diff --git a/AIStudio.Wpf.DiagramDesigner/Controls/BlockItemsControl.xaml b/AIStudio.Wpf.DiagramDesigner/Controls/BlockItemsControl.xaml
index 72e6083..a26c554 100644
--- a/AIStudio.Wpf.DiagramDesigner/Controls/BlockItemsControl.xaml
+++ b/AIStudio.Wpf.DiagramDesigner/Controls/BlockItemsControl.xaml
@@ -12,7 +12,10 @@
             <Setter Property="Template">
                 <Setter.Value>
                     <ControlTemplate TargetType="{x:Type ListBoxItem}">
-                        <dd:BlockBorder>
+                        <dd:BlockBorder 
+                            dd:WidthAndHeightProps.Active="True"
+                            dd:WidthAndHeightProps.BoundActualWidth="{Binding ActualItemWidth,Mode=OneWayToSource}"
+                            dd:WidthAndHeightProps.BoundActualHeight="{Binding ActualItemHeight,Mode=OneWayToSource}">
                             <ContentControl Content="{TemplateBinding Content}" ContentTemplate="{TemplateBinding ContentTemplate}"/>
                         </dd:BlockBorder>
                     </ControlTemplate>
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/Container/BlockItemsContainerInfo.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/Container/BlockItemsContainerInfo.cs
index 7fd1698..f297fe4 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/Container/BlockItemsContainerInfo.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/Container/BlockItemsContainerInfo.cs
@@ -136,7 +136,13 @@ namespace AIStudio.Wpf.DiagramDesigner
         {
             var offset = GetOffSetFunc?.Invoke() ?? new Point(0, 0);
 
-            return new RectangleBase(DataItem.Left + offset.X, DataItem.Top + offset.Y, GetItemWidth(), GetItemHeight());
+            var containBound = new RectangleBase(DataItem.Left + offset.X, DataItem.Top + offset.Y, GetItemWidth(), GetItemHeight());
+            //foreach(var child in Children) 
+            //{ 
+            //    var bound = new RectangleBase(DataItem.Left + offset.X, DataItem.Top + offset.Y, child.GetItemWidth(), child.GetItemHeight());
+            //}
+
+            return containBound;
         }
 
         public BlockDesignerItemViewModel DataItem
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/BlockViewModel/BlockDesignerItemViewModelHelper.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/BlockViewModel/BlockDesignerItemViewModelHelper.cs
index 3c4d48b..d6812de 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/BlockViewModel/BlockDesignerItemViewModelHelper.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/BlockViewModel/BlockDesignerItemViewModelHelper.cs
@@ -8,142 +8,6 @@ namespace AIStudio.Wpf.DiagramDesigner
 {
     public static class BlockDesignerItemViewModelHelper
     {
-        /// <summary>
-        /// type=0最近且没有依附；=1
-        /// </summary>
-        /// <param name="blockDesignerItemViewModel"></param>
-        /// <param name="type"></param>
-        /// <returns></returns>
-        public static Tuple<FullyCreatedConnectorInfo, FullyCreatedConnectorInfo> FindNearPortToAttachTo(this IDiagramViewModel diagramViewModel, BlockDesignerItemViewModel blockDesignerItemViewModel, bool isExist)
-        {
-            if (blockDesignerItemViewModel == null)
-                return new Tuple<FullyCreatedConnectorInfo, FullyCreatedConnectorInfo>(null, null);
-
-            List<BlockDesignerItemViewModel> items;
-            if (isExist == false)
-            {
-                items = diagramViewModel.Items.OfType<BlockDesignerItemViewModel>().
-                 Where(p => p != blockDesignerItemViewModel && p != blockDesignerItemViewModel.Parent && p != blockDesignerItemViewModel.Next)
-                 .ToList();
-
-            }
-            else
-            {
-                items = diagramViewModel.Items.OfType<BlockDesignerItemViewModel>().
-                 Where(p => p != blockDesignerItemViewModel)
-                 .ToList();
-            }
-
-            FullyCreatedConnectorInfo parent = null;
-            FullyCreatedConnectorInfo next = null;
-
-            foreach (var port in items.SelectMany(n => n.Connectors))
-            {
-                foreach (var port2 in blockDesignerItemViewModel.Connectors)
-                {
-                    //parent
-                    if (parent == null)
-                    {
-                        if ((port.Orientation == ConnectorOrientation.Right && port2.Orientation == ConnectorOrientation.Left)
-                            || (port.Orientation == ConnectorOrientation.Bottom && port2.Orientation == ConnectorOrientation.Top))
-                        {
-
-                            if (port.Position.DistanceTo(port2.Position) < diagramViewModel.DiagramOption.SnappingOption.SnappingRadius)
-                            {
-                                port.DataItem.ShowConnectors = true;
-                                if (port2.CanAttachTo(port) == true)
-                                {
-                                    port.BeAttachTo = true;
-                                    parent = port;
-                                    continue;
-                                }
-                                else
-                                {
-                                    port.DisableAttachTo = true;
-                                }
-
-                            }
-                        }
-                    }
-
-                    //next
-                    if (next == null)
-                    {
-                        if ((port.Orientation == ConnectorOrientation.Left && port2.Orientation == ConnectorOrientation.Right)
-                       || (port.Orientation == ConnectorOrientation.Top && port2.Orientation == ConnectorOrientation.Bottom))
-                        {
-
-                            if (port.Position.DistanceTo(port2.Position) < diagramViewModel.DiagramOption.SnappingOption.SnappingRadius)
-                            {
-                                port.DataItem.ShowConnectors = true;
-                                if (port2.CanAttachTo(port) == true)
-                                {
-                                    port.BeAttachTo = true;
-                                    next = port;
-                                    continue;
-                                }
-                                else
-                                {
-                                    port.DisableAttachTo = true;
-                                }
-
-                            }
-                        }
-                    }
-                }
-            }
-
-            return new Tuple<FullyCreatedConnectorInfo, FullyCreatedConnectorInfo>(parent, next);
-        }
-
-        public static BlockItemsContainerInfo FindNearContainerToAttachTo(this IDiagramViewModel diagramViewModel, BlockDesignerItemViewModel blockDesignerItemViewModel)
-        {
-            if (blockDesignerItemViewModel == null)
-                return null;
-
-            List<BlockDesignerItemViewModel> items;
-
-            items = diagramViewModel.Items.OfType<BlockDesignerItemViewModel>().
-             Where(p => p != blockDesignerItemViewModel)
-             .ToList();
-
-            foreach (var port in items.SelectMany(n => n.Containers))
-            {
-                if (port.GetBounds().IntersectsWith(blockDesignerItemViewModel.GetBounds())) //如果两个位置相交
-                {
-                    var innerport = port.GetAllContainers(port.Children, false).Where(p => p.GetBounds().IntersectsWith(blockDesignerItemViewModel.GetBounds())).OrderByDescending(p => p.ContainerLevel).FirstOrDefault();
-                    if (innerport != null)
-                    {
-                        innerport.DataItem.ShowConnectors = true;
-                        if (innerport.CanAttachTo(blockDesignerItemViewModel) == true)
-                        {
-                            innerport.BeAttachTo = true;
-                        }
-                        else
-                        {
-                            innerport.DisableAttachTo = true;
-                        }
-                        return innerport;
-                    }
-                    else
-                    {
-                        port.DataItem.ShowConnectors = true;
-                        if (port.CanAttachTo(blockDesignerItemViewModel) == true)
-                        {
-                            port.BeAttachTo = true;
-                        }
-                        else
-                        {
-                            port.DisableAttachTo = true;
-                        }
-                        return port;
-                    }
-                }
-            }
-
-            return null;
-        }
-
         /// <summary>
         /// type=0最近且没有依附；=1
         /// </summary>
@@ -252,18 +116,26 @@ namespace AIStudio.Wpf.DiagramDesigner
 
