首先在佈局中新增鍵盤監聽，如下：

<TextBox Keyboard.KeyDown="TextInput_PreviewKeyDown"/>

然後再***.xaml.cs檔案中實現監聽處理規則：

        private bool keydown = false;
        private void TextInput_PreviewKeyDown(object sender, System.Windows.Input.KeyEventArgs e)
        {
            var box = (TextBox)sender;
            if (!keydown)
            {
                keydown = true;
                if (e.Key == Key.Enter)//點選Enter鍵
                {
                    //相關處理事件
                } else if (e.KeyboardDevice.Modifiers == ModifierKeys.Control && e.Key == Key.X) {//剪下
                    var selectedStr = box.SelectedText;
                   
                    if (String.IsNullOrEmpty(selectedStr)) return;
                    try {
                        Dispatcher.Invoke(() =>
                        {
                            var selStartIndex = box.SelectionStart;
                            var remainStr = box.Text.Remove(selStartIndex, selectedStr.Length);
                            box.Text = remainStr;
                            box.SelectionStart = selStartIndex;
                            Clipboard.SetDataObject(selectedStr);
                        });
                        e.Handled = true;
                    } catch (Exception ex) {
                        Console.WriteLine("剪下失敗：" +ex.Message);
                    }

                   
                } else if (e.KeyboardDevice.Modifiers == ModifierKeys.Control && e.Key == Key.C) {//複製
                    var selectedStr = box.SelectedText;
                    if (String.IsNullOrEmpty(selectedStr)) return;
                    try
                    {
                        Dispatcher.Invoke(() =>
                        {
                            Clipboard.SetDataObject(selectedStr);
                        });
                        e.Handled = true;
                    }
                    catch (Exception ex)
                    {
                        Console.WriteLine("複製失敗：" + ex.Message);
                    }
                    
                }
                keydown = false;
            }
        }
 

注意：有的裝置上使用WPF程式的剪下功能會失敗，原因已經有網友整理，這裡給出網友的解釋說明，有興趣可以研究看看：

https://blog.csdn.net/puncha/article/details/8174374

https://www.cnblogs.com/wliu6V/p/3506675.html?utm_source=tuicool