如何使用Delphi将JSON对象作为输入字符串传递给IDHTTP中的post方法

Question

＆＃34;我需要使用Delphi中IDHTTP的Post方法将JSON对象发送到URL。我尝试直接发送JSON对象字符串以及URL时遇到错误。＆＃34;

 [HttpPost]
        public bool SaveTestCases(String testCases)
        {
           //some codes

            return false;
        }
the above given is the post URL in the c# with the input string.
I am trying to send the JSON string as input to the URL from the IDHTTP post method.

procedure TfrmTestcases.btnSaveClick(Sender: TObject);
var
  http : TIdHTTP;
  ReqJson: TStringStream;
  data : TIdMultiPartFormDataStream;
begin
  http := TIdHTTP.Create(Self);
  data := TIdMultiPartFormDataStream.Create;
  ReqJson:= TStringStream.Create(DummyArray,TEncoding.UTF8);
  //dummyarray contain the Json string {"name":"abcd efgh","ID":"1"}
  http.Request.ContentType := 'application/json';
  http.Post('https://LocalHost/user/SaveTestCases?testCases='+DummyArray,ReqJson);
end;   

＆＃34;在这里我收到的HTTP 400错误是由于＆＃34; name＆＃34;之间的空格造成的。在DummyArray字符串中。有没有其他方式发送JSON     object作为上面给出的C＃post方法的输入＆＃34;