is there any way to validate a string to be json or not ? other than try/catch .
I'm using ServiceStack Json Serializer and couldn't find a method related to validation .
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possible duplicate of Check JSON and XML is valid? c#Dennis Traub– Dennis Traub2012-08-06 20:42:30 +00:00Commented Aug 6, 2012 at 20:42
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that solution uses try/catch . I'm looking for method like TryParse that we have for int,date,... . just to check if string contains a valid json structure or notmohsen.d– mohsen.d2012-08-06 20:48:02 +00:00Commented Aug 6, 2012 at 20:48
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Possible duplicate of How to make sure that string is Valid JSON using JSON.NETMichael Freidgeim– Michael Freidgeim2016-08-05 06:55:42 +00:00Commented Aug 5, 2016 at 6:55
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3 Answers
Probably the quickest and dirtiest way is to check if the string starts with '{':
public static bool IsJson(string input){
input = input.Trim();
return input.StartsWith("{") && input.EndsWith("}")
|| input.StartsWith("[") && input.EndsWith("]");
}
Another option is that you could try using the JavascriptSerializer class:
JavaScriptSerializer ser = new JavaScriptSerializer();
SomeJSONClass = ser.Deserialize<SomeJSONClass >(json);
Or you could have a look at JSON.NET:
Comments
A working code snippet
public bool isValidJSON(String json)
{
try
{
JToken token = JObject.Parse(json);
return true;
}
catch (Exception ex)
{
return false;
}
}
1 Comment
WEFX
This misses scenarios when the payload is missing a closing } or ] .
You can find a couple of regular expressions to validate JSON over here: Regex to validate JSON
It's written in PHP but should be adaptable to C#.
