为什么是我的字符串抛出错误

Question

我想为城市飞艇api的目标字符串类型"application/json"。你们能帮我一下我的弦和结构有什么问题吗?

string postData = "{"audience":"all","device_types":["android"],"notification":{"alert":"This is a broadcast."}}";

我确实尝试在下面添加反斜杠""示例:

string postData = "{"audience":"all","device_types":["android"],"notification":{"alert":"This is a broadcast."}}";

下面是我的完整代码:

 // Create a request using a URL that can receive a post. 
            WebRequest request = WebRequest.Create("https://go.urbanairship.com/api/push/");
            // Set the Method property of the request to POST.
            request.Method = "POST";
            // Create POST data and convert it to a byte array. 
            string postData = "{'audience':'all','device_types':'['android']','notification': {'alert':'This is a broadcast.'}";


            byte[] byteArray = Encoding.UTF8.GetBytes(postData);
            // Set the ContentType property of the WebRequest.
            request.ContentType = "application/json";
            // Set the ContentLength property of the WebRequest.
            request.ContentLength = byteArray.Length;
            //Do a http basic authentication somehow
            string username = "Zx5EPSG7Qhu-BvYtz0laTg";
            string password = "sIaj2CjASlm27pimHqOfhA";
            string usernamePassword = username + ":" + password;
            CredentialCache mycache = new CredentialCache();
            mycache.Add(new Uri("https://go.urbanairship.com/api/push/"), "Basic", new NetworkCredential(username, password));
            request.Credentials = mycache;
            request.Headers.Add("Authorization", "Basic " + Convert.ToBase64String(new ASCIIEncoding().GetBytes(usernamePassword)));
            // Get the request stream.
            Stream dataStream = request.GetRequestStream();
            // Write the data to the request stream.
            dataStream.Write(byteArray, 0, byteArray.Length);
            // Close the Stream object.
            dataStream.Close();
            // Get the response.
            WebResponse response = request.GetResponse();
            // Display the status.
            Console.WriteLine(((HttpWebResponse)response).StatusDescription);
            // Get the stream containing content returned by the server.
            dataStream = response.GetResponseStream();
            // Open the stream using a StreamReader for easy access.
            StreamReader reader = new StreamReader(dataStream);
            // Read the content.
            string responseFromServer = reader.ReadToEnd();
            // Display the content.
            Console.WriteLine(responseFromServer);
            // Clean up the streams.
            reader.Close();
            dataStream.Close();
            response.Close();

I got below error:

400 Bad Request – The request body was invalid, either due to malformed JSON or a data validation error. See the response body for more detail.

Answer 1

应该可以:

{
     "audience" : "all",
     "device_types" : ["android"],
     "notification" : {
         "alert" : "This is a broadcast."
     }
 }

Answer 2

您在第一个值中使用小字体，在"all":

之后添加 ' 符号

{
    "audience": "all"', 
    "device_types": [
        "android"
    ],
    "notification": {
        "alert": "This is a broadcast."
    }
}

将来，您可以使用在线验证器来处理这种情况，如JSONLint。