Wpf:如何在运行时更改listview中gridview列到数据表的另一列的绑定路径?

下面是一个示例xaml代码:

<listview>
    blah blah blah..
    ......................
    <ListView.View>
        <GridView>
            <GridViewColumn Header="Date" Width="180" DisplayMemberBinding="{Binding Path=Date}" />
            <GridViewColumn Header="Status" Width="80" DisplayMemberBinding="{Binding Path=col1}" />
        </GridView>
    </ListView.View>
</ListView>

这里这个绑定路径DisplayMemberBinding="{绑定路径=日期}
/* Date是绑定*/
的sql数据表的列名。假设这个数据表有3列——col1、col2和col3。我想要的是改变listview的第二列的绑定路径(目前绑定到col1)到col2或col3这个数据表在运行时。这意味着当我运行程序并单击按钮时，listview的第二列将自动更改。

c#代码

        conn = new SqlCeConnection(constr);
        try
        {
            conn.Open();
            string query = "SELECT * FROM " + tablename + "";
            cmd = new SqlCeCommand(query, conn);
            cmd.ExecuteNonQuery();
            SqlCeDataAdapter da = new SqlCeDataAdapter(cmd);
            DataSet ds = new DataSet(tablename);
            da.Fill(ds);
            sview.ItemsSource = ds.Tables[0].DefaultView; //sview is the name of listview
            da.Update(ds);
            conn.Close();
        }

public class MyModel
{
    public string Property1 { get; set; }
    public string Property2 { get; set; }
}
public class MyViewModel : INotifyPropertyChanged
{
    private readonly MyModel _model;
    private bool _displayProperty1;
    public MyViewModel(MyModel model)
    {
        _model = model;
    }
    public bool DisplayProperty1 
    { 
        get { return _displayProperty1; }
        set
        {
            _displayProperty1 = value;
            OnPropertyChanged("DisplayProperty1");
            OnPropertyChanged("PropertyToDisplay");
        }
    }
    public string PropertyToDisplay 
    { 
        get
        {
            return DisplayProperty1 ? _model.Property1 : _model.Property2;
        }
    }
}

<GridViewColumn Header="Status" Width="80" DisplayMemberBinding="{Binding PropertyToDisplay}" />