Question

我正在尝试获取“响应，序列化和使用”web api，我从未编写过web api代码。

我有以下Web API：

 [HttpGet]     
 public IHttpActionResult SendMsg(string yourName)       
 {

        var result = "Hi " + yourName;
        if (result == null)
        {
            return NotFound();
        }
        return Ok(result);
  }

我试图通过此代码获得响应：

    private void ResponseWebAPI(string strApiAddress)
    {
        HttpWebRequest request = WebRequest.Create(strApiAddress) as HttpWebRequest;
        HttpWebResponse response = request.GetResponse() as HttpWebResponse;

        XmlDocument xmlDoc = new XmlDocument();
        xmlDoc.Load(response.GetResponseStream());

    }

我收到的回复没有任何问题，但是当我加载回复时出现以下错误：

根级别的数据无效。第1行，第1位

Answer 1

试试这个

private void ResponseWebAPI(string strApiAddress) {
    var request = WebRequest.Create(strApiAddress) as HttpWebRequest;
    var response = request.GetResponse() as HttpWebResponse;

    using (Stream stream = response.GetResponseStream()) {
        var reader = new StreamReader(stream, Encoding.UTF8);
        var responseString = reader.ReadToEnd();
        var xmlDoc = new XmlDocument();
        xmlDoc.LoadXml(responseString);
    }

}

Answer 2

我已经尝试过您的代码了。

首先，您确定收到的是XML而不是JSON。
要解析XML，您必须编写以下内容：Serialize XML Response

我建议您使用HttpClient代替HttpWebRequest，如下所示：

public async Task<Model> GetData(string url)
        {           
            HttpClient httpClient = new HttpClient();

            httpClient.BaseAddress = new Uri(url);

            httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

            HttpResponseMessage result = await httpClient.GetAsync(url);

            if (result.IsSuccessStatusCode)
            {
                string contentResult = await result.Content.ReadAsStringAsync();

                Model newModel = JsonConvert.DeserializeObject<Model>(contentResult);

            }

            return newModel;
        }

Answer 3

将请求Accept标头设置为application / json。

request.Accept = "application/json";

然后将响应作为JSON使用。

或者，您可以使用HttpClient，它具有更简单，更现代的API。

https://www.asp.net/web-api/overview/advanced/calling-a-web-api-from-a-net-client

public static async Task DoAsync()
{
    var strApiAddress = "http://localhost";
    HttpClient client = new HttpClient();
    var str = await client.GetStringAsync(strApiAddress);
}

public static void Do()
{
    var strApiAddress = "http://localhost";
    HttpClient client = new HttpClient();
    var str = client.GetStringAsync(strApiAddress).Result;
}

如何获取Web API IHttpActionResult响应并序列化c＃

3 个答案: