How to set Jira subject from a variable

[John Lawlor]

Hi, 

I have this working httpClient request which creates a Jira ticket. 

    using (var httpClient = new HttpClient())

    {

        using (var request = new HttpRequestMessage(new HttpMethod("POST"), restUrl))

        {

            request.Headers.TryAddWithoutValidation("Authorization", $"Basic {base64Credentials}");

            request.Content = new StringContent("{\"fields\":{\"project\":{\"id\":\"23100\",\"key\":\"Type\",\"name\":\"PPD Ticket\"},\"summary\":\"Sample Subject\",\"issuetype\":{\"name\":\"PPD Ticket\"},\"components\":[{\"name\":\"Test Name\"}],\"customfield_18563\":\"1.0.0\",\"customfield_18962\":{\"name\":\"location\"}}}");

            request.Content.Headers.ContentType = new MediaTypeHeaderValue("application/json");

            HttpResponseMessage response = await httpClient.SendAsync(request);

            string responseBody = await response.Content.ReadAsStringAsync();

            Console.WriteLine("Response: {0}", responseBody);

        }

    }

However, if I try to this string so the subject comes from a variable I get the error: "Failed to update transition. Status code: BadRequest"

Response: {"errorMessages":[],"errors":{"summary":"Field 'summary' cannot be set. It is not on the appropriate screen, or unknown.","customfield_18563":"Field 'customfield_18563' cannot be set. It is not on the appropriate screen, or unknown.","components":"Field 'components' cannot be set. It is not on the appropriate screen, or unknown.","customfield_18962":"Field 'customfield_18962' cannot be set. It is not on the appropriate screen, or unknown."}}

    String mysubject = "Test Subject";

    request.Content = new StringContent("{\"fields\":{\"project\":{\"id\":\"23100\",\"key\":\"PPD\",\"name\":\"PPD Ticket\"},\"summary\":" + mysubject + ,\"issuetype\":{\"name\":\"PPD Ticket\"},\"components\":[{\"name\":\"Product\"}],\"customfield_18563\":\"1.0.0\",\"customfield_19129\":\"http://jira\",\"customfield_18962\":{\"name\":\"text info\"}}}");