SPChangeToken constructor (SPChangeCollection.CollectionScope, Guid, DateTime)

Initializes a new instance of the SPChangeToken class with a specified change collection scope, corresponding object identifier (ID), and change time.

Namespace:  Microsoft.SharePoint
Assembly:  Microsoft.SharePoint (in Microsoft.SharePoint.dll)

Syntax

'Declaration
Public Sub New ( _
    scope As SPChangeCollection.CollectionScope, _
    scopeId As Guid, _
    changeTime As DateTime _
)
'Usage
Dim scope As SPChangeCollection.CollectionScope
Dim scopeId As Guid
Dim changeTime As DateTime

Dim instance As New SPChangeToken(scope, scopeId, _
    changeTime)

public SPChangeToken(
    SPChangeCollection.CollectionScope scope,
    Guid scopeId,
    DateTime changeTime
)

Parameters

• scope
  Type: Microsoft.SharePoint.SPChangeCollection.CollectionScope

  The scope of the change token, which can be a list, Web site, site collection, or content database.

• scopeId
  Type: System.Guid

  The GUID of the scope.

• changeTime
  Type: System.DateTime

  The date and time of a change. Times in the change log are specified in Coordinated Universal Time (UTC) format.

Remarks

Change tokens are specific to a particular list, Web site, site collection, or content database. When you construct a change token, the values that you use in the first two parameters of the constructor should match the object that you are programming against. For example, if you intend to pass the change token to the GetChanges method of an SPList object, you must specify SPChangeCollection.CollectionScope.List as the scope and the value of the list ID property as the scopeId.

Examples

The following example is a console application that constructs two change tokens so that it can query the change log for changes to a site collection during a seven-day period.

using System;
using Microsoft.SharePoint;

namespace Test
{
   class ConsoleApp
   {
      static void Main(string[] args)
      {
         using (SPSite siteCollection = new SPSite("https://localhost"))
         {
            // Create a query.
            SPChangeQuery query = new SPChangeQuery(true, true);

            // Create a change token for the start.
            DateTime startTime = new DateTime(2009, 6, 1);
            query.ChangeTokenStart = new SPChangeToken(SPChangeCollection.CollectionScope.Site,
                                                       siteCollection.ID,
                                                       startTime);
            // Create a change token for the end.
            query.ChangeTokenEnd = new SPChangeToken(SPChangeCollection.CollectionScope.Site,
                                                     siteCollection.ID,
                                                     startTime.AddDays(6));

            // Specify the number of changes per round trip.
            query.FetchLimit = 1000;
            // Keep a running total.
            long total = 0;

            while (true)
            {
               SPChangeCollection changes = siteCollection.GetChanges(query);

               total += changes.Count;

               foreach (SPChange change in changes)
               {
                  Console.WriteLine("\nDate: {0}", change.Time.ToShortDateString());
                  Console.WriteLine("Change subclass: {0}", change.GetType().ToString());
                  Console.WriteLine("Change type: {0}", change.ChangeType);
               }

               // Break out of the loop if we have the last batch.
               if (changes.Count < query.FetchLimit)
                  break;
               // Otherwise, go get another batch.
               query.ChangeTokenStart = changes.LastChangeToken;
            }

            Console.WriteLine("\nTotal changes = {0:#,#}", total);

         }
         Console.Write("\nPress ENTER to continue...");
         Console.ReadLine();
      }
   }
}

Imports System
Imports Microsoft.SharePoint

Module ConsoleApp
   Sub Main()
      Using siteCollection As SPSite = New SPSite("https://localhost")

         ' Create a query
         Dim query As New SPChangeQuery(True, True)

         ' Create a change token for the start.
         Dim startTime As New DateTime(2009, 6, 1)
         query.ChangeTokenStart = New SPChangeToken(SPChangeCollection.CollectionScope.Site, _
                                                    siteCollection.ID, _
                                                    startTime)
         ' Create a change token for the end.
         query.ChangeTokenEnd = New SPChangeToken(SPChangeCollection.CollectionScope.Site, _
                                                  siteCollection.ID, _
                                                  startTime.AddDays(6))

         ' Specify the number of changes per round trip.
         query.FetchLimit = 1000

         ' Keep a running total.
         Dim total As Long = 0


         While True

            Dim changes As SPChangeCollection = siteCollection.GetChanges(query)

            total += changes.Count

            For Each change As SPChange In changes

               Console.WriteLine(vbCrLf + "Date: {0}", change.Time.ToShortDateString())
               Console.WriteLine("Change subclass: {0}", change.GetType().ToString())
               Console.WriteLine("Change type: {0}", change.ChangeType)

            Next change

            ' Break out of loop if we have the last batch.
            If changes.Count < query.FetchLimit Then
               Exit While
            End If

            ' Otherwise, go get another batch.
            query.ChangeTokenStart = changes.LastChangeToken

         End While

         Console.WriteLine(vbCrLf + "Total changes = {0:#,#}", total)

      End Using

      Console.Write(vbCrLf + "Press ENTER to continue...")
      Console.ReadLine()

   End Sub
End Module

See also

Reference

SPChangeToken class

SPChangeToken members

SPChangeToken overload

Microsoft.SharePoint namespace