protected void Page_Load(object sender, EventArgs e)
    {
        if (!this.IsPostBack)
        {
            //Populating a DataTable from database.
            DataTable dt = this.GetData();

            //Building an HTML string.
            StringBuilder html = new StringBuilder();

            //Table start.
            html.Append("<table border = '1'>");

            //Building the Header row.
            html.Append("<tr>");
            foreach (DataColumn column in dt.Columns)
            {
                html.Append("<th>");
                html.Append(column.ColumnName);
                html.Append("</th>");
            }
            html.Append("</tr>");

            //Building the Data rows.
            foreach (DataRow row in dt.Rows)
            {
                html.Append("<tr>");
                foreach (DataColumn column in dt.Columns)
                {
                    html.Append("<td>");
                    html.Append(row[column.ColumnName]);
                    html.Append("</td>");
                }
                html.Append("</tr>");
            }

            //Table end.
            html.Append("</table>");

            //Append the HTML string to Placeholder.
            PlaceHolder1.Controls.Add(new Literal { Text = html.ToString() });
        }
    }

    private DataTable GetData()
    {

        string webAppConnString = ConfigurationManager.ConnectionStrings["webAppConnString"].ConnectionString;
        using (SqlConnection con = new SqlConnection(webAppConnString))
        {
            con.Open();
            using (SqlCommand cmd = new SqlCommand("SELECT project_ID, user, date_time, projectAction, Comments FROM history;"))
            {
                using (SqlDataAdapter sda = new SqlDataAdapter())
                {
                    cmd.Connection = con;
                    sda.SelectCommand = cmd;
                    using (DataTable dt = new DataTable())
                    {
                        sda.Fill(dt);
                        return dt;
                    }
                }
            }

        }
    }