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从JSON中移除具有空字符串值的属性

json c#

Waleed Naveed · 技术社区 · 6 年前

我有以下JSON,其中一些属性有空字符串,即“”或空值

{  
   "allOrNone":false,
   "records":[  
  {  
     "Address__c":"Street",
     "ConsentToComm__c":"",
     "EmailCLDate__c":"",
     "attributes":{  
        "type":"Stage_FF_Hot_Alerts__c"
     }
  }
 ]
}

我必须从这个JSON中删除空字符串和空值属性。我怎样才能把它们移走呢?我在C做这个。删除空字符串后所需的json,空值为:

{  
   "allOrNone":false,
   "records":[  
  {  
     "Address__c":"Street",
     "attributes":{  
        "type":"Stage_FF_Hot_Alerts__c"
     }
  }
 ]
}

2 回复 | 直到 6 年前

Waleed Naveed 6 年前

我已经解决了这个问题。在序列化过程中,我删除了空值。

string JSONstring = JsonConvert.SerializeObject(dt, new 
JsonSerializerSettings()
{
            NullValueHandling = NullValueHandling.Ignore,
});

然后通过以下代码删除空字符串值

var temp = JArray.Parse(JSONstring);
temp.Descendants()
    .OfType<JProperty>()
    .Where(attr => attr.Value.ToString() == "")
    .ToList() // you should call ToList because you're about to changing the result, which is not possible if it is IEnumerable
    .ForEach(attr => attr.Remove()); // removing unwanted attributes

JSONstring = temp.ToString();

luis 6 年前

这可能有帮助

namespace JSON
{
    using System;
    using System.Collections.Generic;

    using System.Globalization;
    using Newtonsoft.Json;
    using Newtonsoft.Json.Converters;

    public partial class Root
    {
        [DefaultValue("")]
        [JsonProperty("allOrNone")]
        public bool AllOrNone { get; set; }

        [DefaultValue("")]
        [JsonProperty("records")]
        public Record[] Records { get; set; }
    }

    public partial class Record
    {
        [DefaultValue("")]
        [JsonProperty("Address__c")]
        public string AddressC { get; set; }

        [DefaultValue("")]
        [JsonProperty("ConsentToComm__c")]
        public string ConsentToCommC { get; set; }

        [DefaultValue("")]
        [JsonProperty("EmailCLDate__c")]
        public string EmailClDateC { get; set; }

        [DefaultValue("")]
        [JsonProperty("attributes")]
        public Attributes Attributes { get; set; }
    }

    public partial class Attributes
    {
        [DefaultValue("")]
        [JsonProperty("type")]
        public string Type { get; set; }
    }

    public partial class Root
    {
        public static Root FromJson(string json) => JsonConvert.DeserializeObject<Root>(json, QuickType.Converter.Settings);
    }

    public static class Serialize
    {
        public static string ToJson(this Root self) => JsonConvert.SerializeObject(self, QuickType.Converter.Settings);
    }

    internal static class Converter
    {
        public static readonly JsonSerializerSettings Settings = new JsonSerializerSettings
        {
            NullValueHandling = NullValueHandling.Ignore,
            ContractResolver = ShouldSerializeContractResolver.Instance,
            MetadataPropertyHandling = MetadataPropertyHandling.Ignore,
            DateParseHandling = DateParseHandling.None,
            Converters = {
                new IsoDateTimeConverter { DateTimeStyles = DateTimeStyles.AssumeUniversal }
            },
        };
    }
}