C#解析Json值中含数组

可以使用开源的类库Newtonsoft.Json。

例如解析如下

string json =
{
"result": "ok", // ret 值为 ok 时 返回 data 数据 为err时返回msg数据
"data": [
"ava", /
"ben",
"ccc",
"ddd",
]
};

函数如下

public string cutJson(string json,string item,int index)
{
JObject jo = (JObject)JsonConvert.DeserializeObject(json);
string value = jo[item][index].ToString();
return value;
}

其中item表示为Json中的key(名称), index表示某个item对应的value(值对)中的特定项

拓展：

Api接口接受Post过来的查询条件并返回数据

Post查询条件 （用Postman放在Body里调试）

{
"PN": "ABCDEFGHIJ-00",
"cuPNList": [
{
"cuPN": "9A200000000000000"
} ,
{
"cuPN": "900000000030000"
}
]
}

Api接口

[HttpGet]
[Route("api/GetLotCardMIMAFInfo")]
public HttpResponseMessage GetLotCardMIMAFInfo()
{
var data = Request.Content.ReadAsStringAsync().Result; 
var PNlist = "";
JObject jsonObj = JObject.Parse(data);
string PNno = jsonObj["PN"].ToString();

JArray jsonAry = JArray.Parse(jsonObj["cuPNList"].ToString());
JObject stu1Obj = JObject.Parse(jsonAry[0].ToString());
string cuPN = stu1Obj["cuPN"].ToString();
foreach (var ss in jsonAry) //查找某个字段与值
{
PNlist = PNlist + ss["cuPN"].ToString() + ","; // ((JObject)ss)["cuPN"]; // JObject.Parse(jsonAry[0].ToString());
} 
JsonData jd = new JsonData();
//JavaScriptSerializer js = new JavaScriptSerializer();
//var resultqq = JsonConvert.DeserializeObject<List<PNitem>>(cuPNList);
//List<PNitem> lst = js.Deserialize<List<PNitem>>(cuPNList);
//var PNlist = "";
//for (int i = 0; i < lst.Count; i++)
//{
// PNlist = PNlist + lst[i].cuPN +",";
//} 
DataTable dt = checkInplanservice.GettLotCardInfoTable(PNno);
DataTable dtMAF = checkInplanservice.GettLotCardMAFInfoTable(PNlist);
//OBJ转化成JSON
jd.Status = HandleStatus.Success;
jd.Data = new
{
cuLayerType = dt.Rows[0]["LayerLevel"],
cuCustomer = dt.Rows[0]["MiCustPn"],
cuCustomerName = dt.Rows[0]["MiCustName"],
cuQRCustomerPN = "",
cuQRCustomerPNVersion = "",
cuPNLOrigin = dt.Rows[0]["lvdr"],
cuSize = dt.Rows[0]["Value"],
cuCurrSize = dt.Rows[0]["MiSetArea"],
cuHSFRequirement = dt.Rows[0]["AttrCode"],
cuPNList = dtMAF,
test= new[] {new {Name ="Tom",Age=30},
new {Name ="Lily", Age=22}}
};
string msgAll = JsonConvert.SerializeObject(jd);
return JsonResult(msgAll);


//string json = JsonConvert.SerializeObject(dt); 
////返回json数
//return new HttpResponseMessage()
//{
// Content = new StringContent(json, Encoding.UTF8, "application/json"),
//};

}