConnectingLineBoundary = 13,
         //101-110为可部分擦除的形状
         Eraser = 100,
-        Line = 101,
-        Rectangle = 102,
-        Ellipse = 103,
-        Polyline = 104,
-        Polygon = 105,
-        DirectLine = 106,
-        //不可部分擦除
-        FillableLine = 111,
-        FillableRectangle = 112,
-        FillableEllipse = 113,
-        FillablePolyline = 114,
-        FillablePolygon = 115,
-        FillableDirectLine = 116,
+        EraserPreview = 101,
+        ErasableLine = 110,
+        ErasableRectangle = 111,
+        ErasableEllipse = 112,
+        ErasablePolyline = 113,
+        ErasablePolygon = 114,
+        ErasableDirectLine = 115,
+
         Text = 200,
+        Line = 210,
+        Rectangle = 211,
+        Ellipse = 212,
+        Polyline = 213,
+        Polygon = 214,
+        DirectLine = 215,
+
+      
+
     }
 }
diff --git a/AIStudio.Wpf.DiagramDesigner/Models/Serializables/DiagramItem.cs b/AIStudio.Wpf.DiagramDesigner/Models/Serializables/DiagramItem.cs
index c7d673a..466937b 100644
--- a/AIStudio.Wpf.DiagramDesigner/Models/Serializables/DiagramItem.cs
+++ b/AIStudio.Wpf.DiagramDesigner/Models/Serializables/DiagramItem.cs
@@ -167,6 +167,10 @@ namespace AIStudio.Wpf.DiagramDesigner
         [XmlArray]
         public List<SerializableItem> Connections { get; set; } = new List<SerializableItem>();
 
-
+        [XmlAttribute]
+        public string Thumbnail
+        {
+            get; set;
+        }
     }
 }
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/DrawModeViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/DrawModeViewModel.cs
index 81d48cd..dd81b7a 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/DrawModeViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/DrawModeViewModel.cs
@@ -146,7 +146,7 @@ namespace AIStudio.Wpf.DiagramDesigner
             }
         }
 
-        private DrawMode _shapeDrawMode = DrawMode.Rectangle;
+        private DrawMode _shapeDrawMode = DrawMode.ErasableRectangle;
         public DrawMode DrawingDrawMode
         {
             get
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DiagramViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DiagramViewModel.cs
index d045eff..24555ca 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DiagramViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DiagramViewModel.cs
@@ -9,6 +9,7 @@ using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Input;
 using System.Windows.Media;
+using System.Xml.Serialization;
 using AIStudio.Wpf.DiagramDesigner.Geometrys;
 using AIStudio.Wpf.DiagramDesigner.Helpers;
 using AIStudio.Wpf.DiagramDesigner.Models;
@@ -669,6 +670,10 @@ namespace AIStudio.Wpf.DiagramDesigner
                 return menuOptions;
             }
         }
+        public string Thumbnail
+        {
+            get; set;
+        }
 
         public bool ShowMenuOptions
         {
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/DirectLineDrawingDesignerItemViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/DirectLineDrawingDesignerItemViewModel.cs
index 64dcf2f..9ee1e7f 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/DirectLineDrawingDesignerItemViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/DirectLineDrawingDesignerItemViewModel.cs
@@ -20,11 +20,11 @@ namespace AIStudio.Wpf.DiagramDesigner
         {
         }
 
-        public DirectLineDrawingDesignerItemViewModel(IDiagramViewModel root, Point startPoint, bool erasable) : base(root, DrawMode.DirectLine, startPoint, erasable)
+        public DirectLineDrawingDesignerItemViewModel(IDiagramViewModel root, Point startPoint, bool erasable) : base(root, DrawMode.ErasableDirectLine, startPoint, erasable)
         {
         }
 
-        public DirectLineDrawingDesignerItemViewModel(IDiagramViewModel root, List<Point> points, bool erasable) : base(root, DrawMode.DirectLine, points, erasable)
+        public DirectLineDrawingDesignerItemViewModel(IDiagramViewModel root, List<Point> points, bool erasable) : base(root, DrawMode.ErasableDirectLine, points, erasable)
         {
         }
 
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/EllipseDrawingDesignerItemViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/EllipseDrawingDesignerItemViewModel.cs
index f05f9fa..9020688 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/EllipseDrawingDesignerItemViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/EllipseDrawingDesignerItemViewModel.cs
@@ -19,11 +19,11 @@ namespace AIStudio.Wpf.DiagramDesigner
         {
         }
 
-        public EllipseDrawingDesignerItemViewModel(IDiagramViewModel root, Point startPoint, bool erasable) : base(root, DrawMode.Rectangle, startPoint, erasable)
+        public EllipseDrawingDesignerItemViewModel(IDiagramViewModel root, Point startPoint, bool erasable) : base(root, DrawMode.ErasableRectangle, startPoint, erasable)
         {
         }
 
-        public EllipseDrawingDesignerItemViewModel(IDiagramViewModel root, List<Point> points, bool erasable) : base(root, DrawMode.Rectangle, points, erasable)
+        public EllipseDrawingDesignerItemViewModel(IDiagramViewModel root, List<Point> points, bool erasable) : base(root, DrawMode.ErasableRectangle, points, erasable)
         {
         }
 
