/// <summary>
/// 卡查询=>查询按钮
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void button2_Click(object sender, EventArgs e)
{
var data = _cos.KeyCx(txtKey1.Text);
var datainfo = _cos.Str2KeyList(data);
dataGridView1.DataSource = datainfo;
}