CostCalculationItem/IRaCIS.Core.API/Utility/NullToEmptyStringValueProvider.cs

using System;
using System.Reflection;
using Newtonsoft.Json.Serialization;

namespace IRaCIS.Core.API
{
    //public class NullToEmptyStringValueProvider : IValueProvider
    //{
    //    private readonly JsonProperty _memberInfo;

    //    /// <summary>
    //    /// 构造函数
    //    /// </summary>
    //    /// <param name="memberInfo"></param>
    //    public NullToEmptyStringValueProvider(JsonProperty memberInfo)
    //    {
    //        _memberInfo = memberInfo;
    //    }

    //    /// <summary>
    //    /// 获取Value
    //    /// </summary>
    //    public object GetValue(object target)
    //    {
    //        var result = _memberInfo.DefaultValue;
    //        if (_memberInfo.PropertyType == typeof(string) && result == null)
    //        {
    //            result = string.Empty;
    //        }
    //        else if (_memberInfo.PropertyType == typeof(double?) && result == null)
    //        {
    //            result = 0;
    //        }
    //        else if (_memberInfo.PropertyType == typeof(double?) && result == null)
    //        {
    //            result = 0;
    //        }

    //        return result;
    //    }

    //    /// <summary>
    //    /// 设置Value
    //    /// </summary>
    //    public void SetValue(object target, object value)
    //    {
    //        //_memberInfo.SetValue(target, value);
    //        _memberInfo.DefaultValue = value;
    //    }
    //}

    public class NullToEmptyStringValueProvider : Newtonsoft.Json.Serialization.IValueProvider
    {
        PropertyInfo _MemberInfo;
        public NullToEmptyStringValueProvider(PropertyInfo memberInfo)
        {
            _MemberInfo = memberInfo;
        }
        public object GetValue(object target)
        {
            object result = _MemberInfo.GetValue(target);
            if (_MemberInfo.PropertyType == typeof(string) && result == null) result = "";
            else if (_MemberInfo.PropertyType == typeof(String[]) && result == null) result = new string[] { };
            else if (_MemberInfo.PropertyType == typeof(Nullable<Int32>) && result == null) result = 0;
            else if (_MemberInfo.PropertyType == typeof(Nullable<Decimal>) && result == null) result = 0.00M;
          
            return result;
        }
        public void SetValue(object target, object value)
        {
            _MemberInfo.SetValue(target, value);
        }
    }

}