I am continuing from this post.

After much Googling, I have come up with this code to edit cells programmatically:

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

using Ice_Web_Portal.BO;

namespace GridView___Test
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            GridView1.DataSource = Course.GetCourses();
            GridView1.DataBind();
        }

        protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
        {
            GridViewRow row = GridView1.Rows[e.NewEditIndex];

            GridView1.EditIndex = e.NewEditIndex;

            GridView1.DataSource = Course.GetCourses();
            GridView1.DataBind();
        }

        protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
        {
            TextBox txtID = (TextBox)GridView1.Rows[e.RowIndex].Cells[1].Controls[0];
            TextBox txtCourseCode = (TextBox)GridView1.Rows[e.RowIndex].Cells[2].Controls[0];
            TextBox txtCourseName = (TextBox)GridView1.Rows[e.RowIndex].Cells[3].Controls[0];
            TextBox txtCourseTextBookCode = (TextBox)GridView1.Rows[e.RowIndex].Cells[4].Controls[0];

            Course item = new Course();
            item.ID = Convert.ToInt32(txtID.Text);
            item.CourseCode = txtCourseCode.Text;
            item.CourseName = txtCourseName.Text;
            item.TextBookCode = txtCourseTextBookCode.Text;

            bool success = Course.Update(item);

            labMessage.Text = success.ToString();

            GridView1.EditIndex = -1;
            GridView1.DataSource = Course.GetCourses();
            GridView1.DataBind();
        }
    }
}

But 2 problems are happening.

(1) I need to press command buttons twice to Edit/Update.

(2) Changes in the cell values are not updated in the database. I.e. edited cell values are not committing.

Can anyone give me a solution?