Update .net core project

Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/Common/ErrorMessage.cs

@@ -34,7 +34,7 @@ namespace SqlSugar
         {
             get
             {
-                return ErrorMessage.GetThrowMessage("Connection open error . {0}", " 连接数据库过程中发生错误，检查服务器是否正常连接字符串是否正确，实在找不到原因请先Google错误信息：{0}.");
+                return ErrorMessage.GetThrowMessage("Connection open error . {0}", " 连接数据库过程中发生错误，检查服务器是否正常连接字符串是否正确，错误信息：{0}.");
             }
         }
         public static string ExpressionCheck

Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/ResolveItems/OneToManyNavgateExpression.cs

@@ -117,7 +117,15 @@ namespace SqlSugar
             {
                 return GetOneToManySql();
             }
-            else 
+            else if (Navigat.NavigatType == NavigateType.Dynamic) 
+            {
+                Check.ExceptionEasy(
+                   true,
+                   " NavigateType.Dynamic no support expression .  " + this.ProPertyEntity.Type.Name,
+                   " NavigateType.Dynamic 自定义导航对象不支持在Where(x=>x.自定义.Id==1)等方法中使用" + this.ProPertyEntity.Type.Name);
+                return null;
+            }
+            else
             {
                 return GetManyToManySql();
             }

Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/ResolveItems/OneToOneNavgateExpression.cs

@@ -70,6 +70,13 @@ namespace SqlSugar
             {
                 Check.ExceptionEasy(true, " expression error ", "导航查询出错，比如.Count要改成 .Count()");
             }
+            else if (Navigat.NavigatType == NavigateType.Dynamic)
+            {
+                Check.ExceptionEasy(
+                    true,
+                    " NavigateType.Dynamic no support expression .  "+ this.ProPertyEntity.Type.Name,
+                    " NavigateType.Dynamic 自定义导航对象不支持在Where(x=>x.自定义.Id==1)等方法中使用"+ this.ProPertyEntity.Type.Name);
+            }
             var pk = this.ProPertyEntity.Columns.First(it => it.IsPrimarykey == true).DbColumnName;
             var name = this.EntityInfo.Columns.First(it => it.PropertyName == Navigat.Name).DbColumnName;
             var selectName = this.ProPertyEntity.Columns.First(it => it.PropertyName ==MemberName).DbColumnName;

Src/Asp.NetCore2/SqlSugar/Realization/MySql/MySqlProvider.cs

@@ -20,6 +20,7 @@ namespace SqlSugar
                     try
                     {
                         var mySqlConnectionString = base.Context.CurrentConnectionConfig.ConnectionString;
+                        Check.ExceptionEasy(String.IsNullOrEmpty(mySqlConnectionString), "ConnectionString is not null", "连接字符串ConnectionString不能为Null");
                         if (!mySqlConnectionString.ToLower().Contains("charset")&& !mySqlConnectionString.ToLower().Contains("character"))
                         {
                             mySqlConnectionString = mySqlConnectionString.Trim().TrimEnd(';') + ";charset=utf8;";
@@ -28,7 +29,14 @@ namespace SqlSugar
                     }
                     catch (Exception ex)
                     {
-                        Check.Exception(true, ErrorMessage.ConnnectionOpen, ex.Message);
+                        if (ex is SqlSugarException)
+                        {
+                            throw ex;
+                        }
+                        else
+                        {
+                            Check.Exception(true, ErrorMessage.ConnnectionOpen, ex.Message);
+                        }
                     }
                 }
                 return base._DbConnection;