c# - 如何从 REST Web 服务返回自定义值

Question

我在我的项目中使用 REST Web 服务，它的返回值在 json 中，如下所示:

[{"MsgID":"92817137","Status":"0","SendTime":"2014-06-11 14:17:40","DeliverTime":"0000-00- 00 00:00:00"}]

但我不需要所有这些，我只需要“Statues”标签。我该怎么做？

我的代码是这样的:

    private void btnCheckStatus_Click(object sender, EventArgs e)
    {
        Uri address = new Uri("http://www.asanak.ir/webservice/v1rest/msgstatus");

        // Create the web request
        HttpWebRequest request = WebRequest.Create(address) as HttpWebRequest;

        // Set type to POST
        request.Method = "POST";
        request.ContentType = "application/x-www-form-urlencoded";

        // Create the data we want to send
        StringBuilder data = new StringBuilder();
        data.Append("username=" + textUserName.Text.Trim());
        data.Append("&password=" + textPassword.Text.Trim());
        data.Append("&msgid=" + textMsgId.Text.Trim());

        // Create a byte array of the data we want to send
        byte[] byteData = UTF8Encoding.UTF8.GetBytes(data.ToString());

        // Set the content length in the request headers
        request.ContentLength = byteData.Length;

        // Write data
        using (Stream postStream = request.GetRequestStream())
        {
            postStream.Write(byteData, 0, byteData.Length);
        }

        // Get response
        using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
        {
            StreamReader reader = new StreamReader(response.GetResponseStream());
            textResult.Text = reader.ReadToEnd();
        }
    }

我希望我的返回值是这样的:"Status":"0"

谢谢

Answer 1

如果您无法更改网络服务的方法以使其仅返回您需要的值，唯一的方法是在您的代码中自定义响应。

// Get response
using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
{
    StreamReader reader = new StreamReader(response.GetResponseStream());

    //add your code here to customize the return value
    var array = Newtonsoft.Json.Linq.JArray.Parse(reader.ReadToEnd());
    var jObject = new Newtonsoft.Json.Linq.JObject();
    jObject.Add("Status", array[0].Value<string>("Status"));

    textResult.Text = jObject.ToString();

}