十万火急！！！望大神指教

再做毕业设计，在WPF窗口中，用DataGrid显示数据列表，显示正常，但是DataGrid里面的行不能选中，不知道为什么。。。用snoop看了下，无论怎么点DataGridRow的IsSelected属性一直是false。。不知为何，求解啊! --------------------编程问答-------------------- 部分代码，供参考，纠结死了
<Style TargetType="{x:Type TextBlock}" x:Key="DataTextBoxStyle" BasedOn="{StaticResource {x:Type TextBlock}}">
            <Setter Property="FontSize" Value="14" />
            <Setter Property="Margin" Value="5,0" />
            <Setter Property="MinWidth" Value="50" />
        </Style>

<DataGrid x:Name="memberList" ItemsSource="{Binding MemberList,ElementName=m_self}" AutoGenerateColumns="False">
                            <DataGrid.Columns>
                                <DataGridTemplateColumn Header="姓名">
                                    <DataGridTemplateColumn.CellTemplate>
                                        <DataTemplate>
                                            <TextBlock Text="{Binding Name}" Style="{StaticResource DataTextBoxStyle}"/>
                                        </DataTemplate>
                                    </DataGridTemplateColumn.CellTemplate>
                                </DataGridTemplateColumn>
                                <DataGridTemplateColumn MaxWidth="50" Header="性别">
                                    <DataGridTemplateColumn.CellTemplate>
                                        <DataTemplate>
                                            <TextBlock Text="{Binding Gender}" Style="{StaticResource DataTextBoxStyle}"/>
                                        </DataTemplate>
                                    </DataGridTemplateColumn.CellTemplate>
                                </DataGridTemplateColumn> --------------------编程问答-------------------- SelectionUnit="FullRow"

补充：.NET技术 ,  C#