WPF_DataGrid绑定Header

datagrid动态生成列的思路：先枚举所有的，然后把不需要的隐藏了

<DataGridTextColumn Header="{Binding DError}" IsReadOnly="True" Width="60" 
                    Binding="{Binding ERROR4,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" 
                    Visibility="{Binding DataContext.DErrorVisib,Source={StaticResource ProxyElement}}">
    <DataGridTextColumn.HeaderTemplate>
        <DataTemplate>
            <TextBlock Text="{Binding DataContext.DError,UpdateSourceTrigger=PropertyChanged,Mode=TwoWay,
       RelativeSource={RelativeSource AncestorType=DataGrid}}"/>
        </DataTemplate>
    </DataGridTextColumn.HeaderTemplate>
</DataGridTextColumn>

public static readonly DependencyProperty AErrorProperty = DependencyProperty.Register("AError", typeof(string), typeof(AgentExamineFlowViewModel));
public string AError
{
    get
    {
        return (string)GetValue(AErrorProperty);
    }
    set
    {
        SetValue(AErrorProperty, value);
    }
}