在C#中怎么解析JSON数据，并获取到其中的值？
在C#中怎么解析JSON数据，并获取到其中的值？
比如JSON数据为：{"phantom":true,"id":"ext-record-10","data":{"MID":1019,"Name":"aaccccc","Des":"cc","Disable":"启用","Remark":"cccc"}}。
我想得到结果为{"MID":1019,"Name":"aaccccc","Des":"cc","Disable":"启用","Remark":"cccc"}的字符串。
[解决办法]
下面的内容没有验证过，仅供参考

I don't know about JSON.NET, but it works fine with JavaScriptSerializer from System.Web.Extensions.dll (.NET 3.5 SP1):

using System.Collections.Generic;
using System.Web.Script.Serialization;
public class NameTypePair
{
public string OBJECT_NAME { get; set; }
public string OBJECT_TYPE { get; set; }
}
public enum PositionType { none, point }
public class Ref
{
public int id { get; set; }
}
public class SubObject
{
public NameTypePair attributes { get; set; }
public Position position { get; set; }
}
public class Position
{
public int x { get; set; }
public int y { get; set; }
}
public class Foo
{
public Foo() { objects = new List<SubObject>(); }
public string displayFieldName { get; set; }
public NameTypePair fieldAliases { get; set; }
public PositionType positionType { get; set; }
public Ref reference { get; set; }
public List<SubObject> objects { get; set; }
}
static class Program
{

const string json = @"{
""displayFieldName"" : ""OBJECT_NAME"",
""fieldAliases"" : {
""OBJECT_NAME"" : ""OBJECT_NAME"",
""OBJECT_TYPE"" : ""OBJECT_TYPE""
},
""positionType"" : ""point"",
""reference"" : {
""id"" : 1111
},
""objects"" : [
{
""attributes"" : {
""OBJECT_NAME"" : ""test name"",
""OBJECT_TYPE"" : ""test type""
},
""position"" :
{
""x"" : 5,
""y"" : 7
}
}

]
}";


static void Main()
{
JavaScriptSerializer ser = new JavaScriptSerializer();
Foo foo = ser.Deserialize<Foo>(json);
}


}

[解决办法]
该回复于2012-12-20 09:37:42被管理员删除
[解决办法]
新版，需要引用System.ServiceModel.Web.dll

using System.Runtime.Serialization.Json;
       [Serializable]
        public class InternalClass
        {
            public int MID;
            public string Name;
            public string Des;
            public string Disable;
            public string Remark;
        }

        [Serializable]
        public class OuterClass
        {
            public bool phantom;
            public string id;

            public InternalClass data;
        }

        private void button2_Click(object sender, EventArgs e)
        {
            const string json = @"{""phantom"":true,
                                   ""id"":""ext-record-10"",
                                   ""data"":
                                  {""MID"":1019,
                                   ""Name"":""aaccccc"",
                                    ""Des"":""cc"",
                                    ""Disable"":""启用"", 
 
                                    ""Remark"":""cccc""}}";
            DataContractJsonSerializer ser1 = new DataContractJsonSerializer(typeof(OuterClass));
            using (MemoryStream ms = new MemoryStream(Encoding.Unicode.GetBytes(json)))
            {
                OuterClass foo1 = ser1.ReadObject(ms) as OuterClass;
            }

        }

[解决办法]
这个也结了吧:)

可以使用serialization得到，但是我觉得那最好还是用字符串函数来做性能好一点 serialization和desiralization比较慢。

const string json = @"{""phantom"":true,
""id"":""ext-record-10"",
""data"":
{""MID"":1019,
""Name"":""aaccccc"",
""Des"":""cc"",
""Disable"":""启用"",
""Remark"":""cccc""}}";

int posBegin = json.IndexOf(’{', 0);
posBegin = json.Indexof('{', posBegin);
int posEnd = json.IndexOf('}', posBegin);
string substr = json.SubString(posBegin, posEnd - posBegin +1);

代码没有经过测试，可能有小问题，仅供参考。