public static bool TryEvaluateExpression(this IQueryElement expr, EvaluationContext context, out object?result)
{
var info = expr.TryEvaluateExpression(context);
result = info.Value;
return(info.IsEvaluated);
}
public static object?EvaluateExpression(this IQueryElement expr, EvaluationContext context)
{
var info = expr.TryEvaluateExpression(context);
if (!info.IsEvaluated)
{
var message = info.ErrorMessage ?? GetEvaluationError(expr);
throw new LinqToDBException(message);
}
return(info.Value);
}
public static bool CanBeEvaluated(this IQueryElement expr, EvaluationContext context)
{
return(expr.TryEvaluateExpression(context).IsEvaluated);
}
public static bool CanBeEvaluated(this IQueryElement expr, bool withParameters)
{
return(expr.TryEvaluateExpression(new EvaluationContext(withParameters ? SqlParameterValues.Empty : null)).IsEvaluated);
}
public static bool TryEvaluateExpression(this IQueryElement expr, EvaluationContext context, out object?result)
{
(result, var error) = expr.TryEvaluateExpression(context);
return(error == null);
}