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/LineDrawingDesignerItemViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/LineDrawingDesignerItemViewModel.cs
index 5681cde..49a0b33 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/LineDrawingDesignerItemViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/LineDrawingDesignerItemViewModel.cs
@@ -20,11 +20,11 @@ namespace AIStudio.Wpf.DiagramDesigner
         {
         }
 
-        public LineDrawingDesignerItemViewModel(IDiagramViewModel root, Point startPoint, bool erasable) : base(root, DrawMode.Line, startPoint, erasable)
+        public LineDrawingDesignerItemViewModel(IDiagramViewModel root, Point startPoint, bool erasable) : base(root, DrawMode.ErasableLine, startPoint, erasable)
         {                    
         }
 
-        public LineDrawingDesignerItemViewModel(IDiagramViewModel root, List<Point> points, bool erasable) : base(root, DrawMode.Line, points, erasable)
+        public LineDrawingDesignerItemViewModel(IDiagramViewModel root, List<Point> points, bool erasable) : base(root, DrawMode.ErasableLine, points, erasable)
         {
 
         }
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/PolygonDrawingDesignerItemViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/PolygonDrawingDesignerItemViewModel.cs
index 2d0da84..6e4cc0f 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/PolygonDrawingDesignerItemViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/PolygonDrawingDesignerItemViewModel.cs
@@ -16,11 +16,11 @@ namespace AIStudio.Wpf.DiagramDesigner
         {
         }
 
-        public PolygonDrawingDesignerItemViewModel(IDiagramViewModel root, Point startPoint, bool erasable) : base(root, DrawMode.Line, startPoint, erasable)
+        public PolygonDrawingDesignerItemViewModel(IDiagramViewModel root, Point startPoint, bool erasable) : base(root, DrawMode.ErasableLine, startPoint, erasable)
         {
         }
 
-        public PolygonDrawingDesignerItemViewModel(IDiagramViewModel root, List<Point> points, bool erasable) : base(root, DrawMode.Line, points, erasable)
+        public PolygonDrawingDesignerItemViewModel(IDiagramViewModel root, List<Point> points, bool erasable) : base(root, DrawMode.ErasableLine, points, erasable)
         {
 
         }
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/PolylineDrawingDesignerItemViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/PolylineDrawingDesignerItemViewModel.cs
index ebdfcfc..cd42367 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/PolylineDrawingDesignerItemViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/PolylineDrawingDesignerItemViewModel.cs
@@ -21,11 +21,11 @@ namespace AIStudio.Wpf.DiagramDesigner
         {
         }
 
-        public PolylineDrawingDesignerItemViewModel(IDiagramViewModel root, Point startPoint, bool erasable) : base(root, DrawMode.Line, startPoint, erasable)
+        public PolylineDrawingDesignerItemViewModel(IDiagramViewModel root, Point startPoint, bool erasable) : base(root, DrawMode.ErasableLine, startPoint, erasable)
         {
         }
 
-        public PolylineDrawingDesignerItemViewModel(IDiagramViewModel root, List<Point> points, bool erasable) : base(root, DrawMode.Line, points, erasable)
+        public PolylineDrawingDesignerItemViewModel(IDiagramViewModel root, List<Point> points, bool erasable) : base(root, DrawMode.ErasableLine, points, erasable)
         {
 
         }
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/RectangleDrawingDesignerItemViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/RectangleDrawingDesignerItemViewModel.cs
index b4e8a07..f7b5c07 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/RectangleDrawingDesignerItemViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/RectangleDrawingDesignerItemViewModel.cs
@@ -19,11 +19,11 @@ namespace AIStudio.Wpf.DiagramDesigner
         {
         }
 
-        public RectangleDrawingDesignerItemViewModel(IDiagramViewModel root, Point startPoint, bool erasable) : base(root, DrawMode.Rectangle, startPoint, erasable)
+        public RectangleDrawingDesignerItemViewModel(IDiagramViewModel root, Point startPoint, bool erasable) : base(root, DrawMode.ErasableRectangle, startPoint, erasable)
         {
         }
 
-        public RectangleDrawingDesignerItemViewModel(IDiagramViewModel root, List<Point> points, bool erasable) : base(root, DrawMode.Rectangle, points, erasable)
+        public RectangleDrawingDesignerItemViewModel(IDiagramViewModel root, List<Point> points, bool erasable) : base(root, DrawMode.ErasableRectangle, points, erasable)
         {
         }
 
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/IDiagramViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/IDiagramViewModel.cs
index e7e3cd7..50060f0 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/IDiagramViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/IDiagramViewModel.cs
@@ -5,6 +5,7 @@ using System.ComponentModel;
 using System.Windows;
 using System.Windows.Input;
 using System.Windows.Media;
+using System.Xml.Serialization;
 
 namespace AIStudio.Wpf.DiagramDesigner
 {
@@ -347,6 +348,10 @@ namespace AIStudio.Wpf.DiagramDesigner
         {
             get; set;
         }
+        string Thumbnail
+        {
+            get; set;
+        }
         #region 如果这个赋值了，优先用这个的
         IDrawModeViewModel DrawModeViewModel
         {