Binding dropdownlist inside gridview edititemtemplate

Question

I\'m not able to bind my dropdownlist present in edititem template . I am getting null reference when i try to access it.

My design:

Answer 1

protected void gvProject_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        try
        {
            string Active = "";
            if (e.Row.DataItem != null)
            { 
                if ((e.Row.RowState & DataControlRowState.Edit) > 0)
                {
                    Label lblEditActive = (Label)e.Row.FindControl("lblUP_ET_ActiveStatus");
                    if (lblEditActive.Text != string.Empty)
                    {
                        Active = lblEditActive.Text.Trim();
                    }

                    DropDownList ddlActive = (DropDownList)e.Row.FindControl("ddlUP_ET_ActiveStatus");
                    ddlActive.Items.Clear();
                    ddlActive.Items.Add("True");
                    ddlActive.Items.Add("False"); 
                    ddlActive.DataBind(); 
                    ddlActive.Items.FindByText(Active).Selected = true;
                }
            }
        }
        catch (Exception ex)
        {
            throw ex;
        }
    }