Question

我将我的应用程序更改为多线程应用程序。当我进行多线程处理时，由于尝试从多个线程读取文件的一个或多个应用程序出现错误Process cannot read the file because it's being use by another process.

，因此读取文件时出现问题

这是我用来读取文件的类：

Imports System.Xml.Serialization
Imports System.IO

Public Class EmailSerializer
    Public EmailConfig As New EmailConfig
    Private ReadOnly _configPath As String = String.Empty

    Public Sub New()
    End Sub

    Public Sub New(configPath As String)
        _configPath = configPath
    End Sub

    Public Sub Add(emailConfig As EmailConfig)
        Me.EmailConfig = emailConfig
    End Sub

    Public Function GetEmail() As EmailConfig
        Return EmailConfig
    End Function

    Public Function GetSmtPip() As String
        Return EmailConfig.Smtpip
    End Function

    Public Function Load(configPath As String) As EmailSerializer
        Dim result As EmailSerializer
        Dim streamReaderInstance As StreamReader
        If (File.Exists(configPath)) Then
        streamReaderInstance = New StreamReader(configPath)
        End If

        Dim xmlSerializer As New XmlSerializer(GetType(EmailSerializer))
        Dim stringReader As New StringReader(streamReaderInstance.ReadToEnd())
        result = DirectCast(xmlSerializer.Deserialize(stringReader), EmailSerializer)
        stringReader.Close()
        streamReaderInstance.Close()
        EmailConfig = result.EmailConfig
        Return result
    End Function

End Class

这是我如何读取文件：

_emailSerializer = New EmailSerializer().Load(configEmail)
_emailSerializer.GetEmail()

第一行出错。

如果没有收到此类错误，该怎么办？

Answer 1

您可以更改代码以创建StreamReader，以便它对文件使用只读访问权限。然后多个线程应该能够读取它。

streamReaderInstance = New StreamReader(File.OpenRead(configPath))

从多个线程应用程序/ -s访问文件

1 个答案: