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Как сделать view в WPF и не
выстрелить себе в ногу
Антон Оникийчук
Средства
•

(Static|Dynamic)Resources

•

ControlTemplates

•

Style

•

DataTemplates

•

TemplateSelectors
Организация ресурсов
•

MergeDictionary == #include из c++ только без ifdef и pragma
once :(

•

App.xaml == stdafx.h :)

•

Все словари в app.xaml - ваши волосы станут мягкими и
шелковистыми
Key в ResourceDictionary
•

Может быть не только строкой 

Key=«{x:Static loc:StyleNames.SuperStyle}»

Style=«{StaticResource loc:StyleNames.SuperStyle}»

будут работать просто на ура

•

Xaml не покажет warning на переназначение ключа

НЕ ПОЛЬЗУЙТЕСЬ ЭТИМ НИКОГДА
DataTemplate
•

Лучшее место для Binding из ViewModel (в идеале единственное)

•

Определяет общее визуальное дерево для модели данных

•

Лучше чтобы он был 1 на каждый view, а не 1 на каждую модель

•

Не стесняйтесь использовать стили для убирания дублирования в
шаблонах
Style
•

Это как классы

•

Тут есть наследованние BaseOn

•

Старайтесь не переопределять значения заданные в базовых
стилях

•

Не бойтесь иметь много маленьких (как с классами :) )
ControlTemplate
•

Определят как выглядит ваш контрол

•

Желательно не использовать внутри Binding на ViewModel

•

Помните о 

TemplateBinding 

RelativeSource={RelativeSource TemplatedParent}.
UserControl
•

Грузит xaml на каждый new (это ооочччееенннньььь медленно)

•

Нагружает GC

•

Неявный code behind
Выход?
<i:Interaction.Behaviors>
Behaviors
•

Скачать тут - 

https://www.nuget.org/packages/Blend.Interactivity.Wpf

•

Маленькие, хорошо управляемые классы для изменения и дополнения
поведения стандартных контролов

•

Наследуемся от Behavior<TControl>

•

Переопределяем OnAttached и OnDetaching

•

AssociatedObject - наш контрол

•

Для связи с моделью - DependancyProperty у Behavior

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View in wpf

  • 1. Как сделать view в WPF и не выстрелить себе в ногу Антон Оникийчук
  • 3. Организация ресурсов • MergeDictionary == #include из c++ только без ifdef и pragma once :( • App.xaml == stdafx.h :) • Все словари в app.xaml - ваши волосы станут мягкими и шелковистыми
  • 4. Key в ResourceDictionary • Может быть не только строкой 
 Key=«{x:Static loc:StyleNames.SuperStyle}»
 Style=«{StaticResource loc:StyleNames.SuperStyle}»
 будут работать просто на ура • Xaml не покажет warning на переназначение ключа
 НЕ ПОЛЬЗУЙТЕСЬ ЭТИМ НИКОГДА
  • 5. DataTemplate • Лучшее место для Binding из ViewModel (в идеале единственное) • Определяет общее визуальное дерево для модели данных • Лучше чтобы он был 1 на каждый view, а не 1 на каждую модель • Не стесняйтесь использовать стили для убирания дублирования в шаблонах
  • 6. Style • Это как классы • Тут есть наследованние BaseOn • Старайтесь не переопределять значения заданные в базовых стилях • Не бойтесь иметь много маленьких (как с классами :) )
  • 7. ControlTemplate • Определят как выглядит ваш контрол • Желательно не использовать внутри Binding на ViewModel • Помните о 
 TemplateBinding 
 RelativeSource={RelativeSource TemplatedParent}.
  • 8. UserControl • Грузит xaml на каждый new (это ооочччееенннньььь медленно) • Нагружает GC • Неявный code behind
  • 10. Behaviors • Скачать тут - 
 https://www.nuget.org/packages/Blend.Interactivity.Wpf • Маленькие, хорошо управляемые классы для изменения и дополнения поведения стандартных контролов • Наследуемся от Behavior<TControl> • Переопределяем OnAttached и OnDetaching • AssociatedObject - наш контрол • Для связи с моделью - DependancyProperty у Behavior