Add click event to dynamically creatd linkbutton in gridview

Hello
I am working on application which requires to generate dynamic columns in gridview and then bound with linkbutton.
this much is done , but i have to add click event to link button but event is not fired .
below is code which i have tried.
below code is inside rowbound event of gridview.

foreach (DateTime dt in days)
{
LinkButton lb = new LinkButton();

lb.ID = "lb" + i;
lb.Attributes.Add("runat", "server");
lb.Text = r1[dt.Date.ToString("dd-MM-yyyy")].ToString();
lb.CommandName = "UpDate";
lb.Command += lb_Command;
// lb.OnClientClick += new EventHandler(onLinkClick);
// lb.Click += new System.EventHandler(onLinkClick);
// lb.DataBinding += lb_DataBinding;

row.Cells[i + 2].Controls.Add(lb);
i++;
if (dt.Date <= System.DateTime.Today)
{
lb.Enabled = false;
}
}

Try the below code

protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)

    if (e.Row.RowType == DataControlRowType.DataRow)

        var firstCell = e.Row.Cells[1];

        firstCell.Controls.Clear();

        Button btn_Check = new Button();

        btn_Check.ID = "btn_Check";

        btn_Check.Text = firstCell.Text;

        btn_Check.Click += new EventHandler(btn_Check_Click);

        firstCell.Controls.Add(btn_Check);

protected void btn_Check_Click(object sender, EventArgs e)

    Response.Write("btn_Check_Click event called");

}


For detail have a look of the link

http://www.encodedna.com/2014/07/programmatically-add-linkbutton-to-gridview-aspdotnet.htm