如何在asp.net中从数据库中显示datalist中的数据

Question

我有三个表1）经理，2）Teamleader，3）代理。 我想表明有多少经纪人特别是经理，就像我在图像中所示，娜塔莎，奥迪亚都在下本，艾玛在乔尼之下，但两人都在约翰之下。我想在datalist中显示这些代理列表

我使用此代码：

string agent = Session["UserEmail"].ToString();
ArrayList Course = new ArrayList();
string query = "select Email_ID from tblTeamLeaders where IsActive_By='" + agent + "'";
using (SqlCommand cm = new SqlCommand(query, conn))
{
    conn.Open();
    SqlDataReader reader = cm.ExecuteReader();
    while (reader.Read())
    {
        Course.Add(reader.GetString(0));
    }
    conn.Close();
}
foreach (string value in Course)
{
    conn.Open();
    string str = "select DISTINCT name from [tblAgents] where IsActive='True' and IsActive_By='" + value + "'";
    SqlCommand cmd = new SqlCommand(str, conn);
    SqlDataAdapter da = new SqlDataAdapter(cmd);
    DataSet ds = new DataSet();
    da.Fill(ds);
    DataList1.DataSource = ds;
    DataList1.DataBind();
    conn.Close();
}