Question

这是我的天蓝色功能应用程序。

#r "System.Configuration"
#r "System.Data"
using System.Net;
using System.Configuration;
using System.Data.SqlClient;
using System.Threading.Tasks;

public static async Task<HttpResponseMessage> Run(HttpRequestMessage req, 
TraceWriter log)
{       
    int num;    
    string query = req.GetQueryNameValuePairs()
        .FirstOrDefault(q => string.Compare(q.Key, "num", true) == 0)
        .Value;    

    if (query == null)
    {
        // Get request body
        dynamic data = await req.Content.ReadAsAsync<object>();
        num = data.num;
    }
    else {
        num = Convert.ToInt32(query);
    }      

    int[] numRead = new int[3];
    string[] nameRead = new string[3];    

    var str = 
ConfigurationManager.ConnectionStrings["sqldb_connection"].ConnectionString;

    using (SqlConnection conn = new SqlConnection(str))
    {
        conn.Open();
        var text = "select num,name from bus where num=@num;";

        using (SqlCommand cmd = new SqlCommand(text, conn))
        {
            cmd.Parameters.AddWithValue("@num", num);
            using (SqlDataReader reader = cmd.ExecuteReader()) 
            {
                int i = 0;
                while (reader.Read())
                {
                    numRead[i] = reader.GetInt32(0);                    
                    nameRead[i++] = reader.GetString(1);
                    Console.WriteLine(numRead[i] + ":" + nameRead[i]);                    
                }
            }
        }        
    }
    return req.CreateResponse(HttpStatusCode.OK, new {            
        name = nameRead[0],
        num = numRead[0]           
    });    
}

我希望函数像这样返回多个json

return req.CreateResponse(HttpStatusCode.OK, new {
        "item1" : {
            name = nameRead[0],
            num = numRead[0]
        },
        "item2" : {
            name = nameRead[1],
            num = numRead[1]
        },
        "item3" : {
            name = nameRead[2],
            num = numRead[2]
        }
    });

但它没有用。

C＃有JsonArray，JsonObject或JsonValue课程，但我不了解如何使用它们，也不知道它们之间的区别。

Answer 1

如果你使它有效C＃：

，它应该有用

return req.CreateResponse(HttpStatusCode.OK, new {
    item1 = new {
        name = nameRead[0],
        num = numRead[0]
    },
    item2 = new {
        name = nameRead[1],
        num = numRead[1]
    },
    item3 = new {
        name = nameRead[2],
        num = numRead[2]
    }
});

Answer 2

您只需返回一个实例数组，框架将负责转换为JSON。

首先，您创建一个类来保存您的项目：

public class Result
{
   public string Name {get; set;}
   public int Num {get; set;}
}

现在你只返回一些数组：

return req.CreateResponse(HttpStatusCode.OK, new Result[] {
        new Result() {
            Name = nameRead[0],
            Num = numRead[0]
        },
        new Result() {
            Name = nameRead[1],
            Num = numRead[1]
        },
        new Result() {
            Name = nameRead[2],
            Num = numRead[2]
        }
    });

如果您想要更好地控制数据的返回方式，请检查Newtonsoft.JSON库，它实际上是C＃中的默认库，并提供您提到的所有类。它的文档非常好，有很多例子，所以你应该能够在那里找到你需要的东西。

Azure Function返回多个JSON对象

2 个答案: