最简单的方法是将real属性标记为，[JsonIgnore]并创建一个get- only代理属性：
/// <summary>
/// Gets or sets the country code, and province or state code delimited by a vertical pipe: <c>US|MI</c>
/// </summary>
[JsonIgnore]
public string CountryProvinceState
{
get
{
return string.Format("{0}|{1}", this.CountryCode, this.ProvinceState);
}
set
{
if (!string.IsNullOrWhiteSpace(value) && value.Contains("|"))
{
string[] valueParts = value.Split('|');
if (valueParts.Length == 2)
{
this.CountryCode = valueParts[0];
this.ProvinceState = valueParts[1];
}
}
}
}
[JsonProperty("countryProvinceState")]
string ReadCountryProvinceState
{
get { return CountryProvinceState; }
}
如果需要，代理属性可以是私有的。
如果必须对许多类中的许多属性执行此操作，则创建自己的ContractResolver用于检查自定义属性的属性可能会更容易。如果找到，则该属性将表示该属性为仅获取：
[System.AttributeUsage(System.AttributeTargets.Property, AllowMultiple = false)]
public class GetOnlyJsonPropertyAttribute : Attribute
{
}
public class GetOnlyContractResolver : DefaultContractResolver
{
protected override JsonProperty CreateProperty(MemberInfo member, MemberSerialization memberSerialization)
{
var property = base.CreateProperty(member, memberSerialization);
if (property != null && property.Writable)
{
var attributes = property.AttributeProvider.GetAttributes(typeof(GetOnlyJsonPropertyAttribute), true);
if (attributes != null && attributes.Count > 0)
property.Writable = false;
}
return property;
}
}
然后像这样使用它：
[JsonProperty("countryProvinceState")]
[GetOnlyJsonProperty]
public string CountryProvinceState { get; set; }
然后：
var settings = new JsonSerializerSettings { ContractResolver = new GetOnlyContractResolver() };
var address = JsonConvert.DeserializeObject<Address>(jsonString, settings);
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