53 lines
1.5 KiB
C#
53 lines
1.5 KiB
C#
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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using System.Text;
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using System.Threading.Tasks;
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namespace LiveForum.Code.JsonConverterExtend;
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public class NullToEmptyStringContractResolver : CamelCasePropertyNamesContractResolver
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{
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protected override IValueProvider CreateMemberValueProvider(MemberInfo member)
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{
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var valueProvider = base.CreateMemberValueProvider(member);
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// 处理字符串属性（包括可空字符串）
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if (member is PropertyInfo property &&
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(property.PropertyType == typeof(string) ||
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(property.PropertyType.IsGenericType &&
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property.PropertyType.GetGenericTypeDefinition() == typeof(Nullable<>) &&
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property.PropertyType.GetGenericArguments()[0] == typeof(string))))
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{
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return new StringValueProvider(valueProvider);
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}
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return valueProvider;
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}
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private class StringValueProvider : IValueProvider
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{
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private readonly IValueProvider _innerProvider;
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public StringValueProvider(IValueProvider innerProvider)
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{
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_innerProvider = innerProvider;
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}
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public void SetValue(object target, object value)
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{
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_innerProvider.SetValue(target, value);
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}
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public object GetValue(object target)
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{
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var value = _innerProvider.GetValue(target);
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return value ?? string.Empty;
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}
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}
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}
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