             items = diagramViewModel.Items.OfType<BlockDesignerItemViewModel>().Where(p => !blockDesignerItemTempLink.Items.Contains(p)).ToList();
 
-            foreach (var port in items.SelectMany(n => n.Containers))
+            foreach (var container in items.SelectMany(n => n.Containers))
             {
-                if (port.GetBounds().IntersectsWith(blockDesignerItemTempLink.GetBounds())) //如果两个位置相交
+                if (container.GetBounds().IntersectsWith(blockDesignerItemTempLink.GetBounds())) //如果两个位置相交
                 {
-                    var innerport = port.GetAllContainers(port.Children, false).Where(p => p.GetBounds().IntersectsWith(blockDesignerItemTempLink.GetBounds())).OrderByDescending(p => p.ContainerLevel).FirstOrDefault();
+                    var innerport = container.GetAllContainers(container.Children, false).Where(p => p.GetBounds().IntersectsWith(blockDesignerItemTempLink.GetBounds())).OrderByDescending(p => p.ContainerLevel).FirstOrDefault();
                     if (innerport != null)
                     {
                         innerport.DataItem.ShowConnectors = true;
                         if (innerport.CanAttachTo(blockDesignerItemTempLink.Items.FirstOrDefault()) == true)
                         {
-                            innerport.BeAttachTo = true;
-                            return innerport;
+                            if (innerport.OnlyOneChild)
+                            {
+                                innerport.BeAttachTo = true;
+                                return innerport;
+                            }
+                            else
+                            {
+                                innerport.BeAttachTo = true;
+                                return innerport;
+                            }
                         }
                         //else
                         //{
@@ -274,11 +146,11 @@ namespace AIStudio.Wpf.DiagramDesigner
                     }
                     else
                     {
-                        port.DataItem.ShowConnectors = true;
-                        if (port.CanAttachTo(blockDesignerItemTempLink.Items.FirstOrDefault()) == true)
+                        container.DataItem.ShowConnectors = true;
+                        if (container.CanAttachTo(blockDesignerItemTempLink.Items.FirstOrDefault()) == true)
                         {
-                            port.BeAttachTo = true;
-                            return port;
+                            container.BeAttachTo = true;
+                            return container;
                         }
                         //else
                         //{