I've had a look at a few threads but what I'm aiming for I can't seem to find.
I have the following JSON strings returned:
On success:
{"success":{"username":"key"}}
On Error:
{"error":{"type":101,"address":"/","description":"link button not pressed"}}
I need to be able to de-serialize these into a class and determine whether I've got an error or a success message to carry on doing it. Any ideas on how to achieve this?
thanks,
Adam
No need to declare a lot of tiny classes. dynamic keyword can help here.
dynamic jObj = JObject.Parse(json);
if (jObj.error!= null)
{
string error = jObj.error.description.ToString();
}
else
{
string key = jObj.success.username.ToString();
}
One option is to use http://nuget.org/packages/newtonsoft.json - you can either create your own custom class to deserialize into or use dynamic as the target type.
var result = JsonConvert.DeserializeObject<Result>(jsonString);
class Result
{
public SuccessResult success { get; set; }
public ErrorResult error { get; set; }
}
class SuccessResult
{
public string username { get; set; }
}
class ErrorResult
{
public int type { get; set; }
public string address { get; set; }
public string description { get; set; }
}
If you need just to check for success, it is possible to just check result.StartsWith("{\"success\":") to avoid unnecessary parsing. But this should only be done if you have guarantee that the JSON string will always be exactly like this (no extra whitespaces etc.) - so it is usually only appropriate if you own the JSON generation yourself.
This answer covers most options, including rolling your own parser and using JSON.Net:
You could also just write a regex if the format is going to be that simple...
