How To Bind Data In Data GridView ?

protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {   
                Bind();
        }

    }  


public void Bind()
   {

       setConnectionString();

       query = "select * from userinfo";
       //Session["GridView1"] = EmpBal.bindgridBAL(query, conString);
       DataSet ds = EmpBal.bindgridBAL(query, conString);
       GridView1.DataSource = ds;
       GridView1.DataBind();

   }

public DataSet bindgridDAL(string query, string conString) 
    
    {
     try
        {
            SqlDataAdapter da = new SqlDataAdapter(query,conString);
            ds = new DataSet();
            da.Fill(ds, "EmpDetail");
            da.Dispose();
        }
        catch (Exception ex)
        {
            throw ex;
        }
     return ds;
    }

Public DataSet bindgridBAL(string query, string conString)
    {
        try
        {
            return empDAL.bindgridDAL(query, conString);
        }
        catch (Exception ex)
        {
            throw ex;
        }
     }