c#点一个树节点怎把值传给dataGridView1

请教一下c#点一个树节点怎把值传给dataGridView1
如果是传值给textBox，可以这样写，
string sql = string.Format("select price,color,products_name from products where tid=" + e.Node.Tag, conn);
SqlCommand cmd = new SqlCommand(sql, conn);

                 SqlDataReader cd = cmd.ExecuteReader();
           while (cd.Read())
           {

                     this.textBox2.Text = cd[0].ToString();
                     this.textBox3.Text = cd[1].ToString();this.textBox4.Text = cd[2].ToString(); 

但是dataGridView1的怎写呢？

[code="C#"]
string sql = string.Format("select price,color,products_name from products where tid=" + e.Node.Tag, conn);

SqlCommand cmd = new SqlCommand(sql, conn);

SqlDataReader dr = cmd.ExecuteReader();

DataTable dt=new DataTable();

dt.Load(dr);

dataGridView1.DataSource = dt;

dataGridView1.DataBind();
[/code]

你可以把查询结果放到一个DataTable中，然后把dataGridView1的DataSource=这个DataTable：
[code="C#"]
string sql = string.Format("select price,color,products_name from products where tid=" + e.Node.Tag, conn);
SqlCommand cmd = new SqlCommand(sql, conn);
SqlDataReader dr = com.ExecuteReader();
DataTable dt=new DataTable();
dt.Load(dr);
dataGridView1.DataSource = dt;
dataGridView1.DataBind();

[/code]