public override async Task UpdateProperties(T destination1, Dictionary <string, string> matches, Dictionary <string, string> excelRow, RecordMode recordMode)
{
{
var product = new Product();
var productCategoryPropertyName = "ProductCategoryCode";
var productPropertyName = PropertyNameHelper.GetPropertyName(() => product.ProductName);
foreach (var destinationProperty in matches.Keys)
{
var xlsxColumnName = matches[destinationProperty];
var value = excelRow[xlsxColumnName];
if (destinationProperty == productCategoryPropertyName)
{
var newCategory =
await _context.Set <ProductCategory>().Where(x => x.CategoryCode == value).FirstOrDefaultAsync();
if (newCategory == null)
{
throw new RowParseException("Category Code does not match a category");
}
destination1.ProductCategory = newCategory;
}
else if (destinationProperty == productPropertyName)
{
destination1.ProductName = value;
}
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="CF.Xamarin.Forms.Classes.PropertyChangeListener"/> class.
/// </summary>
/// <param name="owner">Owner.</param>
/// <param name="callback">Callback.</param>
public void Listen <TModel>(Expression <Func <TModel, object> > property, object owner, Action callback)
{
if (callback == null)
{
throw new ArgumentNullException("callback");
}
if (owner == null)
{
throw new ArgumentNullException("owner");
}
_notifyChangedObject = owner as INotifyPropertyChanged;
if (_notifyChangedObject == null)
{
throw new ArgumentNullException("owner as IPropertyNotifyChanged");
}
_propertyName = PropertyNameHelper.GetPropertyName <TModel>(property);
if (string.IsNullOrEmpty(_propertyName))
{
throw new ArgumentException("property");
}
_callback = callback;
// Hook up event
_notifyChangedObject.PropertyChanged += HandlePropertyChangedEventHandler;
// Start by updating:
_callback();
}
protected void OnPropertyChanged <T>(Expression <Func <T> > propertyExpression)
{
string propertyName = PropertyNameHelper.GetPropertyName(propertyExpression);
if (propertyName != null)
{
OnPropertyChanged(propertyName);
}
}
/// <summary>
/// Calls the notify property changed event if it is attached. By using some
/// Expression/Func magic we get compile time type checking on our property
/// names by using this method instead of calling the event with a string in code.
/// </summary>
/// <param name="property">Property.</param>
protected void RaisePropertyChangedEvent(Expression <Func <object> > property)
{
if (PropertyChanged == null)
{
return;
}
PropertyChanged(this, new PropertyChangedEventArgs(
PropertyNameHelper.GetPropertyName <BaseNotifyPropertyChangedObject>(property)));
}
/// <summary>
/// Initializes a new instance of the <see cref="ViewDecorator"/> class.
/// </summary>
/// <param name="relativeLayout">Relative layout.</param>
/// <param name="contents">Contents.</param>
public ViewDecorator(RelativeLayout relativeLayout, View contents)
{
// Add contents
relativeLayout.Children.Add(contents, () => relativeLayout.Bounds);
// Create overlay
var activityIndicatorOverlay = new RelativeLayout {
BackgroundColor = Color.FromRgba(0x05, 0x05, 0x05, 0.75)
};
activityIndicatorOverlay.SetBinding(RelativeLayout.IsVisibleProperty,
PropertyNameHelper.GetPropertyName <TViewModel>((vm) => vm.IsBusy));
relativeLayout.Children.Add(activityIndicatorOverlay, () => relativeLayout.Bounds);
// Create darker rectangle in the middle
var activityIndicatorBackground = new RoundedBorderControl {
BackgroundColor = Color.FromRgba(0, 0, 0, 0.78),
CornerRadius = 8,
};
activityIndicatorOverlay.Children.Add(activityIndicatorBackground, () =>
new Rectangle(activityIndicatorOverlay.Width / 2 - 81, activityIndicatorOverlay.Height / 2 - 41, 81 * 2, 82));
// Create indicator
var activityIndicator = new ActivityIndicator {
Color = Color.White
};
activityIndicator.SetBinding(ActivityIndicator.IsRunningProperty,
PropertyNameHelper.GetPropertyName <TViewModel>((vm) => vm.IsBusy));
activityIndicatorOverlay.Children.Add(activityIndicator, () =>
new Rectangle(activityIndicatorOverlay.Width / 2 - 16, activityIndicatorOverlay.Height / 2 - 24, 32, 32));
// Create label with progress text
var activityLabel = new Label {
TextColor = Color.White,
BackgroundColor = Color.Transparent,
FontSize = 12,
XAlign = TextAlignment.Center
};
activityLabel.SetBinding(Label.TextProperty,
PropertyNameHelper.GetPropertyName <TViewModel>((vm) => vm.IsBusyText));
activityLabel.SetBinding(Label.IsVisibleProperty,
PropertyNameHelper.GetPropertyName <TViewModel>((vm) => vm.IsBusyTextVisible));
activityIndicatorOverlay.Children.Add(activityLabel, () =>
new Rectangle(activityIndicatorOverlay.X, activityIndicatorOverlay.Height / 2 + 14,
activityIndicatorOverlay.Width, 32));
}
/// <summary>
/// Creates or returns the
/// </summary>
/// <returns>The command.</returns>
/// <param name="action">Action.</param>
/// <param name="state">State.</param>
protected Command <T> GetOrCreateCommand <TViewModel, T>(Expression <Func <object> > commandProperty,
Command <T> command)
{
var commandName = PropertyNameHelper.GetPropertyName <TViewModel> (commandProperty);
