Greetings!
As you've noticed, ClearScript doesn't automatically convert
First, here's a general-purpose class for lazily evaluating a JavaScript expression and caching the result:
And here's a class that uses it to define a
Finally, your sample code can look like this (with a few tweaks and recommended simplifications):
Good luck!
As you've noticed, ClearScript doesn't automatically convert
DateTime instances into JavaScript dates; such conversion is lossy and not always desirable. However, because it's often useful, we recommend the following.First, here's a general-purpose class for lazily evaluating a JavaScript expression and caching the result:
publicclass CachedJsValue { privateclass Holder { publicobject Value; } privatereadonly ConditionalWeakTable<ScriptEngine, Holder> table = new ConditionalWeakTable<ScriptEngine, Holder>(); privatereadonlystring expression; public CachedJsValue(string expression) { this.expression = "(" + expression + ").valueOf()"; } publicobject Get(ScriptEngine engine) { var holder = table.GetOrCreateValue(engine); if (holder.Value == null) Interlocked.CompareExchange(ref holder.Value, engine.Evaluate(expression), null); return holder.Value; } publicdynamic GetDynamic(ScriptEngine engine) { return Get(engine); } }
ToJsDate extension method for DateTime:publicstaticclass DateTimeScriptExtensions { privatestaticreadonly CachedJsValue createDateFunc = new CachedJsValue(@" function (y, m, d, h, min, s, ms) { return new Date(y, m, d, h, min, s, ms); } "); publicstaticobject ToJsDate(this DateTime dt, ScriptEngine engine) { return createDateFunc.GetDynamic(engine)( dt.Year, dt.Month - 1, dt.Day, dt.Hour, dt.Minute, dt.Second, dt.Millisecond ); } }
var engine = new V8ScriptEngine(); engine.Execute(@" function my_func(props) { var m_date = props.my_date; var m_code = props.my_code; var yeay = m_date.getFullYear(); return yeay; } "); var properties = new PropertyBag(); properties["my_code"] = 20; properties["my_date"] = DateTime.Now.ToJsDate(engine); Console.WriteLine(engine.Script.my_func(properties));