public override int Visit(IfNode obj)
{
bool b = _engine.EvalToBool(_engine.Eval(obj.Expr));
if (b)
{
if (obj.TrueNode != null)
{
return(obj.TrueNode.Accept(this));
}
else
{
return(0);
}
}
else
{
if (obj.FalseNode != null)
{
return(obj.FalseNode.Accept(this));
}
else
{
return(0);
}
}
}
protected override void DoCheck(IValidateResult result, object instance, object propertyValue)
{
//Extend:use cache to improve performance.
ExpressionLanguageEngineConfig cfg = new ExpressionLanguageEngineConfig(EvalExceptionHandlingPolicy.IgnorePolicy);
ExpressionLanguageEngine engine = ExpressionLanguageEngine.CreateEngine(cfg);
engine.Assign(INSTANCE, instance);
engine.Assign(VALUE, propertyValue);
object b = engine.Eval(_expr);
if (!engine.EvalToBool(b))
{
string msg = string.Format(MSG, _pInfo.Name, instance.GetType().Name, propertyValue, _expr);
this.LogValidateResult(result, msg);
}
}