DataGridColum的bug

Datagrid有多个bug；

1，不支持DynamicResource的东西

2， 在Column隐藏后再显示， ColumnHeader的Tag或者DataContext为null。

解决办法：

用StaticResource ，如下面的  StaticResource   DGC_ContentTemplate；

用DataGridColumnHeader的Column，来取得上层的datacontext。如，  ItemsSource ="{ Binding   Path =Column.Tag,   Converter   ={ StaticResource   DebugConverter },   Mode =OneWay,   RelativeSource ={ RelativeSource       FindAncestor ,   AncestorType ={ x :   Type   DataGridColumnHeader }}}"

   private void InitDataGridBinding (DataGridColumnEx col, string path)

        {

            if ( null == col || String . IsNullOrWhiteSpace ( path ) || null == col . Header )

            {

                return ;

            }

            Binding binding = new Binding ();

            binding . Mode = BindingMode . OneWay ;

            binding . RelativeSource = new RelativeSource ( RelativeSourceMode . Self );

            binding . Converter = new BoolToVisibilityConverter ();

            binding . Path = new PropertyPath ( "(FrameworkElement.DataContext).PACfgVM." + path + ".CfgInfo[" + PAAttachedProperty . GetName ( col ) + "].IsVisiable" );

            BindingOperations . SetBinding ( col , DataGridColumnEx . VisibilityProperty , binding );

            //{for combobox binding in columnHeader

            col . Tag = PAAttachedProperty . GetTag ( col );

            DependencyPropertyDescriptor dpd = DependencyPropertyDescriptor . FromProperty ( DataGridColumnEx . VisibilityProperty , typeof ( DataGridColumnEx ));

            if ( dpd != null )

            {

                dpd . AddValueChanged ( col , delegate

                {

                    //

                    InitDataGridColumnHeader ( col , GetDataGridParent ( col ));

                });

            }

            //}

        }

             <DataTemplate x :Key="DGC_ContentTemplate">

                < TextBlock TextWrapping ="Wrap" Text ="{ Binding }" MinWidth ="20"/>

            </ DataTemplate >

   < Style x : Key ="DataGridColumnHeaderStyle_ComboBox" TargetType ="{ x : Type DataGridColumnHeader }">

                < Setter Property ="ContentTemplate" Value ="{ StaticResource DGC_ContentTemplate }"/>

                < Setter Property ="VerticalContentAlignment" Value ="Center"/>

                                 < Setter Property ="Template">

                                                 < Setter.Value >

                                                                 < ControlTemplate TargetType ="{ x : Type DataGridColumnHeader }">

                            < Grid >

                                                                                                 < StackPanel Orientation ="Vertical" d : LayoutOverrides ="Height" Margin ="10">

                                    < Label Foreground ="Black" HorizontalContentAlignment ="Left" Content ="{ TemplateBinding Content }"/>

                                    <!--<ComboBox Margin="0,10,0,0" ItemsSource="{Binding (FrameworkElement.Column.).TimeSearchGroup, Converter={StaticResource DebugConverter}, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type DataGrid}}}"/>-->

                                    <!--<ComboBox Margin="0,10,0,0"

                                              ItemsSource="{Binding Path=Tag, Converter={StaticResource DebugConverter}, Mode=OneWay, RelativeSource={RelativeSource  FindAncestor, AncestorType={x:Type DataGridColumnHeader}}}"></ComboBox>-->

                                    < ComboBox Margin ="0,10,0,0"

                                              ItemsSource ="{ Binding Path =Column.Tag, Converter ={ StaticResource DebugConverter }, Mode =OneWay, RelativeSource ={ RelativeSource   FindAncestor , AncestorType ={ x : Type DataGridColumnHeader }}}"></ ComboBox >

                                </ StackPanel >                                                                                                        

                                                                                                 < Thumb x : Name ="PART_LeftHeaderGripper" HorizontalAlignment ="Left" Style ="{ StaticResource ColumnHeaderGripperStyle }"/>

                                                                                                 < Thumb x : Name ="PART_RightHeaderGripper" HorizontalAlignment ="Right" Style ="{ StaticResource ColumnHeaderGripperStyle }"/>

                                                                                 </ Grid >

                                                                 </ ControlTemplate >

                                                 </ Setter.Value >

                                 </ Setter >

                < EventSetter Event ="Selector.SelectionChanged" Handler ="ComboBox_SelectionChanged"/>

            </ Style >