86 lines
2.8 KiB
C#
86 lines
2.8 KiB
C#
using IRaCIS.Core.Infrastructure.NewtonsoftJson;
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using Newtonsoft.Json;
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using Newtonsoft.Json.Serialization;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Reflection;
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namespace IRaCIS.Core.API
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{
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/// <summary>
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/// LowerCamelCaseJsonAttribute 可以设置类小写返回给前端
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/// </summary>
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public class NullToEmptyStringResolver : DefaultContractResolver
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{
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protected override IList<JsonProperty> CreateProperties(Type type, MemberSerialization memberSerialization)
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{
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// 检查类是否有 LowerCamelCaseJsonAttribute 标记 有的话，属性名小写
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if (type.GetCustomAttribute<LowerCamelCaseJsonAttribute>() != null)
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{
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base.NamingStrategy = new LowerCamelCaseNamingStrategy();
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}
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else
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{
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base.NamingStrategy = null;
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}
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IList<JsonProperty> properties = base.CreateProperties(type, memberSerialization);
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var list = type.GetProperties()
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.Select(p =>
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{
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var jp = base.CreateProperty(p, memberSerialization);
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jp.ValueProvider = new NullToEmptyStringValueProvider(p);
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return jp;
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}).ToList();
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var uu = list.Select(t => t.PropertyName).ToList();
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//获取复杂对象属性
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properties = properties.TakeWhile(t => !uu.Contains(t.PropertyName)).ToList();
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list.AddRange(properties);
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return list;
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}
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}
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public class NullToEmptyStringValueProvider : IValueProvider
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{
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PropertyInfo _MemberInfo;
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public NullToEmptyStringValueProvider(PropertyInfo memberInfo)
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{
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_MemberInfo = memberInfo;
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}
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public object GetValue(object target)
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{
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object result = _MemberInfo.GetValue(target);
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if (_MemberInfo.PropertyType == typeof(string) && result == null) result = "";
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else if (_MemberInfo.PropertyType == typeof(String[]) && result == null) result = new string[] { };
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//else if (_MemberInfo.PropertyType == typeof(Nullable<Int32>) && result == null) result = 0;
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//else if (_MemberInfo.PropertyType == typeof(Nullable<Decimal>) && result == null) result = 0.00M;
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return result;
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}
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public void SetValue(object target, object value)
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{
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if (_MemberInfo.PropertyType == typeof(string))
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{
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//去掉前后空格
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_MemberInfo.SetValue(target, value == null ? string.Empty : value.ToString() == string.Empty ? value : value/*.ToString().Trim()*/);
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}
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else
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{
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_MemberInfo.SetValue(target, value);
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}
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}
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}
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}
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