Display dynamically created table

public class CustomeGrid
  {
      private string Table;
      private StringBuilder TableRow;
      private StringBuilder DataColumn;
      private List<CustomeGridColumn> GridColumns;
      private DataTable dataTable;

      public CustomeGrid(DataTable dt)
      {
          //data sould be ordered in the data table
          dataTable = dt;
      }
      private void CreteTableHeader()
      {
          Table = "<table>";
          int index = 0;
          GridColumns = new List<CustomeGridColumn>();
          foreach (DataColumn col in dataTable.Columns)
          {
              Table += "<th>" + col.ColumnName + "</th>";
              GridColumns.Add(new CustomeGridColumn { Index = index, Name = col.ColumnName });
              index++;
          }

      }
      private void CreateRow()
      {
          TableRow = new StringBuilder();
          TableRow.Append("<tr>");
      }
      private void CloseRow()
      {
          TableRow.Append("</tr>");
          Table += TableRow.ToString();
      }
      private void CreateColumn(CustomeGridColumn col)
      {
          SetRowSpan(col);
          DataColumn = new StringBuilder();
          DataColumn.Append("<td #'"+col.Name+"'#>");
          DataColumn.Append("<span>");
      }
      private void CloseColumn()
      {
          DataColumn.Append("</span>");
          DataColumn.Append("</td>");
          TableRow.Append(DataColumn.ToString());
      }
      private void AddData(string data)
      {
          DataColumn.Append(data);
      }
      private void CloseTable()
      {
          Table += "</table>";
          SetRowSpanOnEndOfDataTable();
      }
      private void SetRowSpan(CustomeGridColumn col)
      {
          Table = Table.Replace("#'" + col.Name + "'#", "rowspan='" + col.RowSpan + "'");
      }
      private void SetRowSpanOnEndOfDataTable()
      {
          GridColumns.ForEach(delegate(CustomeGridColumn gc)
          {
              SetRowSpan(gc);
          });

      }

      public string GetHtmlGrid()
      {
          CreteTableHeader();
          foreach (DataRow row in dataTable.Rows)
          {
              CreateRow();
              GridColumns.ForEach(delegate(CustomeGridColumn gc)
              {
                  if (gc.PreviousValue != row[gc.Name].ToString())
                  {
                      CreateColumn(gc);
                      gc.RowSpan = 1;
                      gc.PreviousValue = row[gc.Name].ToString();
                      AddData(row[gc.Name].ToString());
                      CloseColumn();
                  }
                  else
                  gc.RowSpan++;



              });
              CloseRow();
          }
          CloseTable();

          return Table;
      }



  }
  public class CustomeGridColumn
  {
      public int Index { get; set; }
      public string Name { get; set; }
      public string PreviousValue { get; set; }
      public int RowSpan { get; set; }
  }

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initialize the CustomeGrid class with the ordered data table from SQL query
and call the GetHtmlGrid() method in CustomeGrid class and it will =return a html string with the formated html table like the code lines below

 CustomeGrid grid = new CustomeGrid(orderedDataTable);
TableContainer.InnerHtml = grid.GetHtmlGrid();