if (!_commands.ContainsKey(commandName))
{
_commands.Add(commandName, command);
}
return(_commands [commandName] as Command <T>);
}
/// <summary>
/// Adds a dependency between a command and a property. Whenever the property changes, the command's
/// state will be updated
/// </summary>
/// <param name="property">Source Property.</param>
/// <param name="command">Target Command.</param>
protected void AddCommandDependency <TViewModel>(Expression <Func <object> > property, Command command)
{
var propertyName = PropertyNameHelper.GetPropertyName <TViewModel>(property);
if (!_commandDependencies.ContainsKey(propertyName))
{
_commandDependencies.Add(propertyName, new List <Command> ());
}
var list = _commandDependencies [propertyName];
list.Add(command);
}
/// <summary>
/// Adds a dependency between a property and another property. Whenever the property changes, the command's
/// state will be updated
/// </summary>
/// <param name="property">Source property.</param>
/// <param name="dependantProperty">Target property.</param>
protected void AddPropertyDependency <TViewModel>(Expression <Func <object> > property,
Expression <Func <object> > dependantProperty)
{
var propertyName = PropertyNameHelper.GetPropertyName <TViewModel>(property);
if (!_propertyDependencies.ContainsKey(propertyName))
{
_propertyDependencies.Add(propertyName, new List <Expression <Func <object> > > ());
}
var list = _propertyDependencies [propertyName];
list.Add(dependantProperty);
}
/// <summary>
/// Sets a value in viewmodel storage and raises property changed if value has changed
/// </summary>
/// <param name="name">Name.</param>
/// <param name="value">Value.</param>
/// <typeparam name="TValueType">The 1st type parameter.</typeparam>
protected bool SetValue <TValueType>(Expression <Func <object> > property, TValueType value)
{
var existingValue = GetValue <TValueType>(property);
var propertyName = PropertyNameHelper.GetPropertyName <BaseViewModel>(property);
// Check for equality
if (!_notifyChangeForSameValues.Contains(propertyName) &&
EqualityComparer <TValueType> .Default.Equals(existingValue, value))
{
return(false);
}
_viewModelStorage.SetObjectForKey <TValueType> (propertyName, value);
RaisePropertyChangedEvent(property);
// Dependent properties?
if (_propertyDependencies.ContainsKey(propertyName))
{
foreach (var dependentProperty in _propertyDependencies[propertyName])
{
RaisePropertyChangedEvent(dependentProperty);
}
}
// Dependent commands
if (_commandDependencies.ContainsKey(propertyName))
{
foreach (var dependentCommand in _commandDependencies[propertyName])
{
RaiseCommandStateChangedEvent(dependentCommand);
}
}
return(true);
}
public void TestGetPropertyName()
{
Assert.AreEqual("StaticString", PropertyNameHelper.GetPropertyName(() => TestClass.StaticString));
Assert.AreEqual("InstanceString", PropertyNameHelper.GetPropertyName((TestClass t) => t.InstanceString));
}
protected void OnPropertyChanged <TModel>(Expression <Func <TModel, Object> > propertyExpression)
{
OnPropertyChanged(PropertyNameHelper.GetPropertyName(propertyExpression));
}
/// <summary>
/// Calls the notify property changed event if it is attached. By using some
/// Expression/Func magic we get compile time type checking on our property
/// names by using this method instead of calling the event with a string in code.
/// </summary>
/// <param name="property">Property.</param>
protected string GetPropertyName(Expression <Func <TViewModel, object> > property)
{
return(PropertyNameHelper.GetPropertyName <TViewModel> (property));
}
/// <summary>
/// Calls the notify property changed event if it is attached. By using some
/// Expression/Func magic we get compile time type checking on our property
/// names by using this method instead of calling the event with a string in code.
/// </summary>
/// <param name="property">Property.</param>
protected string GetPropertyName <TOwner>(Expression <Func <TOwner, object> > property)
{
return(PropertyNameHelper.GetPropertyName <TOwner> (property));
}
/// <summary>
/// Adds the raise notify changed for property when value is the same.
/// </summary>
/// <param name="property">Property.</param>
/// <param name="dependantProperty">Dependant property.</param>
/// <typeparam name="TViewModel">The 1st type parameter.</typeparam>
protected void AddRaiseNotifyChangedForPropertyWhenValueIsTheSame <TViewModel>(Expression <Func <object> > property)
{
var propertyName = PropertyNameHelper.GetPropertyName <TViewModel>(property);
_notifyChangeForSameValues.Add(propertyName);
}
/// Returns a value from the viewmodel storage
/// </summary>
/// <returns>The value.</returns>
/// <param name="name">Name.</param>
/// <typeparam name="TValueType">The 1st type parameter.</typeparam>
protected TValueType GetValue <TValueType>(Expression <Func <object> > property, TValueType defaultValue)
{
var propertyName = PropertyNameHelper.GetPropertyName <BaseViewModel> (property);
return(_viewModelStorage.GetObjectForKey <TValueType> (propertyName, defaultValue));
}