按照下面那个链接封装 进行select怎么显示到datgridview

https://www.cnblogs.com/li-jun-wei/p/8068076.html

private void button1_Click(object sender, EventArgs e)
{
sql a = new sql();
string str = "select * from kcb";
a.Select(str);

        this.dataGridView1.DataSource = ;


    }

this.dataGridView1.DataSource = a.Select(str).Tables[0];