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我正在从代码构建一个窗口。我添加了一个标题 TextBlock，然后为 listBox 添加了一些不同的元素，其中每个元素都由 Grid ---> children[0] 一个 TextBlock 来解释什么是元素 ---> children 1一个要输入的 TextBox 或组合框数据。最后一个按钮。

生成后将焦点放在第一个元素（通常是第一个 TextBox）上，以便用户可以立即输入数据。至此，一切正常。

--ADD-- 我忘了说每个元素 = 网格 = 文本块 + 文本框或组合框，都是父列表框的一个元素。所以我想从每个文本框或组合框独立于它们所在的列表框元素移动。

在此处输入图像描述

之后，我希望用户能够通过 TAB 移动到下一个元素（文本框或组合框）。因此，在生成以前的窗口时，我使用计数器并设置

tb.TabIndex = tabIndex++;

或 ComboBox.TabIndex = tabIndex++;

现在的问题是，当我按 TAB 在第一个 TextBox 中输入数据后，插入符号丢失了，所以焦点......

---ADD2--- 这里是代码：

 private void PreparareTraceFieldGrid(ListBox lbTracefields, ObservableCollection<Tuple<string, object, object>> obc, bool IsReadOnly)
 {
        bool IsFocusSet = false;
        /*---TITOLO---*/
        OutlinedTextBlock otbTitle = CreateOtbForTraceFieldInputWindow(Languages.Word(eWords.InsertTracefields));
        lbTracefields.Items.Add(otbTitle);
        /*----CICLO----*/
        int tabIndex = 0;
        foreach (var item in obc)
        {
            Grid gridInternal = new Grid();
            gridInternal.Background = Brushes.Transparent;

            ColumnDefinition cd1 = new ColumnDefinition();
            cd1.Width = new GridLength(300, GridUnitType.Pixel);
            ColumnDefinition cd2 = new ColumnDefinition();
            cd2.Width = new GridLength(1.0, GridUnitType.Star);
            gridInternal.ColumnDefinitions.Add(cd1);
            gridInternal.ColumnDefinitions.Add(cd2);

            OutlinedTextBlock otb = CreateOtbForTraceFieldInputWindow(item.Item1);
            otb.FontSize = easyRunData.OptionsGraphical.FontSize;
            otb.Stroke = new SolidColorBrush(easyRunData.OptionsGraphical.StrokeColour);
            otb.StrokeThickness = easyRunData.OptionsGraphical.StrokeSize;
            Grid.SetColumn(otb, 0);
            gridInternal.Children.Add(otb);

            string strDataType = item.Item2.ToString();
            eTraceFieldDataTypes eDataType = (eTraceFieldDataTypes)Enum.Parse(typeof(eTraceFieldDataTypes), strDataType);

            switch (eDataType)
            {
                case eTraceFieldDataTypes.STRING:
                case eTraceFieldDataTypes.FLOAT:
                case eTraceFieldDataTypes.INTEGER:
                case eTraceFieldDataTypes.STRING_READONLY:
                    TextBox tb = new TextBox();
                    tb.CaretBrush = Brushes.White;
                    tb.FontSize = easyRunData.OptionsGraphical.FontSize;
                    tb.MinWidth = 200;
                    tb.Height = easyRunData.OptionsGraphical.FontSize + 15;
                    tb.VerticalAlignment = VerticalAlignment.Center;
                    tb.Background = Brushes.Transparent;
                    tb.Margin = new Thickness(10);
                    tb.TabIndex = tabIndex++;
                    tb.KeyDown += (senderEvent, args) => { AnalyzeTraceFields_IF_EMPTY(easyRunData.Tracefields.TraceFieldsUser, (Grid)lbTracefields.Parent); };

                    if (eDataType == eTraceFieldDataTypes.STRING_READONLY && !IsReadOnly)
                        tb.BorderBrush = Brushes.Yellow;
                    else
                        tb.BorderBrush = Brushes.Gainsboro;
                    Grid.SetColumn(tb, 1);
                    gridInternal.Children.Add(tb);
                    lbTracefields.Items.Add(gridInternal);
                    if (!IsFocusSet)
                    {
                        tb.Focus();
                        IsFocusSet = true;
                    }
                    break;
                case eTraceFieldDataTypes.BOOL:
                case eTraceFieldDataTypes.BOOL_READONLY:
                    Border brd = new Border();
                    brd.Margin = new Thickness(10);
                    brd.MinWidth = 200;
                    brd.Height = easyRunData.OptionsGraphical.FontSize + 15;
                    if (eDataType == eTraceFieldDataTypes.BOOL_READONLY && !IsReadOnly)
                        brd.BorderBrush = Brushes.Yellow;
                    else
                        brd.BorderBrush = Brushes.Gainsboro;
                    brd.BorderThickness = new Thickness(3);
                    ComboBox cmb = new ComboBox();
                    cmb.VerticalAlignment = VerticalAlignment.Center;
                    cmb.Background = Brushes.Transparent;
                    cmb.Items.Add(Languages.Word(eWords.True));
                    cmb.Items.Add(Languages.Word(eWords.False));
                    cmb.BorderBrush = Brushes.Gainsboro;
                    cmb.BorderThickness = new Thickness(3);
                    cmb.Margin = new Thickness(0);
                    cmb.TabIndex = tabIndex++;
                    cmb.DropDownClosed += (senderEvent, args) => { AnalyzeTraceFields_IF_EMPTY(easyRunData.Tracefields.TraceFieldsUser, (Grid)lbTracefields.Parent); };
                    Grid.SetColumn(brd, 1);
                    brd.Child = cmb;
                    gridInternal.Children.Add(brd);
                    lbTracefields.Items.Add(gridInternal);
                    if (!IsFocusSet)
                    {
                        cmb.Focus();
                        IsFocusSet = true;
                    }
                    break;
                default:
                    break;
            }
}
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