Below is a string which I want to dynamically pass to Json:
String username = 'IntegrationUser' Below is the json format wherein I want to pass username. But this does not work.
String payload = '{"UserID": '+ username + '}'; I even tried below line of code but didnt work
String payload = '{"UserID":'+username +'}'; How to pass this dynamic value ?
I always recommend using the serialize method to generate correct JSON:
String payload = JSON.serialize( new Map<String, Object> { 'UserID' => username }); This will emit the correct JSON, even if your username were to contain special characters, etc.
Your payload isn't formatted correctly. You need to wrap your dynamic string in double-quotes. These quotes won't need to be escaped, but it might be worth escaping your string to avoid any " causing the string to end prematurely.
String payload = '{"UserID":"'+username +'"}'; req.setBody('{"accountid":"0015g000004mi4BAAQ","name":"'+myname+'","website":"'+web+'"}');
works perfectly
req.setBody() is not mentioned anywhere in the question. It's important to read and understand the question before answering, to explain your solution, and to make it relevent to the question being asked. userObject uo = new userObject(); uo.userId = 'someId'; // here's your JSON object string jsonString = JSON.serialize(uo); // class code
public class userObject{ public string UserId{get;set;} } 