Bad request 400 returns from API Patch method

Question

I'm using .net core web api. in my API controller class have PATCH method as follows,

[HttpPatch("updateMessageTemplate/{templateId}")]
public IActionResult UpdateMessageTemplate([FromHeader] int tenantId, int templateId,[FromBody] testClass msg)
{
    try
    {
        //Some implementation is here
        return Accepted();
    }
    catch
    {
        return StatusCode(500);
    }
}

testClass as follows,

public class testClass
{
    public string body { get; set; }
}

I called the API from postman and its returns 400 BadRequest.

I placed the breakpoint in Controller method, but its not hitting. after I removed the [FromBody] testClass msg from the method parameter breakpoin hit without return 400 . why its returns 400 when I use [FromBody] testClass msg ? And how can I call this controller method from the HTTP Client ?.

I tried this, its also returns 400 BadRequest

string serviceUrl = string.Format("{0}/notification/updateMessageTemplate/{1}", ConfigurationManager.AppSettings["LtApiUrl"], templateID);

string json = "[{\"body\":\"sample text\"}]";

HttpClient client = new HttpClient();
HttpMethod method = new HttpMethod("PATCH");
HttpRequestMessage message = new HttpRequestMessage(method, serviceUrl);

StringContent content = new StringContent(json, Encoding.UTF8, "application/json");
client.DefaultRequestHeaders.Add("tenantId", tenantId.ToString());
client.DefaultRequestHeaders.Add("Authorization", string.Format("bearer {0}", token));
message.Content = content;

var response = client.SendAsync(message).Result;               
return response.StatusCode.ToString();

How can I solve this? please help me. I deleted the previous question and this is my real problem

Updated:

I changed the postman request as.

after that its works. but when I call it through http client code its provides 400 BadRequest. how to provide JSON body correct way through http client

Please don't open new questions. Edit your original question. — canton7, Oct 20 '19 at 18:42
@canton7 I deleted it sir, no one care about that question :( I'm really stuck with this. please help me — thomsan, Oct 20 '19 at 18:44
I still recommend increasing the logging on the server, and getting it to tell you what's wrong with the request. — canton7, Oct 20 '19 at 19:05
Also try removing bits. Take out the header. Does that make it work? Remove the url param, the body, make it get or post instead of patch. Figure out which bit specifically is causing the problem. — canton7, Oct 20 '19 at 21:33
@canton7 I changed the postman request as https://i.imgur.com/NF1OaNl.png . after that its works. but when I call it through http client code its provides 400 BadRequest . How to pass [FromBody] in correct way — thomsan, Oct 21 '19 at 02:06

Rena · Accepted Answer · 2019-10-21T02:14:31.200

2

For you use FromBody,you need to send request with json instead of form data.You could change your postman like below:

1.change the ContentType to application/json:

2.change the Body to raw and choose the style JSON:

UPDATE:

You need change your json like below:

string json = "{\"body\":\"sample text\"}";

edited Oct 21 '19 at 02:14

answered Oct 21 '19 at 02:07

Rena

30,832
6
37
72

yeah I did it and solved it through the POSTMAN. but how can I call it through the http client code(please check my code in question). please help me to solve that. – thomsan Oct 21 '19 at 02:09

score 1 · Answer 2 · answered Oct 20 '19 at 19:20

1

Could you please try this.

[HttpPatch("updateMessageTemplate/{templateId}")]
public IActionResult UpdateMessageTemplate([FromHeader] int tenantId, int templateId, 
[FromBody] JsonPatchDocument<testMsg> msg)
 {
 try
 {
    //Some implementation is here
    return Accepted();
 }
 catch
 {
    return StatusCode(500);
 }
}

answered Oct 20 '19 at 19:20

So_oP

1,211
15
31

Not working. have any proper way to find the real issue by debugging – thomsan Oct 21 '19 at 01:37
I changed the postman request as https://i.imgur.com/NF1OaNl.png . after that its works. but when I call it through http client code its provides 400 BadRequest – thomsan Oct 21 '19 at 02:05

Bad request 400 returns from API Patch method

2 Answers2