为什么这段代码无法运行,我想检查JSON中是否包含键
错误是:
PurchasedValue
的整数?() :public PropertyInfo(Newtonsoft.Json.Linq.JToken jToken)
{
this.jToken = jToken;
int PurchasedValue = (int)(jToken["PurchasedValue"].Value ?? 0);
}
错误是:
Error CS0019: Operator `??' cannot be applied to operands of type `method group' and `int' (CS0019)