Autocompletebox SelectedText Bug

Question

我想綁定自動完成框的SelectedText和SelectedItem屬性，因爲我的客戶端希望能夠輸入文本並從列表中進行選擇。它的工作正常，但...

MainPage有一個DataGrid。當我從網格中選擇一條記錄（即SelectedItem）時，我想將它設置在彈出窗口的自動完成框中。有些時候它可以工作，但有些時候不會。

該怎麼辦？

這是我的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> 

此屬性是在我看來模型和綁定到DataGrid：

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

Answer 1

你不應該使用這兩個功能SelectedText和的SelectedItem在自動完成。它是AutoCompleteBox錯誤.....一個更好的辦法是設置文本和AutoCompleteBox上的GotFocus和LossFocus的可見性。這種方式，你會不由自主地解決問題

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(); 
    }