updating a gridview

I'm able to populate a gridview using stored proc from code behind. But can't seem to figure out how to update it. In my rowupdating, I'm trying to get the value of a text box but it always picks up the old value. Please help. Here's my code:

protected void GridView2_RowUpdating(object sender, GridViewUpdateEventArgs e)
        {

                
            
                string labeltable = "Columns";
                int KeyIn;
                KeyIn = Convert.ToInt16(GridView2.DataKeys[e.RowIndex].Value.ToString());

                GridViewRow row = (GridViewRow)GridView2.Rows[e.RowIndex];

                TextBox notestxt = (TextBox)row.FindControl("unotesTextbox") as TextBox;

                string n = string.Empty;

                if (notestxt != null)
                {
                    n = notestxt.Text;
                }



                SqlConnection sqlcon = new SqlConnection(ConfigurationManager.ConnectionStrings["xxxConnectionString"].ConnectionString);
                SqlCommand cmd = new SqlCommand();

                cmd.CommandType = CommandType.StoredProcedure;
                cmd.CommandText = "UpdateNotes";
                cmd.Connection = sqlcon;
                sqlcon.Open();

                try
                {

                    cmd.Parameters.Add("@TableNmIn", SqlDbType.NVarChar).Value = labeltable;
                    cmd.Parameters.Add("@KeyIn", SqlDbType.Int).Value = KeyIn;
                    cmd.Parameters.Add("@NotesIn", SqlDbType.NVarChar).Value = n;

                    GridView2.EditIndex = -1;
                    GridView2.DataBind();
                    cmd.ExecuteNonQuery();
                   
            
                }

                catch (Exception ex)
                {
                    throw ex;
                }

         
        
        }
       
        protected void GridView2_RowEditing(object sender, GridViewEditEventArgs e)
        {

            GridView2.SelectedIndex = -1;
            GridView2.EditIndex = e.NewEditIndex;
          
            GridView2.DataBind();
           
        }