本文整理汇总了VB.NET中System.IO.Log.FileRegion类的典型用法代码示例。如果您正苦于以下问题：VB.NET FileRegion类的具体用法？VB.NET FileRegion怎么用？VB.NET FileRegion使用的例子？那么, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了FileRegion类的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的VB.NET代码示例。
示例1: LogBackup
Friend Class LogBackup
Private Shared Sub ArchiveToXML(ByVal logStore As LogStore, ByVal fileName As String)
Dim snapshot As LogArchiveSnapshot = logStore.CreateLogArchiveSnapshot()
Dim writer As New XmlTextWriter(fileName, System.Text.Encoding.ASCII)
writer.WriteStartElement("logArchive")
For Each region As FileRegion In snapshot.ArchiveRegions
With writer
.WriteStartElement("fileRegion")
.WriteElementString("path", region.Path)
.WriteElementString("length", region.FileLength.ToString())
.WriteElementString("offset", region.Offset.ToString())
End With
Using dataStream As Stream = region.GetStream()
Dim data(dataStream.Length - 1) As Byte
dataStream.Read(data, 0, data.Length)
writer.WriteElementString("data", System.Convert.ToBase64String(data))
End Using
writer.WriteEndElement()
Next region
writer.Close()
logStore.SetArchiveTail(snapshot.LastSequenceNumber)
End Sub
Private Shared Sub RestoreFromXML(ByVal fileName As String)
Using reader As New XmlTextReader(fileName)
reader.ReadStartElement("logArchive")
Do While reader.IsStartElement()
Dim path As String
Dim length As Long
Dim offset As Long
path = reader.ReadElementString("path")
length = System.Int64.Parse(reader.ReadElementString("length"))
offset = System.Int64.Parse(reader.ReadElementString("offset"))
Dim dataString = reader.ReadElementString("data")
Dim data() = System.Convert.FromBase64String(dataString)
Dim fileStream As FileStream
fileStream = New FileStream(path, FileMode.OpenOrCreate, FileAccess.Write)
Using fileStream
fileStream.SetLength(length)
fileStream.Position = offset
fileStream.Write(data, 0, data.Length)
End Using
Loop
reader.ReadEndElement()
End Using
End Sub
End Class