使用 C#/VB.Net 将数据集设为 JSON

Question

我有一个包含以下数据的数据集：

我想将此数据转换为 JSON，格式如下：

{
    "Resource": [
        {
            "resourceID": "1",
            "resourceName": "Jonathan",
            "Customer": [
                {
                    "customerID": "1",
                    "firstName": "Alec",
                    "lastName": "Stewart",
                    "Appointments": [
                        {
                            "appointmentID": "1",
                            "startDate": "01-01-2015",
                            "endDate": "01-01-2015"
                        },
                        {
                            "appointmentID": "2",
                            "startDate": "01-01-2015",
                            "endDate":"01-01-2015",
                        }
                    ]
                },
                {
                    "customerID": "2",
                    "firstName": "Chris",
                    "lastName": "Douglas",
                    "Appointments": [
                        {
                            "appointmentID": "3",
                            "startDate": "01-01-2015",
                            "endDate": "01-01-2015",
                        }
                    ]
                }
            ]
        },
        {
            "resourceID": "2",
            "resourceName": "Matthew",
            "Customer": [
                {
                    "customerID": "3",
                    "firstName": "Shirley",
                    "lastName": "Graham",
                    "Appointments": [
                        {
                            "appointmentID": "4",
                            "startDate": "01-01-2015",
                            "endDate": "01-01-2015",
                        },
                        {
                            "appointmentID": "5",
                            "startDate": "01-01-2015",
                            "endDate": "01-01-2015"
                        }
                    ]
                },
                {
                    "customerID": "4",
                    "firstName": "Ricardo",
                    "lastName": "Powell",
                    "Appointments": [
                        {
                            "appointmentID": "6",
                            "startDate": "01-01-2015",
                            "endDate": "01-01-2015"
                        }
                    ]
                }
            ]
        }
    ]
}

我可以在 VB.Net 中使用任何更快的方法将其直接转换为 JSON 吗？我应该创建类并列出和迭代数据集以创建嵌套类的对象然后序列化它还是可以通过不同的方式实现？有人可以告诉我将数据集序列化为 JSON 的方法吗？我也可以使用 C#。

Answer 1

用于 .NET <> JSON Newtonsofts JSON http://www.newtonsoft.com/json。它可以满足您的一切需求！

Answer 2

如前所述，newtonsoft是真正的美女。你可以这样做：

string json = JsonConvert.SerializeObject(yourdataset, Formatting.Indented);

Answer 3

如前所述，您可以为此使用 NewtonSoft。但是没有默认行为。要创建更通用的解决方案，您可以为 Newtonsoft 编写自定义 JsonConverter。并为您的项目实现一种干净的方式来序列化或反序列化。

查看示例：http://blog.maskalik.com/asp-net/json-net-implement-custom-serialization/ or http://www.newtonsoft.com/json/help/html/CustomJsonConverter.htm。

Answer 4

您需要像下面这样嵌套 class：

[Serializable]
public class Resource
{
    public string resourceID { get; set; }
    public string resourceName { get; set; }
    public List<Customer> Customers { get; set; }
}

public class Customer
{
    public string customerID { get; set; }
    public string firstName { get; set; }
    public string lastName { get; set; }
    public List<Appointment> Appointments { get; set; }
}

public class Appointment
{
    public string appointmentID { get; set; }
    public string startDate { get; set; }
    public string endDate { get; set; }
}

在 class 中填充数据后，您可以使用 JavaScriptSerializer class，它已经是 System.Web.Script.Serialization 的一部分，如下所示：

var resources = new List<Resource>();
//populate resources data here

JavaScriptSerializer serializer = new JavaScriptSerializer();
serializer.MaxJsonLength = Int32.MaxValue;
var resourceJSON = serializer.Serialize(resources); //result

//您可以使用以下代码填充资源 class：

// Fill the DataSet
DataSet dataSet = new DataSet("tblResources");
adapter.Fill(dataSet);

//Populate nested class base on DataSet
var resources = new List<Resource>();

string currentResourceID = string.Empty;
string currentCustomerID = string.Empty;
int totalRows = dataSet.Tables[0].Rows.Count;

var resource = new Resource();
var customer = new Customer();
var customers = new List<Customer>();
var appointments = new List<Appointment>();
bool newResource = false;
bool newCustomer = false;

for (int i = 0; i < totalRows; i++)
{
    var resourceID = dataSet.Tables[0].Rows[i]["resourceID"].ToString();
    var resourceName = dataSet.Tables[0].Rows[i]["resourceName"].ToString();
    var customerID = dataSet.Tables[0].Rows[i]["customerID"].ToString();
    var firstName = dataSet.Tables[0].Rows[i]["firstName"].ToString();
    var lastName = dataSet.Tables[0].Rows[i]["lastName"].ToString();
    var appointmentID = dataSet.Tables[0].Rows[i]["appointmentID"].ToString();
    var startDate = dataSet.Tables[0].Rows[i]["startDate"].ToString();
    var endDate = dataSet.Tables[0].Rows[i]["endDate"].ToString();

    if (!currentResourceID.Equals(resourceID))
    {
        currentResourceID = resourceID;

        resource = new Resource()
        {
            resourceID = resourceID,
            resourceName = resourceName
        };

        resources.Add(resource);

        newResource = true;
    }
    else
    {
        newResource = false;
    }

    if (newResource)
    {
        customers = new List<Customer>();

        resource.Customers = customers;
        currentCustomerID = string.Empty;

    }

    if (!currentCustomerID.Equals(customerID))
    {
        currentCustomerID = customerID;

        customer = new Customer()
        {
            customerID = customerID,
            firstName = firstName,
            lastName = lastName
        };


        customers.Add(customer);

        newCustomer = true;
    }
    else
    {
        newCustomer = false;
    }

    if (newCustomer)
    {
        appointments = new List<Appointment>();

        customer.Appointments = appointments;

    }

    var appointment = new Appointment()
    {
        appointmentID = appointmentID,
        startDate = startDate,
        endDate = endDate
    };

    appointments.Add(appointment);

}

//Convert nested class to json
JavaScriptSerializer serializer = new JavaScriptSerializer();
serializer.MaxJsonLength = Int32.MaxValue;
var resourceJSON = serializer.Serialize(resources);

使用 C#/VB.Net 将数据集设为 JSON

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