WPF DataGridTextColumn包含退格炭

Question

如何 “BS”（别名退格，别名\ b）采用一个数据绑定到一个DataGridTextColumn字符串属性的值：

XAML

<toolkit:DataGridTextColumn Header="K" 
          Width="40" 
          Binding="{Binding Path=Category, Mode=TwoWay, UpdateSourceTrigger=LostFocus}" /> 

C＃

private string category = ""; 
public string Category 
{ 
    get { return category; } 
    set 
    { 
     category = value; 
     OnPropertyChanged("Category"); 
    } 
} 

我已经找到数据库中的条目，然后包含[BS]作为类别的值。在通往数据库的路上，不保证其他代码对属性进行更改。无法在调试过程中重新创建情况，因为我不知道如何在TextBox中显式键入[BS]。只有一个客户可以以某种方式...

你有任何想法如何发生这种情况？ 我试图在财产制定者执行检查，...但我试图找出真正的问题在这里。

Answer 1

我创建了一个小的WPF应用程序，有点重新创建这种情况。 我可以通过从文本编辑器复制并将其粘贴到活动数据网格单元格中，获得一个控制字符，如退格键（ASCII 8,Alt + 0008）。 注：请确保您使用数字键盘的ASCII码

MainWindow.xaml：

<Window 
     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" 
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
     xmlns:local="clr-namespace:BackspaceInGrid" 
     x:Class="BackspaceInGrid.MainWindow" 
     mc:Ignorable="d" 
     Title="MainWindow" Height="350" Width="525"> 
    <StackPanel Orientation="Vertical"> 
     <StackPanel Orientation="Horizontal"> 
      <TextBlock Text="Last Update Category Value: "/> 
      <TextBlock Name="LastUpdateTextBlock"/> 
     </StackPanel> 
     <DataGrid x:Name="MyDataGrid" Height="300" Width="500" DataContext="" AutoGenerateColumns="False"> 
      <DataGrid.Columns> 
       <DataGridTextColumn Header="K" Width="40" 
        Binding="{Binding Category, Mode=TwoWay, UpdateSourceTrigger=LostFocus}"/> 
      </DataGrid.Columns> 
     </DataGrid> 
    </StackPanel> 
</Window> 

MainWindow.xaml.cs：

using System.Collections.ObjectModel; 
using System.ComponentModel; 
using System.Windows; 

namespace BackspaceInGrid 
{ 
    public class Widget : INotifyPropertyChanged 
    { 
     public event PropertyChangedEventHandler PropertyChanged; 

     private string category; 
     public string Category 
     { 
      get { return category; } 
      set 
      { 
       category = value; 
       OnPropertyChanged("Category"); 
      } 
     } 

     protected void OnPropertyChanged(string name) 
     { 
      PropertyChangedEventHandler handler = PropertyChanged; 
      if (handler != null) 
      { 
       handler(this, new PropertyChangedEventArgs(name)); 
      } 
     } 
    } 

    public partial class MainWindow : Window 
    { 
     public void CategoryChangedEvent(object sender, PropertyChangedEventArgs e) 
     { 
      Widget widget = (Widget) sender; 
      string categoryChars = string.Empty; 
      for (int i = 0; i < widget.Category.Length; i++) 
      { 
       char c = widget.Category[i]; 
       if (char.IsControl(c)) 
       { 
        categoryChars = string.Format("{0}char {1} = ASCII({2}), ", categoryChars, i, (int) c); 
       } 
       else 
       { 
        categoryChars = string.Format("{0}char {1} = '{2}', ", categoryChars, i, c); 
       } 
      } 
      LastUpdateTextBlock.Text = categoryChars; 
     } 

     public MainWindow() 
     { 
      InitializeComponent(); 
      ObservableCollection<Widget> widgets = new ObservableCollection<Widget>(); 
      widgets.Add(new Widget { Category = "ABC" }); 

      char [] chars_abc = new char [] { (char) 97, (char) 98, (char) 99 }; 
      char [] chars_ab_back_c = new char [] { (char) 97, (char) 98, (char) 8, (char) 99 }; 

      widgets.Add(new Widget { Category = new string(chars_abc) }); 
      widgets.Add(new Widget { Category = new string(chars_ab_back_c) }); 

      foreach (Widget widget in widgets) 
      { 
       widget.PropertyChanged += CategoryChangedEvent; 
      } 
      MyDataGrid.ItemsSource = widgets; 
     } 
    } 
}