在WPF MVVM模式下处理TextBox的焦点问题,可以通过以下几种方法实现。以下是具体的步骤和代码示例: 1. 通过扩展控件属性实现 这种方法通过创建一个附加属性(Attached Property)来控制TextBox的焦点。 步骤: 创建附加属性类: csharp public static class FocusExtension { public static readonly DependencyProperty IsFoc...
TextBox tb = e.Source as TextBox; tb.PreviewMouseDown += new MouseButtonEventHandler(OnPreviewMouseDown); } void OnPreviewMouseDown(object sender, MouseButtonEventArgs e) { TextBox tb = e.Source as TextBox; tb.Focus(); e.Handled = true; } void OnGotFocus(object sender, RoutedEventArgs ...
方式1:在窗体的Load事件中去设置焦点,(注意:不能在窗体的构造函数中对TextBox设置焦点,因为此时窗体的Visual还没有初始化): TextBox.Focus();或者键盘的焦点Keyboard.Focus(TextBox); 方式2:在窗体的Load事件中设置一个委托,代码: this.Dispatcher.BeginInvoke(DispatcherPriority.Background, (Action)(() => { ...
textBox3.Focus(); })); } } 方法二,使用LostKeyboardFocus方法: privatevoidtextBox3_LostKeyboardFocus(objectsender, KeyboardFocusChangedEventArgs e) { if(textBox3.Text!="abc") { textBox3.Focus(); } } 说明:在msdn上就查找到: LostKeyboardFocus 在键盘焦点不再位于此元素上时发生 LostFocus 在此...
1.给textarea 增加失去焦点事件,点击按钮后让textarea的focus=’false’ 失去焦点 给textarea 绑定focus <!--/* ***HotApp云笔记,基于HotApp小程序统计云后台 ***免费云后台申请地址 https://weixin.hotapp.cn/cloud ***API 文档地址:https://weixin.hotapp.cn/api ...
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// Select the text in a TextBox when it receives focus. ...
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protected override void OnMouseDown(MouseButtonEventArgs e) { Foo.Focus(); var focusedElement = Keyboard.FocusedElement; } } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 运行程序,先点击 TextBox 设置键盘输入焦点在 TextBox 上。再点击空白的地方 ...
1.利用行为 http://blog.csdn.net/lianchangshuai/article/details/9223125 2. 利用装饰器 http://stackoverflow.com/questions/1345391/set-focus-on-textbox-in-wpf