Question

当我尝试向Web API中存在的方法提交POST请求时出现错误，发送的参数始终为NULL，下面我将提交WEB API POST方法：

    public string Post([FromBody]string value)
    {
        var jsonObject = JsonConvert.DeserializeObject(value);

        return jsonObject.ToString();
    }

我确定上面的方法可以正常工作，正如我在POSTMAN上测试的那样，下面我将发布调用REST WEB API的方法：

    static void Main(string[] args)
    {

        string fullURL = "http:/localhost:54029/api/values";
        //Creating a Webrequest with any URL.
        var httpWebRequest = (HttpWebRequest)WebRequest.Create(fullURL);
        httpWebRequest.ContentType = "application/json";
        //Defining Method type that will be used with this webrequest
        httpWebRequest.Method = "POST";

        //Creating the JSON Object with the required properties.
        var json = new JObject(
                                        new JProperty("Id", "ee288h0emlya"),
                                        new JProperty("isDone", "False"),
                                        new JProperty("stage", "Preparation"),
                                        new JProperty("status", "Done"));


        using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
        {
            //Writing to the web service, emptying and closing the stream.
            streamWriter.Write(json);
            streamWriter.Flush();
            streamWriter.Close();
        }
        //Get the response from the server.
        var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
        using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
        {
            //Saving the response to result variable.
            var result = streamReader.ReadToEnd();
            Console.WriteLine(result);
        }

当我使用第二种方法调用第一种方法时，参数值始终为 null ，因此我得到一个空的响应和错误。

有人可以帮忙吗？

Answer 1

如果您接受参数作为字符串，那么您也应该将其作为字符串发送：

string json = "\"{ \\\"documentId\\\": \\\"Hmmm\\\", \\\"isDone\\\": \\\"YES\\\", \\\"stage\\\": \\\"Preparations\\\", \\\"status\\\": \\\"Done \\\"}\"";

另一种选择是创建一个DTO / Model类，然后像在代码中一样进行传递。

如何在C＃中包含[FromBody]的REST Web服务中调用方法

1 个答案: