Hello Dude,
You can create DataTable in code behaind it self just create datatable store value in to datatable and process it
DataTable dt = new DataTable();
dt.Columns.AddRange(new DataColumn[3] { new DataColumn("Id", typeof(int)),
new DataColumn("PageName", typeof(string)),
new DataColumn("PageUrl",typeof(string)) });
dt.Rows.Add(1, "Page1", "Page1.aspx");
dt.Rows.Add(2, "Page2", "Page2.aspx");
dt.Rows.Add(3, "Page3", "Page3.aspx");
dt.Rows.Add(4, "Page4", "Page4.aspx");