datagridview刷新,更新,refresh

http://www.cnblogs.com/fengfeng/archive/2008/03/27/1125225.html

dataGridView的刷新(更新)，Refresh

private DataTable _dtAdd = new DataTable();
private void textBox11_TextChanged(object sender, EventArgs e)
{
    if (textBox11.Text.Trim().Length == 0)
    {
        var dv = new DataView(_dtAdd); //此处是刷新(更新)的重点
        dataGridView1.DataSource = dv;
    }
    else
    {
        _std.Txtchange(textBox11);
        //搜索(查找)请购的物料
        DataView dv = _dtAdd.DefaultView;
        dv.RowFilter = string.Format("物料编码 like '%{0}%' or 物料名称及规格 like '%{1}%'", textBox11.Text.Trim(),textBox11.Text.Trim());
        dataGridView1.DataSource = dv;
    }
}