/// <summary>
/// Adds a query string parameter to the Uri.
/// </summary>
/// <typeparam name="TValue">The type of the value.</typeparam>
/// <param name="property">The property.</param>
/// <param name="value">The property value.</param>
/// <returns>Itself</returns>
public NavigateHelper <TViewModel> WithParam <TValue>(Expression <Func <TViewModel, TValue> > property, TValue value)
{
if (value is ValueType || !ReferenceEquals(null, value))
{
_parameters[PropertySupport.ExtractPropertyName(property)] = value.ToString();
}
return(this);
}
/// <summary>
/// Sets the property to listen for change notifications.
/// </summary>
/// <param name="target">The object to observe.</param>
/// <param name="property">The property.</param>
/// <returns>Itself</returns>
public DelegateCommandBuilder Observe <TProperty>(INotifyPropertyChanged target, Expression <Func <TProperty> > property)
{
if (target == null)
{
throw new ArgumentNullException(nameof(target));
}
if (_target != null)
{
throw new InvalidOperationException("Observe already set.");
}
if (property == null)
{
throw new ArgumentNullException(nameof(property));
}
var propertyName = PropertySupport.ExtractPropertyName(property);
_target = target;
_propertyNames = new[] { propertyName };
return(this);
}
/// <summary>
/// Raises the PropertyChanged event if needed.
/// </summary>
/// <typeparam name = "TProperty">The type of the property.</typeparam>
/// <param name = "property">The property expression.</param>
protected void RaisePropertyChanged <TProperty>(Expression <Func <TProperty> > property)
{
RaisePropertyChanged(PropertySupport.ExtractPropertyName(property));
}
/// <summary>
/// Validates the property.
/// </summary>
/// <typeparam name="TProperty">The type of the property.</typeparam>
/// <param name="property">The property.</param>
/// <param name="value">The value to validate.</param>
/// <returns>True, if validation succeeded.</returns>
public bool ValidateProperty <TProperty>(Expression <Func <TProperty> > property, object value)
{
var propertyName = PropertySupport.ExtractPropertyName(property);
return(ValidateProperty(propertyName, value));
}
/// <summary>
/// Determines whether the spezified property has validation errors.
/// </summary>
/// <typeparam name="TProperty">The type of the property.</typeparam>
/// <param name="property">The property.</param>
/// <returns>True, if the property has validation errors.</returns>
public bool HasPropertyError <TProperty>(Expression <Func <TProperty> > property)
{
var propertyName = PropertySupport.ExtractPropertyName(property);
return(HasPropertyError(propertyName));
}
/// <summary>
/// Gets all validation errors of the spezified property.
/// </summary>
/// <typeparam name="TProperty">The type of the property.</typeparam>
/// <param name="property">The property.</param>
/// <returns>List of validation errors.</returns>
public IEnumerable <string> GetPropertyError <TProperty>(Expression <Func <TProperty> > property)
{
var propertyName = PropertySupport.ExtractPropertyName(property);
return(GetPropertyError(propertyName));
}
/// <summary>
/// Removes all validation rules for a property.
/// </summary>
/// <typeparam name="TProperty">The type of the property.</typeparam>
/// <param name="property">The property.</param>
public void RemoveRules <TProperty>(Expression <Func <TProperty> > property)
{
var propertyName = PropertySupport.ExtractPropertyName(property);
RemoveRules(propertyName);
}
/// <summary>
/// Adds a <see cref="IValidationRule"/> to the validator.
/// </summary>
/// <typeparam name="TProperty">The type of the property.</typeparam>
/// <param name="property">The property.</param>
/// <param name="rule">The rule to add.</param>
public void AddRule <TProperty>(Expression <Func <TProperty> > property, IValidationRule rule)
{
var propertyName = PropertySupport.ExtractPropertyName(property);
AddRule(propertyName, rule);
}