WPF通过模板列将ComboBox绑定到数据库中的字段值

前台代码：

<Window x:Class="WpfApplication16.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:sys="clr-namespace:System;assembly=mscorlib"
        xmlns:local="clr-namespace:WpfApplication16"
        Title="MainWindow" Height="350" Width="525">
    <Window.Resources>
        <ObjectDataProvider x:Key="sexs" ObjectType="{x:Type local:stuControl}" MethodName="getStuSex" >                
        </ObjectDataProvider>     
    </Window.Resources>
    <Grid>
        <DataGrid AutoGenerateColumns="False" Height="200" HorizontalAlignment="Left" Margin="52,48,0,0" Name="dataGrid1" VerticalAlignment="Top" Width="238" CanUserAddRows="False" RowEditEnding="dataGrid1_RowEditEnding">
            <DataGrid.Columns>
                 <DataGridTemplateColumn Header="性别">
                    <DataGridTemplateColumn.CellEditingTemplate>
                        <DataTemplate >
                            <ComboBox ItemsSource="{Binding Source={StaticResource ResourceKey=sexs}}" SelectedItem="{Binding Path=sex}" IsSynchronizedWithCurrentItem="False"/>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellEditingTemplate>
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate >
                            <Label Content="{Binding Path=sex}"></Label>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>
            </DataGrid.Columns>
        </DataGrid>
    </Grid>
</Window>

后台代码：

namespace WpfApplication16
{
    public class stuControl
    {
        private static studentDataContext student = new studentDataContext();

        public static IQueryable<bool?> getStuSex()
        {
            var query = from stu in student.stu
                        select stu.sex;

            return query;
        }

  }

}