public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
{
if (value is string)
{
ExpressionInfo expression = ExpressionInfo.FromString((string)value);
if (EvaluatorService.IsEmptyExpression(expression))
{
return(expression);
}
}
return(base.ConvertFrom(context, culture, value));
}
/// <summary>
/// Checks if a length expression preperty is literal. If so, it validates it against the specified min/max range limit.
/// </summary>
/// <param name="evaluator">the evaluator to use for evaluation</param>
/// <param name="expression"><see cref="ExpressionInfo"/> value to validate.</param>
/// <param name="min"><see cref="Length"/> value representing the minium size allowed</param>
/// <param name="max"><see cref="Length"/> value representing the maximum size allowed</param>
public static void ValidateLength(EvaluatorService evaluator, ExpressionInfo expression, Length min, Length max)
{
if (expression != null && expression.IsConstant && !EvaluatorService.IsEmptyExpression(expression))
{
object result = evaluator.EvaluateExpression(expression);
if (result == null)
{
return;
}
string temp = result.ToString();
if (temp.Length > 0)
{
Length size = temp.Trim();
ValidateLength(size, min, max);
}
}
}
/// <summary>
/// Returns <see cref="CultureInfo"/> determined from the specified language.
/// </summary>
public static CultureInfo CultureFromLanguage(string languageName)
{
if (string.IsNullOrEmpty(languageName) || EvaluatorService.IsEmptyExpression(ExpressionInfo.FromString(languageName)))
{
return(null);
}
CultureInfo culture = null;
try
{
culture = new CultureInfo(languageName);
if (culture.IsNeutralCulture)
{
culture = CultureInfo.CreateSpecificCulture(culture.Name);
}
}
catch (ArgumentException)
{
Trace.TraceError("Invalid language specified ({0}).", languageName);
}
return(culture);
}
/// <summary>
/// Performs validation using the specified evaluator.
/// </summary>
public void Validate(EvaluatorService evaluator)
{
ValidationUtils.ValidateLength(evaluator, LineWidth, _minWidth, _maxWidth);
}
/// <summary>
/// Performs validation using the specified evaluator.
/// </summary>
public void Validate(EvaluatorService evaluator)
{
ValidationUtils.ValidateLength(evaluator, Size, _minSize, _maxSize);
}
