SqlServer and MySql

Templates/IEntity.cshtml

@@ -101,10 +101,11 @@ namespace @namespaceObject.Namespace@{<text>.Entity</text>}
 </text>
     }
 
+    public string ProviderName { get; set; }
 
-    public static @sysTableSchemas[0].TableName.StringToProerty()Entity GetInstance()
+    public static @sysTableSchemas[0].TableName.StringToProerty()Entity GetInstance(string providerName)
     {
-        return new @sysTableSchemas[0].TableName.StringToProerty()Entity();
+        return new @sysTableSchemas[0].TableName.StringToProerty()Entity() { ProviderName = providerName };
     }
 
     public virtual void CopyFrom(@sysTableSchemas[0].TableName.StringToProerty()Entity source)
@@ -145,16 +146,71 @@ namespace @namespaceObject.Namespace@{<text>.Entity</text>}
     }
 
     public override string GetSelectFrom()
+    {
+        if (ProviderName.Contains("MySql"))
+        {
+            return GetSelectFromByMySql();
+        }
+        else if (ProviderName.Contains("SqlServer"))
+        {
+            return GetSelectFromByBySqlServer();
+        }
+        else
+        {
+            throw new NotSupportedException($"不支持的数据库提供程序:{ProviderName}");
+        }
+    }
+    public  string GetSelectFromByMySql()
+    {
+        return $" select {DB_NAME_FIELDS} from { DB_NAME_@sysTableSchemas[0].TableName.ToUpper()}  with(nolock) ";
+    }
+    public  string GetSelectFromByBySqlServer()
     {
         return $" select {DB_NAME_FIELDS} from { DB_NAME_@sysTableSchemas[0].TableName.ToUpper()}   ";
     }
 
     public override string GetSelectCountFrom(string sqlWhere)
+    {
+        if (ProviderName.Contains("MySql"))
+        {
+            return GetSelectCountFromByMySql(sqlWhere);
+        }
+        else if (ProviderName.Contains("SqlServer"))
+        {
+            return GetSelectCountFromBySqlServer(sqlWhere);
+        }
+        else
+        {
+            throw new NotSupportedException($"不支持的数据库提供程序:{ProviderName}");
+        }
+    }
+
+    public  string GetSelectCountFromByMySql(string sqlWhere)
     {
         return $" select count(*) from { DB_NAME_@sysTableSchemas[0].TableName.ToUpper()}   where 1=1 {sqlWhere}";
     }
+    public  string GetSelectCountFromBySqlServer(string sqlWhere)
+    {
+        return $" select count(*) from { DB_NAME_@sysTableSchemas[0].TableName.ToUpper()}  with(nolock) where 1=1 {sqlWhere}";
+    }
 
 	public override string GetSelectTopFrom(int limit, int start, string orderby, string orderbytag, string sqlWhere)
+    {
+        if (ProviderName.Contains("MySql"))
+        {
+            return GetSelectTopFromByMySql(limit, start, orderby, orderbytag, sqlWhere);
+        }
+        else if (ProviderName.Contains("SqlServer"))
+        {
+            return GetSelectTopFromBySqlServer(limit, start, orderby, orderbytag, sqlWhere);
+        }
+        else
+        {
+            throw new NotSupportedException($"不支持的数据库提供程序:{ProviderName}");
+        }
+    }
+
+    public  string GetSelectTopFromByMySql(int limit, int start,string orderby,string orderbytag,  string sqlWhere)
     {
             if (string.IsNullOrEmpty(orderbytag)  || orderbytag.Trim() != "desc") orderbytag = "asc";
             @for (var i = 0; i < sysTableSchemas.Length; i++)
@@ -174,6 +230,26 @@ namespace @namespaceObject.Namespace@{<text>.Entity</text>}
         return $" select {DB_NAME_FIELDS} from (select {DB_NAME_FIELDS}  ,row_number() over(order by {orderby} {orderbytag}) as num from { DB_NAME_@sysTableSchemas[0].TableName.ToUpper()}   where 1=1 {sqlWhere} ) a where num> {offset} LIMIT {offset},{limit} ";
     }
 
+    public  string GetSelectTopFromBySqlServer(int limit, int start,string orderby,string orderbytag,  string sqlWhere)
+    {
+            if (string.IsNullOrEmpty(orderbytag)  || orderbytag.Trim() != "desc") orderbytag = "asc";
+            @for (var i = 0; i < sysTableSchemas.Length; i++)
+            {
+            if (@sysTableSchemas[i].Pk > 0)
+                {
+<text>            if (string.IsNullOrEmpty(orderby) || !DB_NAME_FIELDS.Contains(orderby)) orderby =  DB_@sysTableSchemas[i].FieldName.ToUpper() ;  </text>
+                break;
+            }			
+        }
+		
+        @if(sysTableSchemas.Sum(x=>x.Pk)==0)
+        {
+<text>        if (string.IsNullOrEmpty(orderby) || !DB_NAME_FIELDS.Contains(orderby)) orderby =  DB_@sysTableSchemas[0].FieldName.ToUpper() ;  </text>
+        }
+		string top = limit > 0 ? $"top {limit}" : "";
+        return $" select {top} {DB_NAME_FIELDS} from (select {DB_NAME_FIELDS}  ,row_number() over(order by {orderby} {orderbytag}) as num from { DB_NAME_@sysTableSchemas[0].TableName.ToUpper()}  with(nolock) where 1=1 {sqlWhere} ) a where num> {limit * (start - 1)}";
+    }
+
     public @sysTableSchemas[0].TableName.StringToProerty()Entity Clone()
     {
         @sysTableSchemas[0].TableName.StringToProerty()Entity result = new @sysTableSchemas[0].TableName.StringToProerty()Entity();