DbSyncProvider.CleanupMetadata 方法

從資料庫中移除變更追蹤中繼資料並更新清除知識，以便反映清除處理序停止的時間點。這可讓您識別過期的節點。

此方法與 CLS 不相容。  

命名空間: Microsoft.Synchronization.Data
組件: Microsoft.Synchronization.Data (在 microsoft.synchronization.data.dll)

語法

'宣告
<SuppressMessageAttribute("Microsoft.Globalization", "CA1303:DoNotPassLiteralsAsLocalizedParameters")> _
Public Overridable Function CleanupMetadata As Boolean
'用途
Dim instance As DbSyncProvider
Dim returnValue As Boolean

returnValue = instance.CleanupMetadata

[SuppressMessageAttribute("Microsoft.Globalization", "CA1303:DoNotPassLiteralsAsLocalizedParameters")] 
public virtual bool CleanupMetadata ()

[SuppressMessageAttribute(L"Microsoft.Globalization", L"CA1303:DoNotPassLiteralsAsLocalizedParameters")] 
public:
virtual bool CleanupMetadata ()

/** @attribute SuppressMessageAttribute("Microsoft.Globalization", "CA1303:DoNotPassLiteralsAsLocalizedParameters") */ 
public boolean CleanupMetadata ()

SuppressMessageAttribute("Microsoft.Globalization", "CA1303:DoNotPassLiteralsAsLocalizedParameters") 
public function CleanupMetadata () : boolean

傳回值

如果成功執行了中繼資料清除，則為 true，否則為 false。

範例

下列程式碼範例會呼叫 CleanupMetadata 方法。此程式碼會具現化提供者，並呼叫 SampleSyncProvider 類別中的 ConfigureDbSyncProvider 方法。所有需要的 DbSyncAdapter 和 DbSyncProvider 屬性都在此類別中定義。其中包括 SelectMetadataForCleanupCommand 屬性。傳遞給 ConfigureDbSyncProvider 方法的值 7 是中繼資料保留期 (以天為單位)。

sampleSyncProvider = new SampleSyncProvider();
DbSyncProvider provider1 = sampleSyncProvider.ConfigureDbSyncProvider(Utility.ConnStr_DbSync1, 7);

if (provider1.CleanupMetadata() == true)
{
    Console.WriteLine(String.Empty);
    Console.WriteLine("Metadata cleanup ran in the SyncSamplesDb_Peer1 database.");
    Console.WriteLine("Metadata more than 7 days old was deleted.");
}
else
{
    Console.WriteLine("Metadata cleanup failed, most likely due to concurrency issues.");
}

sampleSyncProvider = New SampleSyncProvider()
Dim provider1 As DbSyncProvider = sampleSyncProvider.ConfigureDbSyncProvider(Utility.ConnStr_DbSync1, 7)

If provider1.CleanupMetadata() = True Then
    Console.WriteLine([String].Empty)
    Console.WriteLine("Metadata cleanup ran in the SyncSamplesDb_Peer1 database.")
    Console.WriteLine("Metadata more than 7 days old was deleted.")
Else
    Console.WriteLine("Metadata cleanup failed, most likely due to concurrency issues.")
End If

請參閱

參考

DbSyncProvider 類別
DbSyncProvider 成員
Microsoft.Synchronization.Data 命名空間