无法为第二个实例 WPF 保存配置文件

Question

我在处理我的程序的两个实例时在保存配置文件时遇到问题。我能够在一个看起来像这样的简单示例项目中重现此问题：

Class MainWindow
   Dim config As System.Configuration.Configuration

   Public Sub New()
      config = System.Configuration.ConfigurationManager.OpenExeConfiguration(System.Configuration.ConfigurationUserLevel.None)
   End Sub

   Protected Overrides Sub OnClosing(e As CancelEventArgs)
      config.Save(ConfigurationSaveMode.Modified, True)
   End Sub
End Class

第一个实例在关闭时保存配置，但是当我尝试关闭第二个实例时，config.Save(ConfigurationSaveMode.Modified, True) 抛出一个错误，指出配置文件被另一个程序更改。我希望有人能够帮助我解决这个问题。提前致谢。

编辑：忘记删除 MyBase 调用

edit2：尝试了 Chillzy 的建议，但也失败了。

   Protected Overrides Sub OnClosing(e As CancelEventArgs)
      Dim mdate As String = Date.Now.ToString("yyyyMMdd_HHmmss")
      Dim mptpath As String = Path.GetDirectoryName(config.FilePath) & "\" & mdate
      config.SaveAs(mdate, ConfigurationSaveMode.Full, True)
      File.Delete(fpath)
      File.Move(mptpath, fpath)
   End Sub

Answer 1

您正在通过在 OnClosing 结束时调用 OnClosing 来创建一个循环

  Protected Overrides Sub OnClosing(e As CancelEventArgs)
      config.Save(ConfigurationSaveMode.Modified, True)
  End Sub

Answer 2

那里。您复制加载配置文件然后另存为。重新读取 saveas 文件作为当前配置文件。在你出去的路上你做相反的事情

Imports System.Configuration
Imports System.IO

Public Class Form1

    Dim config As System.Configuration.Configuration
    Dim fpath As String = ""
    Dim mptpath As String = ""
    Public Sub New()
        config = System.Configuration.ConfigurationManager.OpenExeConfiguration(System.Configuration.ConfigurationUserLevel.None)
        fpath = config.FilePath
        Dim mdate As String = Date.Now.ToString("yyyyMMdd_HHmmss")
        mptpath = Path.GetDirectoryName(config.FilePath) & "\" & mdate & ".config"
        config.SaveAs(mptpath, ConfigurationSaveMode.Full, True)
        config = System.Configuration.ConfigurationManager.OpenExeConfiguration(mptpath)

    End Sub

    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles Me.Load

    End Sub

    Private Sub Form1_FormClosing(sender As Object, e As FormClosingEventArgs) Handles Me.FormClosing
        File.Delete(fpath)
        config.SaveAs(fpath, ConfigurationSaveMode.Full, True)
        File.Delete(mptpath)
    End Sub
End Class

无法为第二个实例 WPF 保存配置文件

Config File cannot be saved for second instance WPF

vb.net

wpf

config