C#模糊查询绑定datagridview

private CollectionViewSource wgdData = new CollectionViewSource();

private DataTable Ds_wgd
{
get { return
this.dgv_wgd.ItemsSource as DataTable; }
set
{

wgdData.Source = value;

this.dgv_wgd.ItemsSource = ((DataTable)wgdData.Source).DefaultView;

}
}

//文本框修改后，直接会修改

private void txt_jkshm_TextChanged(object sender, TextChangedEventArgs e)

{
(this.wgdData.Source as DataTable).DefaultView.RowFilter
= "jkshm like ‘%" + this.txt_jkshm.Text.Trim() + "%‘ ";
}