如何在C# Rest服务中从安卓应用读取JSON数据

URL url = new URL("http://your_rest_service_url");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
conn.setRequestProperty("Accept", "application/json");

if (conn.getResponseCode() == 200) {
    BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
    String line;
    StringBuilder stringBuilder = new StringBuilder();
    while ((line = reader.readLine()) != null) {
        stringBuilder.append(line);
    }
    reader.close();
    String json = stringBuilder.toString();

    // 在这里可以对获取到的JSON数据进行处理
} else {
    // 处理请求失败的情况
}
conn.disconnect();

using System.Net.Http;
using System.Web.Http;

public class DataController : ApiController
{
    [HttpGet]
    public IHttpActionResult GetJsonData()
    {
        // 从数据库或其他数据源获取JSON数据
        string jsonData = GetDataFromDatabase();

        // 返回JSON数据
        return Ok(jsonData);
    }

    private string GetDataFromDatabase()
    {
        // 连接数据库并获取JSON数据
        // ...
        return jsonData;
    }
}

using System.Web.Http;

public class WebApiApplication : System.Web.HttpApplication
{
    protected void Application_Start()
    {
        // 配置路由
        GlobalConfiguration.Configure(WebApiConfig.Register);
    }
}

public static class WebApiConfig
{
    public static void Register(HttpConfiguration config)
    {
        // 配置路由映射
        config.Routes.MapHttpRoute(
            name: "DefaultApi",
            routeTemplate: "api/{controller}/{action}/{id}",
            defaults: new { id = RouteParameter.Optional }
        );
    }
}