Autocompletebox SelectedText Bug

Question

我想绑定AutocompleteBox 的SelectedText和SelectedItem属性,因为我的客户端希望能够输入文本并从列表中进行选择.它运作正常,但......

MainPage有一个DataGrid.当我从Grid中选择一条记录(即SelectedItem)时,我想在弹出窗口的AutocompleteBox中设置它.有时它可以工作,但有时却没有.

我该怎么办这个问题？

这是我的XAML:

<Sdk:AutoCompleteBox Grid.Column="3" Grid.Row="3" Height="18" Width="150" 
     IsTextCompletionEnabled="True" TabIndex="9" HorizontalAlignment="Left"

     Text="{Binding ElementName=ResEdit,Path=DataContext.SelectedDemoText,Mode=TwoWay}"
     ItemsSource="{Binding ElementName=ResEdit,Path=DataContext.DemoList,Mode=OneWay}"
     ItemTemplate="{StaticResource DemoTemplate}"
     ValueMemberPath="DemoCode" 
     LostFocus="AutoCompleteBox_LostFocus"
     Margin="0,0,21,0" Padding="0">
  </Sdk:AutoCompleteBox>

此属性在我的视图模型中并绑定到DataGrid:

public InvoicesDTO SelectedInvoice
{
    get { return _selectedInvoice; }
    set
    {
        SelectedInvoice = value;
        SelectedDomoText = SelectedInvoice.DemoText.Trim();
        RaisePropertyChanged("SelectedInvoice");
    }
}

Answer 1

您不应在autocomplete中同时使用SelectedText和SelectedItem函数。这是AutoCompleteBox的一个bug ......更好的方法是在GotFocus和LossFocus上设置文本框和AutoCompleteBox的可见性。这样你就能坚决解决你的问题

 private void DemoAutoComplete_LostFocus(object sender, RoutedEventArgs e)
            {
                DemoTextBox.Visibility = Visibility.Visible;
                DemoAutoComplete.Visibility = Visibility.Collapsed;
                DemoTextBox.Text = OCRAutoComplete.Text;

                ((DemoVM)this.DataContext).SelectedDemoText = DemoAutoComplete.Text;
            }



private void DemoTextBox_GotFocus(object sender, RoutedEventArgs e)
    {
        DemoAutoComplete.Text = OctTextBox.Text;
        DemoTextBox.Visibility = Visibility.Collapsed;
        DemoAutoComplete.Visibility = Visibility.Visible;
        DemoAutoComplete.Focus();
    }