Question

我正面临着WPF DataGrid DataGridTemplateColumn的标签问题。我需要选中两次才能将注意力集中在DataGridTemplateColumn上的控件上。我按照以下方式尝试本网站针对此问题。但我的问题仍未解决。

    <my:DataGrid AutoGenerateColumns="False" Name="dgCB" Margin="8,32,0,0" SelectionMode="Single"                                        GridLinesVisibility="All" FontSize="13" SelectionUnit="Cell" 
    KeyboardNavigation.TabNavigation="Continue" CanUserAddRows="False" CanUserDeleteRows="False" 
    EnableColumnVirtualization="True" VerticalAlignment="Top" 
    RowDetailsVisibilityMode="VisibleWhenSelected" 
    IsSynchronizedWithCurrentItem="True" 
    CanUserSortColumns="False" 
    CanUserReorderColumns="False" 
    CanUserResizeColumns="True" 
    CanUserResizeRows="True"
    HorizontalAlignment="Left" 
    Width="964" 
    Height="416">
    <my:DataGrid.Columns>
    <my:DataGridTemplateColumn Header="Tis">
    <my:DataGridTemplateColumn.CellStyle>
    <Style TargetType="{x:Type DataGridCell}">
  <Setter Property="KeyboardNavigation.IsTabStop" Value="False"/>
  </Style>
 </my:DataGridTemplateColumn.CellStyle>
 <my:DataGridTemplateColumn.CellTemplate>
 <DataTemplate>
 <TextBox Name="txtC" PBOValidation:TextBoxMaskBehavior.Mask="Integer" LostFocus="txtC_LostFocus" Text="{Binding Path=TIME}" GotKeyboardFocus="txtC_GotKeyboardFocus"></TextBox>
 </DataTemplate>
</my:DataGridTemplateColumn.CellTemplate>
</my:DataGridTemplateColumn>
</my:DataGrid.Columns>
</my:DataGrid>

在代码隐藏文件中，我编写了如下的事件处理程序。

private void txtC_GotKeyboardFocus(object sender, KeyboardFocusChangedEventArgs e)
        {
            try
            {
                ((TextBox)sender).SelectAll();
            }
            catch { }
        }

private void txtC_LostFocus(object sender, RoutedEventArgs e)
        {
            if (string.IsNullOrEmpty(((System.Windows.Controls.TextBox)(sender)).Text.Trim()))
            {
                ((System.Windows.Controls.TextBox)(sender)).Text = 0.ToString();
            }
        }

但我的问题仍然没有得到解决，我收到了以下错误：

'DataGridCell'targettype与元素'DataGridCell'
的类型不匹配

请帮我解决我的标签焦点问题。

Answer 1

您应该在DataGrid上定义一个行为，该行为专注于首次点击时点击的单元格。以下行为符合要求：

using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;

/// <summary>
/// Defines a dependency property to allow the dataGridCell to become editable in mouse single click .
/// </summary>
public class DataGridCellSingleClickEditDependency : DependencyObject
{
    /// <summary>
    /// The is allow single click edit property
    /// </summary>
    public static readonly DependencyProperty IsAllowSingleClickEditProperty = DependencyProperty.RegisterAttached("IsAllowSingleClickEdit", typeof(bool), typeof(DataGridCellSingleClickEditDependency), new PropertyMetadata(false, IsAllowSingleClickEditChanged));

    /// <summary>
    /// Gets or sets a value indicating whether this instance is allow single click edit.
    /// </summary>
    /// <value>
    /// <c>true</c> if this instance is allow single click edit; otherwise, <c>false</c>.
    /// </value>
    public bool IsAllowSingleClickEdit
    {
        get
        {
            return (bool)this.GetValue(IsAllowSingleClickEditProperty);
        }

        set
        {
            this.SetValue(IsAllowSingleClickEditProperty, value);
        }
    }

    /// <summary>
    /// Determines whether [is allow single click edit changed] [the specified sender].
    /// </summary>
    /// <param name="sender">The sender.</param>
    /// <param name="e">The <see cref="DependencyPropertyChangedEventArgs"/> instance containing the event data.</param>
    private static void IsAllowSingleClickEditChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
    {
        DataGridCell dataGridCell = sender as DataGridCell;
        if (dataGridCell != null)
        {
            if (e.NewValue.Equals(true))
            {
                dataGridCell.GotFocus += DataGridCellGotFocusHandler;
            }
            else
            {
                dataGridCell.GotFocus -= DataGridCellGotFocusHandler;
            }
        }
    }

    /// <summary>
    /// Finds the visual parent.
    /// </summary>
    /// <typeparam name="T"></typeparam>
    /// <param name="element">The element.</param>
    /// <returns></returns>
    private static T FindVisualParent<T>(UIElement element) where T : UIElement
    {
        UIElement parent = element;
        while (parent != null)
        {
            T correctlyTyped = parent as T;
            if (correctlyTyped != null)
            {
                return correctlyTyped;
            }

            parent = VisualTreeHelper.GetParent(parent) as UIElement;
        }

        return null;
    }

    /// <summary>
    /// Handles the GotFocus event of the AssociatedObject control.
    /// </summary>
    /// <param name="sender">The source of the event.</param>
    /// <param name="e">The <see cref="RoutedEventArgs"/> instance containing the event data.</param>
    private static void DataGridCellGotFocusHandler(object sender, RoutedEventArgs e)
    {
        DataGridCell cell = sender as DataGridCell;
        if (cell != null && !cell.IsEditing && !cell.IsReadOnly)
        {
            if (!cell.IsFocused)
            {
                cell.Focus();
            }

            DataGrid dataGrid = FindVisualParent<DataGrid>(cell);

            if (dataGrid != null)
            {
                dataGrid.BeginEdit(e);
                if (dataGrid.SelectionUnit != DataGridSelectionUnit.FullRow)
                {
                    if (!cell.IsSelected)
                    {
                        cell.IsSelected = true;
                    }
                }
                else
                {
                    DataGridRow row = FindVisualParent<DataGridRow>(cell);
                    if (row != null && !row.IsSelected)
                    {
                        row.IsSelected = true;
                    }
                }
            }
        }
    }
}

现在要附加DataGrid，您可以为DataGridCell

定义键控样式

 <Style x:Key="DataGridCellSingleClickEditStyle" TargetType="{x:Type DataGridCell}">
            <Setter Property="localBehaviors:DataGridCellSingleClickEditDependency.IsAllowSingleClickEdit" Value="True" />
        </Style>

不要在DataGrid上应用设置CellStyle

<DataGrid CellStyle ="{StaticResource DataGridCellSingleClickEditStyle}">
.......
</DataGrid>

WPF Datagrid DataGridTemplateColumn选项卡焦点问题

1 个答案: