/// <summary>
/// This class implements Validation rule to validate required text.
/// </summary>
/// <remarks>This validation is rule used by <see cref="T:NeuroSpeech.UIAtoms.Controls.AtomTextBox"/>
/// control to validate property <see cref="P:System.Windows.Controls.TextElement.Text"/>.
/// You can use this rule to validate any string property on the control. It returns
/// <see cref="T:NeuroSpeech.UIAtoms.Validations.AtomValidationError"/> if the string is empty.
///
/// The child classes implement more specific validation by overriding method
/// <see cref="M:NeuroSpeech.UIAtoms.Validations.AtomStringValidationRule.IsStringValid"/>
/// to do specific business logic validation.
/// </remarks>
/// <param name="view">Control to validate</param>
/// <param name="property">Dependency Property to validate</param>
/// <param name="value">Text Value to validate</param>
/// <returns></returns>
public override AtomValidationError Validate(View e, BindableProperty property, object value)
{
//AtomTrace.WriteLine("AtomTextBox.Validate called...");
string text = value as string;
bool isRequired = AtomForm.GetIsRequired(e);
if (isRequired && string.IsNullOrEmpty(text))
{
return new AtomValidationError
{
Property = property,
Message = AtomForm.GetMissingValueMessage(e),
Source = e
}
}
;
int min = GetMinimumLength(e);
if (min != -1 && min != 0)
{
if (text == null || text.Length < min)
{
return(new AtomValidationError
{
Property = property,
Message = string.Format(AtomStringValidationRule.GetMinimumLengthErrorMessage(e), min),
Source = e
});
}
}
int max = GetMaximumLength(e);
if (max != -1 && max != 0 && max != int.MaxValue)
{
if (text.Length > max)
{
return(new AtomValidationError
{
Property = property,
Message = string.Format(AtomStringValidationRule.GetMaximumLengthErrorMessage(e), min),
Source = e
});
}
}
return(IsStringValid(value as string, property, e));
}
public override AtomValidationError Validate(View view, BindableProperty property, object value)
{
if (AtomForm.GetIsRequired(view))
{
if (value == null)
{
return new AtomValidationError
{
Source = view,
Property = property,
Message = AtomForm.GetMissingValueMessage(view)
}
}
;
}
return(null);
}
}
public override AtomValidationError Validate(View view, BindableProperty property, object value)
{
if (AtomForm.GetIsRequired(view))
{
var dt = DateTime.MinValue;
if (value != null)
{
dt = Convert.ToDateTime(value);
}
if (dt == DateTime.MinValue)
{
return new AtomValidationError
{
Source = view,
Property = property,
Message = AtomForm.GetMissingValueMessage(view)
}
}
;
}
return(null);
}
}