ASP.NET - working with GridView Programmatically

Question

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;
u         


        

Answer 1

//To Add Esit,Update,Cancel in gridview control ..... 
//source 
<asp:CommandField ShowEditButton="True" HeaderText="Edit Product Name &amp; Price" />

//c# code
  public void gris()
        {
            con.Open();
            SqlDataAdapter da = new SqlDataAdapter();
            da.SelectCommand = new SqlCommand("select * from Product_details", con);
            DataSet ds = new DataSet();
            da.Fill(ds);
            Gridview1.DataSource = ds;
            Gridview1.DataBind();
            con.Close();
        }
 protected void Gridview1_RowEditing(object sender, GridViewEditEventArgs e)
        {
            Gridview1.EditIndex = e.NewEditIndex;
            gris();
        }

        protected void Gridview1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
        {
            Gridview1.EditIndex = -1;
            gris();
        }

        protected void Gridview1_RowUpdating(object sender, GridViewUpdateEventArgs e)
        {
            string id = addproduct2.DataKeys[e.RowIndex].Value.ToString();
            string name = ((TextBox)addproduct2.Rows[e.RowIndex].Cells[1].Controls[0]).Text;//(or)Controls[1]
            string rate = ((TextBox)addproduct2.Rows[e.RowIndex].Cells[4].Controls[0]).Text;//(or)Controls[1]
            con.Open();
            cmd = new SqlCommand("update Product_details set product_name='" + name + "',Product_rate='" + rate + "',product_unitprice='" + rate + "' where product_id='" + id + "'", con);
            int i = cmd.ExecuteNonQuery();
            if (i >= 1)
            {
                Response.Write("Updated");
            }
            con.Close();
            Gridview1.EditIndex = -1;
            gris();

        }

Answer 2

for problem #1,try

    protected void Page_Load(object sender, EventArgs e)
    {
        if(!Page.IsPostBack)
        {
        GridView1.DataSource = Course.GetCourses();
        GridView1.DataBind();
        }
    }

for problem #2, we need to check your method Course.Update(item) .