可是这个过程稍微不够流畅,我希望点击 Sign In 按钮后,数据验证错误的控件自动获得焦点,像下面这个 gif 那样: 这个需求在使用 CodeBehind 的场景很容易实现,但 MVVM 模式就有点难,因为 ViewModel 应该不能直接调用 View 上的任何元素的函数。 如果可以的话,最好通过 ViewModel 上的属性控制UI元素,让这个 UI 元素...
context.Customers.Load(); // After the data is loaded, call the DbSet<T>.Local property // to use the DbSet<T> as a binding source. custViewSource.Source = context.Customers.Local; } 按F5。 您應該會看到第一個擷取到 CollectionViewSource 的客戶詳細數據。 您也應該在...
选项1:使用 Code First 定义模型本部分演示如何使用 Code First 创建模型及其关联的数据库。 如果想要使用 Database First 通过 EF Designer 从数据库对模型实施反向工程,请跳到下一部分(选项 2:使用 Database First 定义模型)使用Code First 开发时,通常先编写定义概念(域)模型的 .NET Framework 类。
使用Code First 开发时,通常先编写定义概念(域)模型的 .NET Framework 类。 向WPFwithEFSample添加一个新类: 右键单击项目名称 依次选择“添加”、“新建项” 选择“类”并输入 Product作为类名 将Product类定义替换为以下代码: C#复制 namespaceWPFwithEFSample{publicclassProduct{publicintProductId {get;set; ...
.GetValue(SelectorDragDropProperty)asSelectorDragDrop;if(selectorDragDrop!=null)selectorDragDrop.Selector=null;if(b==false){selector?.SetValue(SelectorDragDropProperty,null);return;}selector?.SetValue(SelectorDragDropProperty,newSelectorDragDrop(selector));}}...
DependencyProperty.Register("CodeText",typeof(string),typeof(AvalonEditBehaviour),newFrameworkPropertyMetadata(default(string), FrameworkPropertyMetadataOptions.BindsTwoWayByDefault, PropertyChangedCallback));publicstringCodeText {get{return(string)GetValue(CodeTextProperty); }set{ SetValue(CodeTextProperty,value...
In this article Accessing resources from code Creating resources with code Using objects as keys See also Additional resources Training Module Design consistent .NET MAUI XAML pages by using shared resources - Training Learn how to use static and dynamic shared resources to build a .NET Multi-platf...
Code Fragments Code fragment editing is useful in situations such as where you want an end user to only see and edit the contents of a specific method or property, or perhaps only a certain statement or expression. When using any language that has a parser, this type of editing is easily...
The bit that makes all the magic happen is the setter on the Model property in the view's code-behind: public IStatusBarPresentationModel Model { set { this.DataContext = value; } } Now, all the various bindable bits on our presenter are available within the DataContext of the view, pri...
public class DesignerItemDecorator : Control { private Adorner adorner; public bool ShowDecorator { get { return (bool)GetValue(ShowDecoratorProperty); } set { SetValue(ShowDecoratorProperty, value); } } public static readonly DependencyProperty ShowDecoratorProperty = DependencyProperty.Register ("Show...