.net cf在焦点上显示键盘的TextBox

我的UI上有一些文本框，我想在控件有焦点时显示移动键盘，然后消失。

注意：对于此特定程序，它是一个高屏幕，设备上没有物理键盘。

Answer 1

将InputPanel添加到表单，连接TextBox的GotFocus和LostFocus事件，并在事件处理程序中显示/隐藏输入面板：

private void TextBox_GotFocus(object sender, EventArgs e) { SetKeyboardVisible(true); } private void TextBox_LostFocus(object sender, EventArgs e) { SetKeyboardVisible(false); } protected void SetKeyboardVisible(bool isVisible) { inputPanel.Enabled = isVisible; } 

更新

回应ctacke的完整性要求; 这是连接事件处理程序的示例代码。 通常我会使用设计器（选择文本框，显示属性网格，切换到事件列表并让环境设置GotFocus和LostFocus处理程序），但如果UI包含多个文本框，您可能希望使其更加自动化。

下面的类公开了两个静态方法，AttachGotLostFocusEvents和DetachGotLostFocusEvents; 他们接受ControlCollection和两个事件处理程序。

 internal static class ControlHelper { private static bool IsGotLostFocusControl(Control ctl) { return ctl.GetType().IsSubclassOf(typeof(TextBoxBase)) || (ctl.GetType() == typeof(ComboBox) && (ctl as ComboBox).DropDownStyle == ComboBoxStyle.DropDown); } public static void AttachGotLostFocusEvents( System.Windows.Forms.Control.ControlCollection controls, EventHandler gotFocusEventHandler, EventHandler lostFocusEventHandler) { foreach (Control ctl in controls) { if (IsGotLostFocusControl(ctl)) { ctl.GotFocus += gotFocusEventHandler; ctl.LostFocus += lostFocusEventHandler ; } else if (ctl.Controls.Count > 0) { AttachGotLostFocusEvents(ctl.Controls, gotFocusEventHandler, lostFocusEventHandler); } } } public static void DetachGotLostFocusEvents( System.Windows.Forms.Control.ControlCollection controls, EventHandler gotFocusEventHandler, EventHandler lostFocusEventHandler) { foreach (Control ctl in controls) { if (IsGotLostFocusControl(ctl)) { ctl.GotFocus -= gotFocusEventHandler; ctl.LostFocus -= lostFocusEventHandler; } else if (ctl.Controls.Count > 0) { DetachGotLostFocusEvents(ctl.Controls, gotFocusEventHandler, lostFocusEventHandler); } } } } 

表单中的用法示例：

 private void Form_Load(object sender, EventArgs e) { ControlHelper.AttachGotLostFocusEvents( this.Controls, new EventHandler(EditControl_GotFocus), new EventHandler(EditControl_LostFocus)); } private void Form_Closed(object sender, EventArgs e) { ControlHelper.DetachGotLostFocusEvents( this.Controls, new EventHandler(EditControl_GotFocus), new EventHandler(EditControl_LostFocus)); } private void EditControl_GotFocus(object sender, EventArgs e) { ShowKeyboard(); } private void EditControl_LostFocus(object sender, EventArgs e) { HideKeyboard(); } 

Answer 2

使用InputPanel类 。 在获得焦点时启用它，在失去焦点时禁用它。