FileRecordSequence.BaseSequenceNumber 屬性

定義

命名空間:

System.IO.Log

組件:

System.IO.Log.dll

取得目前 中第一個有效記錄的序號。

public:
 property System::IO::Log::SequenceNumber BaseSequenceNumber { System::IO::Log::SequenceNumber get(); };

public System.IO.Log.SequenceNumber BaseSequenceNumber { get; }

member this.BaseSequenceNumber : System.IO.Log.SequenceNumber

Public ReadOnly Property BaseSequenceNumber As SequenceNumber

屬性值

SequenceNumber

對應至 FileRecordSequence 中之有效記錄的最小序號。

實作

BaseSequenceNumber

例外狀況

ObjectDisposedException

已在處置序列之後存取此屬性。

範例

下列範例說明在迴圈中使用 BaseSequenceNumber：

// Read the records added to the log.
    public void ReadRecords()
    {
        Encoding enc = Encoding.Unicode;

        Console.WriteLine();

        Console.WriteLine("Reading Log Records...");
        try
        {
            foreach (LogRecord record in this.sequence.ReadLogRecords(this.sequence.BaseSequenceNumber, LogRecordEnumeratorType.Next))
            {
                byte[] data = new byte[record.Data.Length];
                record.Data.Read(data, 0, (int)record.Data.Length);
                string mystr = enc.GetString(data);
                Console.WriteLine("    {0}", mystr);
            }
        }
        catch (Exception e)
        {
            Console.WriteLine("Exception {0} {1}", e.GetType(), e.Message);
        }

        Console.WriteLine();
    }

' Read the records added to the log. 
    Public Sub ReadRecords()
        Dim enc As Encoding = Encoding.Unicode

        Console.WriteLine()

        Console.WriteLine("Reading Log Records...")
        Try
            For Each record In Me.sequence.ReadLogRecords(Me.sequence.BaseSequenceNumber, LogRecordEnumeratorType.Next)
                Dim data(record.Data.Length - 1) As Byte
                record.Data.Read(data, 0, CInt(Fix(record.Data.Length)))
                Dim mystr As String = enc.GetString(data)
                Console.WriteLine("    {0}", mystr)
            Next record
        Catch e As Exception
            Console.WriteLine("Exception {0} {1}", e.GetType(), e.Message)
        End Try

        Console.WriteLine()
    End Sub

備註

有效的序號會大於或等於 BaseSequenceNumber，而且小於 LastSequenceNumber。 其他所有序號全都無效。

這個屬性的值可藉由呼叫 WriteRestartArea 或 AdvanceBaseSequenceNumber 方法加以變更。