SqlSugar/Src/Asp.Net/SqlSugar/Utilities/PubMethod.cs

using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Reflection;
using System.Text;
namespace SqlSugar
{
    public class PubMethod
    {
        internal static Type GetUnderType(Type oldType)
        {
            Type type = Nullable.GetUnderlyingType(oldType);
            return type==null ? oldType : type;
        }

        internal static Type GetUnderType(PropertyInfo propertyInfo, ref bool isNullable)
        {
            Type unType = Nullable.GetUnderlyingType(propertyInfo.PropertyType);
            isNullable = unType != null;
            unType = unType ?? propertyInfo.PropertyType;
            return unType;
        }

        internal static Type GetUnderType(PropertyInfo propertyInfo)
        {
            Type unType = Nullable.GetUnderlyingType(propertyInfo.PropertyType);
            unType = unType ?? propertyInfo.PropertyType;
            return unType;
        }

        internal static bool IsNullable(PropertyInfo propertyInfo)
        {
            Type unType = Nullable.GetUnderlyingType(propertyInfo.PropertyType);
            return unType != null;
        }


        internal static T IsNullReturnNew<T>(T returnObj) where T : new()
        {
            if (returnObj.IsNullOrEmpty())
            {
                returnObj = new T();
            }
            return returnObj;
        }

        internal static T ChangeType<T>(T obj, Type type)
        {
            return (T)Convert.ChangeType(obj, type);
        }

        internal static T ChangeType<T>(T obj)
        {
            return (T)Convert.ChangeType(obj, typeof(T));
        }
    }
}