Background In our application, we have a screen which hosts several tabs. In each tab, it contains a third-party  GridControl (like the WPF standard GridView control). And we need to display some column cells as hyper link, so user can click on it, v…

silverlight 或WPF在MVVM模式中使用INotifyDataErrorInfo接口对输入进行验证时 控件lostFocus时会触发验证,但在提交动作(例如button的Command)时,不触发 验证.下面的方法提供控件输入验证统一触发. 1.添加ValidationScope类 public class ValidationScope { public FrameworkElement ScopeElement { get; private set; } private read…

<Window x:Class="WpfTest.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008…

//定义接口 public interface IView { bool IsChanged { get; set; } void SetBinding(); void Clear(); } //定义命令 public class ClearCommand : ICommand { public event EventHandler CanExecuteChanged; public bool CanExecute(object parameter) { throw new NotImpleme…

使用CustomControl时绑定Command用法 C# Part public static RoutedUICommand ClearCommand { get; private set; } static CustomControl() { DefaultStyleKeyProperty.OverrideMetadata(typeof(CustomControl), new FrameworkPropertyMetadata(typeof(CustomControl))); Custo…

昨天在项目中遇到一个问题,按钮bind了Command后,利用CanExecute控制它的是否可点击.结果却在初始化viewmodel的时候执行了一次CanExecute,之后一直不触发,按钮的可用性状态也一直不改变.  public DelegateCommand NewCommand { get; set; } public DelegateCommand CheckCommand { get; set; } 看了半天,也没看出啥原因,以为是控件的问题,后来又换成普通的Button,结果还是…

Command="{Binding GoPayCommand}" CommandParameter="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type Window}}}"…

可以调用以下语句通知 CommandManager.InvalidateRequerySuggested();…

What is WPF? WPF (Windows Presentation foundation) is a graphical subsystem for displaying user interfaces, documents, images, movies etc in windows application. What is the need of WPF when we had windows forms? Hide    Copy Code Remember: - ABCDEFG…

应用不只是包含textboxs和labels,还包含actions,如按钮和鼠标事件等.接下来我们加上一些像按钮这样的UI元素来看MVVM类怎么演变的.与之前的UI相比,这次我们加上一个"Cal Tax"按钮,当我们点击这个依赖于“sales amount”的按钮时,它会计算税费并显示在同窗口内. 为了完成所述的功能,我们先在Model类中添加一个CalculateTax的方法.当这个方法被调用时,它根据工资范围来计算税费并把它储存在Tax这个属性中. public class Cus…