I have the following...
JArray clients = (JArray)clientsParsed["objects"];
foreach (JObject item in clients.Children())
{
// etc.. SQL params stuff...
command.Parameters["@MyParameter"].Value = JTokenToSql(item["thisParameter"]);
}
JTokenToSql
looks like this...
public static object JTokenToSql(JToken obj)
{
if (obj.Any())
return (object)obj;
else
return (object)DBNull.Value;
}
I have tried ((JObject)obj).Count
also.. But doesn't seem to be working.
To check whether a property exists on a JObject
, you can use the square bracket syntax and see whether the result is null or not. If the property exists, a JToken
will be always be returned (even if it has the value null
in the JSON).
JToken token = jObject["param"];
if (token != null)
{
// the "param" property exists
}
If you have a JToken
in hand and you want to see if it is non-empty, well, that depends on what type of JToken
it is and how you define "empty". I usually use an extension method like this:
public static class JsonExtensions
{
public static bool IsNullOrEmpty(this JToken token)
{
return (token == null) ||
(token.Type == JTokenType.Array && !token.HasValues) ||
(token.Type == JTokenType.Object && !token.HasValues) ||
(token.Type == JTokenType.String && token.ToString() == String.Empty) ||
(token.Type == JTokenType.Null) ||
(token.Type == JTokenType.Undefined)
}
}