*增加TDSQLForPGODBC的支持

Src/Asp.NetCore2/SqlSugar.TDSQLForPGODBC/Tools/UtilExtensions.cs

@@ -0,0 +1,37 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+namespace SqlSugar.TDSQLForPGODBC
+{
+    /// <summary>
+    ///Common Extensions for external users
+    /// </summary>
+    public static class UtilExtensions
+    {
+        public static string ToLower(this string value, bool isLower) 
+        {
+            if (isLower) 
+            {
+                return value.ObjToString().ToLower();
+            }
+            return value.ObjToString();
+        }
+        public static string ToUpper(this string value, bool isAutoToUpper)
+        {
+            if (value == null) return null;
+            if (isAutoToUpper == false) return value;
+            return value.ToUpper();
+        }
+
+        public static string GetN(this SqlSugarProvider Context) 
+        {
+            var N = "N";
+            if (Context.CurrentConnectionConfig.MoreSettings != null && Context.CurrentConnectionConfig.MoreSettings.DisableNvarchar)
+            {
+                N = "";
+            }
+            return N;
+        }
+    }
+}