Delete nav

Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/DeleteNavManyToMany.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SqlSugar 
+{
+    public partial class DeleteNavProvider<Root, T> where T : class, new() where Root : class, new()
+    {
+        private void DeleteManyToMany<TChild>(string name, EntityColumnInfo nav) where TChild : class, new()
+        {
+
+        }
+
+    }
+}

Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/DeleteNavOneToMany.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SqlSugar 
+{
+    public partial class DeleteNavProvider<Root, T> where T : class, new() where Root : class, new()
+    {
+
+
+        private void DeleteOneToMany<TChild>(string name, EntityColumnInfo nav) where TChild : class, new()
+        {
+            throw new NotImplementedException();
+        }
+
+    }
+}

Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/DeleteNavOneToOne.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SqlSugar 
+{
+    public partial class DeleteNavProvider<Root, T> where T : class, new() where Root : class, new()
+    {
+        private void DeleteOneToOne<TChild>(string name, EntityColumnInfo nav) where TChild : class, new()
+        {
+             
+        }
+
+    }
+}

Src/Asp.Net/SqlSugar/Abstract/ExecuteNavProvider/DeleteNavProvider.cs

@@ -7,15 +7,39 @@ using System.Threading.Tasks;
 
 namespace SqlSugar 
 {
-    public class DeleteNavProvider<Root, T> where T : class, new() where Root : class, new()
+    public partial class DeleteNavProvider<Root, T> where T : class, new() where Root : class, new()
     {
-        public SqlSugarProvider _Context { get; internal set; }
+        public List<Root> _Roots { get; set; }
+        public List<object> _ParentList { get; set; }
+        public List<object> _RootList { get; set; }
+        public EntityInfo _ParentEntity { get; set; }
+        public EntityColumnInfo _ParentPkColumn { get; set; }
+        public SqlSugarProvider _Context { get; set; }
 
         public DeleteNavTask<Root, TChild> ThenInclude< TChild>(Expression<Func<Root, TChild>> expression)
             where TChild : class, new()
         {
-            throw new NotImplementedException();
+            var name = ExpressionTool.GetMemberName(expression);
+            var nav = this._ParentEntity.Columns.FirstOrDefault(x => x.PropertyName == name);
+            if (nav.Navigat == null)
+            {
+                Check.ExceptionEasy($"{name} no navigate attribute", $"{this._ParentEntity.EntityName}的属性{name}没有导航属性");
             }
+            if (nav.Navigat.NavigatType == NavigateType.OneToOne || nav.Navigat.NavigatType == NavigateType.ManyToOne)
+            {
+                DeleteOneToOne<TChild>(name, nav);
+            }
+            else if (nav.Navigat.NavigatType == NavigateType.OneToMany)
+            {
+                DeleteOneToMany<TChild>(name, nav);
+            }
+            else
+            {
+                DeleteManyToMany<TChild>(name, nav);
+            }
+            return null;
+        }
+
         public DeleteNavTask<Root, TChild> ThenInclude<TChild>(Expression<Func<Root, List<TChild>>> expression)
          where TChild : class, new()
         {

Src/Asp.Net/SqlSugar/SqlSugar.csproj

@@ -89,6 +89,9 @@
     <Compile Include="Abstract\DeleteProvider\SplitTableDeleteByObjectProvider.cs" />
     <Compile Include="Abstract\DeleteProvider\SplitTableDeleteProvider.cs" />
     <Compile Include="Abstract\EntityMaintenance\EntityMaintenance.cs" />
+    <Compile Include="Abstract\ExecuteNavProvider\DeleteNavManyToMany.cs" />
+    <Compile Include="Abstract\ExecuteNavProvider\DeleteNavOneToMany.cs" />
+    <Compile Include="Abstract\ExecuteNavProvider\DeleteNavOneToOne.cs" />
     <Compile Include="Abstract\ExecuteNavProvider\DeleteNavProvider.cs" />
     <Compile Include="Abstract\ExecuteNavProvider\InsertNavProviderHelper.cs" />
     <Compile Include="Abstract\ExecuteNavProvider\InsertNavProviderOneToMany.cs" />