释放FileInfo()

Question

 Dim FolderName As New IO.DirectoryInfo(FileLocationFolder)
 Dim diar1 As IO.FileInfo() = FolderName.GetFiles("*.xml")

我正在循环遍历diar1，如下所示

 For Each CurrFile In diar1
 Next 

那能锁定那个目录中的所有文件吗？

如果是的话，我做完后该如何处理呢？任何帮助都将不胜感激。

下面是我剩下的代码：

Public Sub Get_FTP_video(ByVal curr As Integer)
    Try

        Dim FolderName As New IO.DirectoryInfo(FileLocationFolder)
        Dim diar1 As IO.FileInfo() = FolderName.GetFiles("*.xml")

        Dim CurrFile As IO.FileInfo
        Dim CurrfileName As String
        Dim currsize, MinSize As Integer
        currsize = 0
        MinSize = 0

        For Each CurrFile In diar1
            CurrfileName = CurrFile.Name

            If CurrFile.CreationTime.Date = Today.Date Then
                GET_FileName(FileLocationFolder & CurrfileName, currsize)
                If MinSize = 0 Then
                    MinSize = currsize
                Else
                    If currsize < MinSize Then
                        splitter = CurrFile.Name.Split(".")
                        If My.Computer.FileSystem.FileExists(FileLocationFolder & splitter(0).ToString & ".mp4") Then
                            MinSize = currsize
                            newVideoName = splitter(0).ToString
                        End If
                    End If
                End If
            End If
        Next

        System.IO.File.Move(FileLocationFolder & videonamee & ".mp4", MoveFileToFolder & videonamee)
        sendmessage = True

        MoveAllFilesToBin()

     Catch ex As System.Data.SqlClient.SqlException
     Catch ex As Exception 
     End Try
End Sub

‘

Public Sub GET_FileName(ByVal directorytracer As String, ByRef fileSize As Integer)
        Try
            Dim xmldoc As New XmlDataDocument()
            Dim mmm As New XmlDataDocument
            Dim xmlnode As XmlNodeList
            Dim i As Integer
            Dim str As String
            Dim fs As New FileStream(directorytracer, FileMode.Open, FileAccess.Read)
            xmldoc.Load(fs)
            Dim ds As New DataSet
            Dim xmlNodeRdr As XmlNodeReader
            xmlnode = xmldoc.GetElementsByTagName("item")

            For i = 0 To xmlnode.Count - 1
                str = xmlnode(i).ChildNodes.Item(3).InnerXml
                mmm.InnerXml = str
                xmlNodeRdr = New XmlNodeReader(mmm)
                ds.ReadXml(xmlNodeRdr)
                fileSize = CInt(ds.Tables(0).Rows(0).Item(0).ToString)
            Next

        Catch ex As System.Data.SqlClient.SqlException

        Catch ex As Exception

        End Try

    End Sub

。

此函数中发生错误：

Sub MoveAllFilesToBin()
    Try
        Dim FolderName As New IO.DirectoryInfo(FileLocationFolder)
        Dim diar1 As IO.FileInfo() = FolderName.GetFiles()
        For Each CurrFile In diar1
            If System.IO.File.Exists(BinFolderFTP & CurrFile.Name) Then
                System.IO.File.Delete(BinFolderFTP & CurrFile.Name)
            End If
            System.IO.File.Move(FileLocationFolder & CurrFile.Name, BinFolderFTP & CurrFile.Name)
        Next

        Catch ex As System.Data.SqlClient.SqlException
        Catch ex As Exception
    End Try
End Sub

。

The process cannot access the file because it is being used by another process.
   at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
   at System.IO.__Error.WinIOError()
   at System.IO.File.Move(String sourceFileName, String destFileName)

Answer 1

在GET_FileName中，一个FileStream是打开的，既不关闭也不释放。最简单的解决方案是用一个Using块包装您的FileStream使用。您可能可以在创建FileStream时启动该块，并在xmldoc.Load(fs)之后结束它，因为在此之后不再需要它。这与实现IDisposable的任何事情都有很好的关系。

Answer 2

创建FileInfo对象不会打开或锁定文件，因此没有什么可关闭或解锁的。FileInfo没有实现IDisposable，所以没有什么可处理的。您不需要做任何特殊的事情，对象将在没有对它们的引用之后被垃圾收集。