SPWeb.GetChanges method (SPChangeQuery)
取得從做為篩選依據指定的查詢變更記錄檔的變更。
Namespace: Microsoft.SharePoint
Assembly: Microsoft.SharePoint (in Microsoft.SharePoint.dll)
Syntax
'宣告
Public Function GetChanges ( _
query As SPChangeQuery _
) As SPChangeCollection
'用途
Dim instance As SPWeb
Dim query As SPChangeQuery
Dim returnValue As SPChangeCollection
returnValue = instance.GetChanges(query)
public SPChangeCollection GetChanges(
SPChangeQuery query
)
參數
query
Type: Microsoft.SharePoint.SPChangeQuery查詢執行與變更記錄檔。
傳回值
Type: Microsoft.SharePoint.SPChangeCollection
在指定的查詢為基礎的網站上所發生的變更。指定要傳回的查詢參數將FetchLimit屬性設定的變更的最大數目。
備註
使用這個方法來取得特定的物件，而不是所有的物件，或只對選取的動作變更特定的物件上。如需詳細資訊，請參閱SPChangeQuery類別。
.gif "注意事項") 注意事項 |
|---|
根據預設，變更記錄會保留資料的 60 天。若要變更預設的保留期限，請設定ChangeLogRetentionPeriod屬性。 |
Examples
下列範例是主控台應用程式，會建立一個文字檔案已加入、 刪除或更新的清單項目有關的資訊。應用程式會呼叫GetChanges方法，在迴圈中，擷取批次中的變更，直到在擷取所有的變更。
using System;
using System.IO;
using Microsoft.SharePoint;
namespace Test
{
class ConsoleApp
{
static void Main(string[] args)
{
using (SPSite siteCollection = new SPSite("https://localhost"))
{
using (SPWeb webSite = siteCollection.RootWeb)
{
// Construct a query
SPChangeQuery query = new SPChangeQuery(false, // limit object types
false); // limit change types
// object type
query.Item = true;
// change types
query.Add = true;
query.Delete = true;
query.Update = true;
SPTimeZone timeZone = webSite.RegionalSettings.TimeZone;
long total = 0;
string fileName = "ItemChanges.txt";
StreamWriter writer = File.AppendText(fileName);
while (true)
{
SPChangeCollection changes = webSite.GetChanges(query);
total += changes.Count;
foreach (SPChangeItem change in changes)
{
// Get the list title
string listTitle = String.Empty;
string itemName = String.Empty;
SPList list = null;
try
{
list = webSite.Lists[change.ListId];
listTitle = list.Title;
}
catch (SPException)
{
listTitle = "Unknown";
}
// Get the item title
if (list != null)
{
SPListItem item = null;
try
{
item = list.GetItemByUniqueId(change.UniqueId);
itemName = item.Name;
}
catch (ArgumentException)
{
itemName = "Unknown";
}
}
// Write to the log
writer.WriteLine("\r\nDate: {0}",
timeZone.UTCToLocalTime(change.Time).ToString());
writer.WriteLine("Change: {0} item", change.ChangeType);
writer.WriteLine("List: {0}", listTitle);
writer.WriteLine("Item: {0}", itemName);
}
// Break out of loop if we have the last batch
if (changes.Count < query.FetchLimit)
break;
// Otherwise, go get another batch
query.ChangeTokenStart = changes.LastChangeToken;
}
writer.WriteLine("\r\nTotal changes = {0:#,#}", total);
writer.Flush();
writer.Close();
Console.WriteLine("{0} changes written to {1}", total, fileName);
}
}
Console.Write("\nPress ENTER to continue...");
Console.ReadLine();
}
}
}
Imports System
Imports System.IO
Imports Microsoft.SharePoint
Module ConsoleApp
Sub Main()
Using siteCollection As SPSite = New SPSite("https://localhost")
Using webSite As SPWeb = siteCollection.RootWeb
' Construct a query
Dim query As New SPChangeQuery(False, False)
' object type
query.Item = True
' change types
query.Add = True
query.Delete = True
query.Update = True
Dim timeZone As SPTimeZone = webSite.RegionalSettings.TimeZone
Dim total As Long = 0
Dim fileName As String = "ItemChanges.txt"
Dim writer As StreamWriter = File.AppendText(fileName)
While True
Dim changes As SPChangeCollection = webSite.GetChanges(query)
total += changes.Count
For Each change As SPChangeItem In changes
' Get the list title
Dim listTitle As String = String.Empty
Dim itemName As String = String.Empty
Dim list As SPList = Nothing
Try
list = webSite.Lists(change.ListId)
listTitle = list.Title
Catch ex As SPException
listTitle = "Unknown"
End Try
' Get the item title
If list IsNot Nothing Then
Dim item As SPListItem = Nothing
Try
item = list.GetItemByUniqueId(change.UniqueId)
itemName = item.Name
Catch ex As ArgumentException
itemName = "Unknown"
End Try
End If
' Write to the log
writer.WriteLine(vbCrLf + "Date: {0}", _
timeZone.UTCToLocalTime(change.Time).ToString())
writer.WriteLine("Change: {0} item", change.ChangeType)
writer.WriteLine("List: {0}", listTitle)
writer.WriteLine("Item: {0}", itemName)
Next change
' Break out of the loop when we fetch the last batch of changes
If changes.Count < query.FetchLimit Then
Exit While
End If
' Go get another batch of changes starting where we left off
query.ChangeTokenStart = changes.LastChangeToken
End While
writer.WriteLine(vbCrLf + "Total changes = {0:#,#}", total)
writer.Flush()
writer.Close()
Console.WriteLine("{0} changes written to {1}", total, fileName)
End Using
End Using
Console.Write(vbCrLf + "Press ENTER to continue...")
Console.ReadLine()
End Sub
End Module
請參閱
參照
Microsoft.SharePoint namespace