Question

我想创建一个像这样的json：

{＆＃39; sr_no＆＃39;：＆＃39; OH009876673＆＃39;＆＃39;数据＆＃39;：[{＆＃39;代码＆＃39;：＆＃39; 0124＆＃39; ＆＃39; findex＆＃39;：＆＃39; 3＆＃39;}，{＆＃39;代码＆＃39;：＆＃39; 0126＆＃39;＆＃39; findex＆＃39;：＆＃ 39; 5＆＃39;}，{＆＃39;代码＆＃39;：＆＃39; 0125＆＃39;＆＃39; findex＆＃39;：＆＃39; 8＆＃39;}]}

我正在尝试这样做但是得到了错误，因为我使用postData作为dictinory

码

var data = new Dictionary<int, string>();
JavaScriptSerializer jss = new JavaScriptSerializer();
axCZKEM1.EnableDevice(iMachineNumber, false);
Cursor = Cursors.WaitCursor;
axCZKEM1.ReadAllUserID(iMachineNumber);//read all the user information to the memory
axCZKEM1.ReadAllTemplate(iMachineNumber);//read all the users' fingerprint templates to the memory
while (axCZKEM1.SSR_GetAllUserInfo(iMachineNumber, out sdwEnrollNumber, out sName, out sPassword, out iPrivilege, out bEnabled))//get all the users' information from the memory
{
    for (idwFingerIndex = 0,i=0; idwFingerIndex < 10; idwFingerIndex++,i++)
    {
        if (axCZKEM1.GetUserTmpExStr(iMachineNumber, sdwEnrollNumber, idwFingerIndex, out iFlag, out sTmpData, out iTmpLength))//get the corresponding templates string and length from the memory
        {

            var obj = new Dictionary<string, string>();
            obj["code"] = sdwEnrollNumber;
            obj["findex"] = idwFingerIndex.ToString();
            data[i] = jss.Serialize(obj);
            i++;
        }
    }
}

axCZKEM1.EnableDevice(iMachineNumber, true);

var client = new RestClient();
client.EndPoint = @"";
var postData = new Dictionary<string, string>();
postData["sr_no"] = sr_no;
postData["data"] = data;  // error on this line because data is array and trying to assign to string

如何解决这个问题，因为我想要JSON中的对象数组来请求API。

Answer 1

您可以使用NewtonSoft.Json序列化对象。由于您已经有预期的json数据样本，因此可以在http://json2csharp.com/

上生成c＃类

public class Datum
{
    public string code { get; set; }
    public string findex { get; set; }
}

public class RootObject
{
    public string sr_no { get; set; }
    public List<Datum> data { get; set; }
}

在代码中使用该类，而不是创建Dictionary

RootObject obj = new RootObject();
obj.sr_no = "OH009876673";
obj.data = new List<Datum>();
......
......
while (axCZKEM1.SSR_GetAllUserInfo(iMachineNumber, out sdwEnrollNumber, out sName, out sPassword, out iPrivilege, out bEnabled))//get all the users' information from the memory
{
    for (idwFingerIndex = 0,i=0; idwFingerIndex < 10; idwFingerIndex++,i++)
    {
        if (axCZKEM1.GetUserTmpExStr(iMachineNumber, sdwEnrollNumber, idwFingerIndex, out iFlag, out sTmpData, out iTmpLength))//get the corresponding templates string and length from the memory
        {

            //var obj = new Dictionary<string, string>();
            //obj["code"] = sdwEnrollNumber;
            //obj["findex"] = idwFingerIndex.ToString();
            //data[i] = jss.Serialize(obj);
            //i++;
            obj.data.Add( new Datum() {code = sdwEnrollNumber, findex = idwFingerIndex.ToString()});
        }
    }
}

axCZKEM1.EnableDevice(iMachineNumber, true);

var client = new RestClient();
client.EndPoint = @"";

var outputJson = JsonConvert.SerializeObject(obj);

Answer 2

试试这个：

            var sr_no = "";
            var data =new List<Data>();
            JavaScriptSerializer jss = new JavaScriptSerializer();
            axCZKEM1.EnableDevice(iMachineNumber, false);
            Cursor = Cursors.WaitCursor;
            axCZKEM1.ReadAllUserID(iMachineNumber);//read all the user information to the memory
            axCZKEM1.ReadAllTemplate(iMachineNumber);//read all the users' fingerprint templates to the memory
            while (axCZKEM1.SSR_GetAllUserInfo(iMachineNumber, out sdwEnrollNumber, out sName, out sPassword, out iPrivilege, out bEnabled))//get all the users' information from the memory
            {
                for (idwFingerIndex = 0, i = 0; idwFingerIndex < 10; idwFingerIndex++, i++)
                {
                    if (axCZKEM1.GetUserTmpExStr(iMachineNumber, sdwEnrollNumber, idwFingerIndex, out iFlag, out sTmpData, out iTmpLength))//get the corresponding templates string and length from the memory
                    {

                        data.Add(new Data { code = sdwEnrollNumber, findex = idwFingerIndex.ToString() });
                        i++;
                    }
                }
            }

            var postObject = new RootObject
            {
                sr_no = sr_no,
                data = data
            };
            var postData = jss.Serialize(postObject);

public class Data
{
    public string code { get; set; }
    public string findex { get; set; }
}

public class RootObject
{
    public string sr_no { get; set; }
    public List<Data> data { get; set; }
}

我还建议使用newtonsoft代替JavaScriptSerializer。

在c＃中构造一个JSON对象？

2 个答案: