SqlSugar/Src/Asp.Net/SqlSugar/Realization/SqlServer/SqlBuilder/SqlServerExpressionContext.cs

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Linq.Expressions;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;

namespace SqlSugar
{
    public partial class SqlServerExpressionContext : ExpressionContext, ILambdaExpressions
    {
        public SqlSugarProvider Context { get; set; }
        public SqlServerExpressionContext()
        {
            base.DbMehtods = new SqlServerMethod();
        }

    }
    public partial class SqlServerMethod : DefaultDbMethod, IDbMethods
    {
        public override string DateValue(MethodCallExpressionModel model)
        {
            var parameter = model.Args[0];
            var parameter2 = model.Args[1];
            if ((parameter2.MemberValue + "") == "Month")
            {
                if (parameter.MemberName != null && parameter.MemberName is DateTime)
                {
                    return string.Format(" Month('{0}') ", parameter.MemberName);
                }
                else
                {
                    return string.Format(" Month({0}) ", parameter.MemberName);
                }
            }
            else
            {
               return base.DateValue(model);
            }
        }
        public override string HasValue(MethodCallExpressionModel model)
        {
            if (model.Args[0].Type == UtilConstants.GuidType)
            {
                var parameter = model.Args[0];
                return string.Format("( {0} IS NOT NULL )", parameter.MemberName);
            }
            else
            {
                var parameter = model.Args[0];
                return string.Format("( {0}<>'' AND {0} IS NOT NULL )", parameter.MemberName);
            }
        }
    }
}