DataGridComboBoxColumn 不显示绑定和选中的项

Zhang_Yunan 2017-01-09 11:27:06

现在有一个DataGrid，绑定到curveSetWin窗口的CurveSettingList

    <DataGrid ItemsSource="{Binding CurveSettingList,ElementName=curveSetWin}"

                  AutoGenerateColumns="False" IsReadOnly="False" CanUserSortColumns="False"

                  CanUserAddRows="False" CanUserDeleteRows="False"

                  LoadingRow="dataGrid_LoadingRow" AlternationCount="2">

            <DataGrid.Columns>

                <DataGridTextColumn Header="{DynamicResource curveName}" MinWidth="60" Binding="{Binding CurveName}" ElementStyle="{StaticResource dgCell}" HeaderStyle="{StaticResource dgHeader}" Width="*"></DataGridTextColumn>

                <DataGridComboBoxColumn Header="{DynamicResource lineThickness}" MinWidth="60"

                                        TextBinding="{Binding LineThickness}"

                                        SelectedItemBinding="{Binding LineThickness,UpdateSourceTrigger=PropertyChanged}"

                                        ElementStyle="{StaticResource dgComboBoxCell}"

                                        HeaderStyle="{StaticResource dgHeader}" Width="*">

                    <DataGridComboBoxColumn.ItemsSource>

                        <col:ArrayList>

                            <sys:String>1</sys:String>

                            <sys:String>2</sys:String>

                            <sys:String>3</sys:String>

                            <sys:String>4</sys:String>

                            <sys:String>5</sys:String>

                            <sys:String>6</sys:String>

                            <sys:String>7</sys:String>

                            <sys:String>8</sys:String>

                            <sys:String>9</sys:String>

                            <sys:String>10</sys:String>

                        </col:ArrayList>

                    </DataGridComboBoxColumn.ItemsSource>

                </DataGridComboBoxColumn>

                <DataGridComboBoxColumn Header="{DynamicResource lineColor}" MinWidth="60" 

                                        ItemsSource="{Binding Source={StaticResource colorBrushes}}"

                                        SelectedValueBinding="{Binding LineColor, Converter={StaticResource color2RectangleConverter}}"

                                        SelectedItemBinding="{Binding LineColor, Converter={StaticResource color2RectangleConverter}, UpdateSourceTrigger=PropertyChanged}"

                                        HeaderStyle="{StaticResource dgHeader}" Width="*">

                </DataGridComboBoxColumn>

            </DataGrid.Columns>

        </DataGrid>

colorBrushes如下：

 <ObjectDataProvider MethodName="GetType" 

                            ObjectType="{x:Type sys:Type}" x:Key="colorsTypeOdp">

            <ObjectDataProvider.MethodParameters>

                <sys:String>System.Windows.Media.Colors, PresentationCore,

            Version=3.0.0.0, Culture=neutral, 

            PublicKeyToken=31bf3856ad364e35</sys:String>

            </ObjectDataProvider.MethodParameters>

        </ObjectDataProvider>

        <ObjectDataProvider ObjectType="{x:Type local:GetBrushes}"  

                            MethodName="GetRectangles" x:Key="colorBrushes">

            <ObjectDataProvider.MethodParameters>

                <ObjectDataProvider ObjectInstance="{StaticResource colorsTypeOdp}"  

                            MethodName="GetProperties">

                </ObjectDataProvider>

            </ObjectDataProvider.MethodParameters>

        </ObjectDataProvider>

GetBrushes如下

public class GetBrushes

    {

        public List<Rectangle> GetRectangles(ObjectDataProvider PropertyName)

        {

            List<Rectangle> result = new List<Rectangle>();

            PropertyInfo[] pi = PropertyName.Data as PropertyInfo[];

            foreach (var item in pi)

            {

                Rectangle newRect = new Rectangle();

                newRect.Fill = new SolidColorBrush((Color)ColorConverter.ConvertFromString(item.Name));

                newRect.Height = 20;

                newRect.Width = 60;

                newRect.Margin = new Thickness(0);

                result.Add(newRect);

            }

            return result;

        }

    }

绑定的效果如下

curveName列和lineThickness是可以正确绑定的。lineColor列是根据ObjectDataProvider 提供的Rectangle显示颜色选择器。它的选项也可以填充各种颜色，但是在加载时lineColor列不显示相应的颜色，选中时再点击空白的地方也会消失。
哪位大神知道是怎么回事，DisplayMemberPath设置了也不好使。

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