Telerik RadGridView:当RowDetails中的TextBox达到MaxLength时编辑列值

Question

我有一个使用Telerik RadGridView的Silverlight 5项目。这个RadGridView包含RowDetails，其中包含可编辑的TextBox。如果我在这个TextBox粘贴一些文本几次，直到它达到MaxLength，所选网格行的第一列会自动编辑多余的文本。有人看到并修复了这个吗?

试一试，这里有一些sode:

XAML

<telerik:RadGridView Name="gvMain" AutoGenerateColumns="False">
    <telerik:RadGridView.ChildTableDefinitions>
    <telerik:GridViewTableDefinition />
</telerik:RadGridView.ChildTableDefinitions>
<telerik:RadGridView.Columns>
    <telerik:GridViewDataColumn DataMemberBinding="{Binding Title}" />
    <telerik:GridViewDataColumn DataMemberBinding="{Binding PageCount}" />
</telerik:RadGridView.Columns>
<telerik:RadGridView.HierarchyChildTemplate>
    <DataTemplate>
       <StackPanel Orientation="Horizontal">
           <TextBlock>Name</TextBlock>
           <TextBox Text="{Binding DataContext.Author.Name, RelativeSource={RelativeSource FindAncestor, AncestorType=StackPanel}}" 
                    MaxLength="20" Width="100" />
       </StackPanel>
    </DataTemplate>
</telerik:RadGridView.HierarchyChildTemplate>

public class Author
{
   public string Name { get; set; }
   public string LastName { get; set; }
}
public class Book
{
   public string Title { get; set; }
   public int PageCount { get; set; }
   public Author Author { get; set; }
}

代码后面

this.gvMain.ItemsSource = new List<Models.Book>()
  {
     new Book(){ Author = new Author(){ Name = "John", LastName = "Smith"}, 
                 Title = "Dummy", PageCount = 100}
  }; 

Answer 1

看来，当TextBox或ComboBox在RowDetails不能粘贴文本从剪贴板(当MaxLength达到例如)他们停止处理粘贴事件中继到行本身。插入粘贴的文本

我们实现的解决方案是用自定义文本框替换文本框，这些文本框只有以下附加代码:

protected override void OnKeyDown(KeyEventArgs e)
 {
     if (IsPastingAndClipboardTextIsTooLarge(e.Key))
     {
        int textToFit = (MaxLength - Text.Length + SelectionLength);
        if (textToFit > 0)
        {
           var startIndex = SelectionStart;
           var textToPaste = Clipboard.GetText().Substring(0, Math.Min(textToFit, Clipboard.GetText().Length));
           int caretPosition = startIndex + textToPaste.Length;
           if (SelectionLength > 0)
              Text = Text.Remove(startIndex, SelectionLength);
           Text = Text.Insert(startIndex, textToPaste);
           SelectionStart = caretPosition;
        }
        e.Handled = true;
     }
     else base.OnKeyDown(e);
  }
  public bool IsPastingAndClipboardTextIsTooLarge(Key key)
  {
     return key == Key.V && ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control) &&
            Clipboard.ContainsText() &&
            Text.Length + Clipboard.GetText().Length > MaxLength - SelectionLength;
  } 

但是ComboBoxes也需要一些代码。如果有更好的解决方案，请告诉我!