Enabling pagination on a primary collection

Example of form script code for the page control components:

using System;
using Mongoose.IDO.Protocol;
using Mongoose.Scripting;
using Mongoose.Core.Common;
using System.Diagnostics;

namespace Mongoose.FormScripts
{
   public class TestSinglePage : FormScript
   {
      /// <summary>
      /// Triggered when Go to Page button (Primary Collection) is clicked
      /// </summary>
      public void GotoCurrentPage()
      {
         int pageNum = ThisForm.Variables( "CurrentPageVar" ).GetValue<int>();
         ThisForm.PrimaryIDOCollection.GotoPage( pageNum );
         DisplayCurrentPage( pageNum );
      }

      /// <summary>
      /// Triggered when Go to Next button (Primary Collection) is clicked
      /// </summary>
      public void GotoNextPage()
      {
         int pageNum = ThisForm.Variables( "CurrentPageVar" ).GetValue<int>();
         int maxNumPage = ThisForm.PrimaryIDOCollection.GetNumPages();
         int nextPage = pageNum >= maxNumPage ? maxNumPage : pageNum + 1;

         // Do not proceed if requesting the same page number
         if ( pageNum == nextPage )
            return;

         ThisForm.PrimaryIDOCollection.GotoPage( nextPage );
         DisplayCurrentPage( nextPage );
      }

      /// <summary>
      /// Triggered when Previous button (Primary Collection) is clicked
      /// </summary>
      public void GotoPreviousPage()
      {
         int pageNum = ThisForm.Variables( "CurrentPageVar" ).GetValue<int>();
         int prevPage = pageNum <= 1 ? 1 : pageNum - 1;

         // Do not proceed if requesting the same page number
         if ( pageNum == prevPage )
            return;

         ThisForm.PrimaryIDOCollection.GotoPage( prevPage );
         DisplayCurrentPage( prevPage );
      }

      /// <summary>
      /// Fills up Paging Info, and the Current page of Primary Collection
      /// </summary>
      /// <param name="pageNum"></param>
      public void DisplayCurrentPage( int pageNum )
      {
         ThisForm.Components["CurrentPageEdit"].Value = string.Format( "Page {0} out of {1}", pageNum.ToString(), ThisForm.PrimaryIDOCollection.GetNumPages().ToString() );
         ThisForm.Variables( "CurrentPageVar" ).SetValue( pageNum.ToString() );
      }

      #region SubCollection

      /// <summary>
      /// Triggered when Go to Page button (SubCollection) is clicked
      /// </summary>
      public void GotoCurrentPageSub()
      {
         int pageNum = ThisForm.Variables( "CurrentPageSubVar" ).GetValue<int>();
         ThisForm.PrimaryIDOCollection.GetSubCollection( "Properties", 0 ).GotoPage( pageNum );
         DisplayCurrentPageSub( pageNum );
      }

      /// <summary>
      /// Triggered when Next button (SubCollection) is clicked
      /// </summary>
      public void GotoNextPageSub()
      {
         int pageNum = ThisForm.Variables( "CurrentPageSubVar" ).GetValue<int>();
         int maxNumPage = ThisForm.PrimaryIDOCollection.GetSubCollection( "Properties", 0 ).GetNumPages();
         int nextPage = pageNum >= maxNumPage ? maxNumPage : pageNum + 1;
         ThisForm.PrimaryIDOCollection.GetSubCollection( "Properties", 0 ).GotoPage( nextPage );
         DisplayCurrentPageSub( nextPage );
      }

      /// <summary>
      /// Triggered when Prev button (SubCollection) is clicked
      /// </summary>
      public void GotoPreviousPageSub()
      {
         int pageNum = ThisForm.Variables( "CurrentPageSubVar" ).GetValue<int>();
         int prevPage = pageNum <= 1 ? 1 : pageNum - 1;
         ThisForm.PrimaryIDOCollection.GetSubCollection( "Properties", 0 ).GotoPage( prevPage );
         DisplayCurrentPageSub( prevPage );
      }

      /// <summary>
      /// Fills up Paging Info, and the Current page of Subcollection
      /// </summary>
      public void DisplayCurrentPageSub( int pageNum )
      {
         ThisForm.Components["CurrentPageEditSub"].Value = string.Format( "Page {0} out of {1}",
                                                               pageNum.ToString(),
                                                               ThisForm.PrimaryIDOCollection.GetSubCollection( "Properties", 0 ).GetNumPages().ToString() );
         ThisForm.Components["PageNumberEditSub"].Value = pageNum.ToString();
      }
      #endregion
   }
}