Question

我＆＃39;在使用地理编码API的谷歌时，我可以获得包含所有日期的JSON字符串，但是当我将它转换为对象时，它不起作用，它返回任何内容，我使用JSON.NET ，我做错了什么？

在所有JSON数据中，我只想采用formatted_address。

json请求：http://maps.googleapis.com/maps/api/geocode/json?address=av.paulista&sensor=false%22

抱歉，我的英文不好

我的主要表单：获取JSON数据（正常工作）

private void btnConsumir_Click(object sender, EventArgs e)
    {
        string address = txtAddress.Text ;

        string searchCode = "http://maps.googleapis.com/maps/api/geocode/json?address=" + address + "&sensor=false";
        var JSONdata = "";


        var httpWebRequest = (HttpWebRequest)WebRequest.Create(searchCode);
        httpWebRequest.ContentType = "text/json";
        httpWebRequest.Method = "POST";


        var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream());

        var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();

        using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
        {
            JSONdata = streamReader.ReadToEnd();
        }

        lblJSON.Text = JSONdata;//its a label

这里我想在json上获取formatted_address信息：

[...]
using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
        {
            JSONdata = streamReader.ReadToEnd();
        }

        lblJSON.Text = JSONdata;//its a label

        AddressObject addressObject = JsonConvert.DeserializeObject<addressObject>(JSONdata);
        string result = addressObject.formatted_address;

        lblJSON.Text = result;

这是我的类对象：

class AddressObject
    {
        public string formatted_address { get; set; }




    }

非常感谢你！

Answer 1

从api返回的结果远远超过formatted_address。您需要反序列化整个图表，然后选择您想要的内容。

使用下面的类结构，您可以这样做：

Rootobject mapdata = JsonConvert.DeserializeObject<Rootobject>(JSONdata);

...

public class Rootobject
{
    public Result[] results { get; set; }
    public string status { get; set; }
}

public class Result
{
    public Address_Components[] address_components { get; set; }
    public string formatted_address { get; set; }
    public Geometry geometry { get; set; }
    public string place_id { get; set; }
    public string[] types { get; set; }
}

public class Geometry
{
    public Location location { get; set; }
    public string location_type { get; set; }
    public Viewport viewport { get; set; }
}

public class Location
{
    public float lat { get; set; }
    public float lng { get; set; }
}

public class Viewport
{
    public Northeast northeast { get; set; }
    public Southwest southwest { get; set; }
}

public class Northeast
{
    public float lat { get; set; }
    public float lng { get; set; }
}

public class Southwest
{
    public float lat { get; set; }
    public float lng { get; set; }
}

public class Address_Components
{
    public string long_name { get; set; }
    public string short_name { get; set; }
    public string[] types { get; set; }
}

使用JSON.NET c＃

1 个答案: