如何使用JSON和C#

时间:2015-06-21 22:21:14

标签: c# php json

我正在尝试联系一个简单的登录Web服务,该服务将确定JSON请求是否成功。目前,在C#程序中,我发现一个错误,说缺少JSON参数。在Web浏览器中请求的正确URL是:

https://devcloud.fulgentcorp.com/bifrost/ws.php?json=[{"action":"login"},{"login":"demouser"},{"password":"xxxx"},{"checksum":"xxxx"}]

我现在在C#中实现的代码是:

using System;
using System.IO;
using System.Net;
using System.Text;
using System.Web.Script.Serialization;

namespace request
{
    class MainClass
    {
        public static void Main (string[] args)
        {
            var httpWebRequest = (HttpWebRequest)WebRequest.Create("https://devcloud.fulgentcorp.com/bifrost/ws.php?");
            httpWebRequest.ContentType = "application/json";
            httpWebRequest.Method = "POST";

            using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
            {

                string json = new JavaScriptSerializer().Serialize(new
                {
                    action = "login",
                    login = "demouser",
                    password = "xxxx",
                    checksum = "xxxx"
                });
                Console.WriteLine ("\n\n"+json+"\n\n"); 

                streamWriter.Write(json);
            }
            var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
            using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
            {
                var result = streamReader.ReadToEnd();
                Console.WriteLine (result); 
            } 


        }
    }
}

1 个答案:

答案 0 :(得分:1)

示例URL看起来像是将JSON作为查询字符串传递 - 这是一个简单的GET请求。

您正在尝试POST JSON - 这是一种在查询字符串中传递JSON的更好方法 - 即由于长度限制以及需要转义简单字符(如空格)。但它不会像您的示例网址那样有效。

如果您能够修改服务器,我建议修改PHP以使用$ _REQUEST [' action']来使用数据,以及以下C#代码:

Public static void Main (string[] args)
{
    using (var client = new WebClient())
    {
            var Parameters = new NameValueCollection {
            {action = "login"},
            {login = "demouser"},
            {password = "xxxx"},
            {checksum = "xxxx"}

            httpResponse = client.UploadValues( "https://devcloud.fulgentcorp.com/bifrost/ws.php", Parameters);
            Console.WriteLine (httpResponse);
    }

}

如果必须将JSON作为查询字符串传递,则可以使用UriBuilder安全地创建完整的URL +查询字符串,然后发出GET请求 - 无需POST。