CleanupMetadata 方法
命名空间： Microsoft.Synchronization.Data
程序集： Microsoft.Synchronization.Data（在 Microsoft.Synchronization.Data.dll 中）
语法
声明
Public Overridable Function CleanupMetadata As Boolean
用法
Dim instance As DbSyncProvider
Dim returnValue As Boolean
returnValue = instance.CleanupMetadata()
public virtual bool CleanupMetadata()
public:
virtual bool CleanupMetadata()
abstract CleanupMetadata : unit -> bool
override CleanupMetadata : unit -> bool
public function CleanupMetadata() : boolean
返回值
类型：System. . :: . .Boolean
如果成功地运行了元数据清除，则为 true；否则为 false。
异常
| 异常 | 条件 |
|---|---|
| ObjectDisposedException | 此 DbSyncProvider 已释放。 |
示例
下面的代码示例调用 CleanupMetadata 方法。该代码对提供程序进行实例化，并调用 SampleSyncProvider 类中的 ConfigureDbSyncProvider 方法。所有所需的 DbSyncAdapter 和 DbSyncProvider 属性均在此类中定义。其中包括 SelectMetadataForCleanupCommand 属性。传递给 ConfigureDbSyncProvider 方法的值 7 是以天为单位的元数据保持期。
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