即使应用程序关闭并重新启动,我如何保存用户所做的更改?

How can I save the changes made by the user even when the app closes and restarts?

我了解 .FormClosing 事件,但我找不到让用户所做的更改保留在那里的方法,即使应用程序完全关闭并再次打开也是如此。

我试图让一些字符串值保留在用户输入它们的文本框中。示例:

Public Class PersonalInfo

 Dim Name as String = ""
 Dim LastName as String = ""

    Sub NameAndLastName()
        Name = TextBox1.Text
        LastName = TextBox2.Text
    End Sub


    Private Sub Button1_Click(...) Handles Button1.Click
        NameAndLastName()
        Me.Close()
    End Sub

End Class

因此,在关闭事件之后,我需要在重新打开应用程序时,将字符串保留在各自的文本框中。

您必须将它们保存在某个物理位置(文件或数据库)并在您的应用再次启动时检索它们。

最简单解决方案,将TextBox值保存到txt文件中,并在启动应用程序时检索它们。

Private Sub Form1_FormClosing(sender As Object, e As FormClosingEventArgs) Handles Me.FormClosing
        'open new file called saveddata.txt and store each textbox value in new line
        Dim fl As New System.IO.StreamWriter(Application.StartupPath & "\saveddata.txt", False)
        fl.WriteLine(TextBox1.Text)
        fl.WriteLine(TextBox2.Text)
        fl.Close()
    End Sub

Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        'check if saveddata.txt file exist and, if exist, take values from it and store to textboxes
        If System.IO.File.Exists(Application.StartupPath & "\saveddata.txt") = True Then
            Dim fl As New System.IO.StreamReader(Application.StartupPath & "\saveddata.txt")
            TextBox1.Text = fl.ReadLine
            TextBox2.Text = fl.ReadLine
            fl.Close()
        End If
    End Sub

这是最简单的解决方案。您可以将这些值存储到 xml、数据库...值可以被加密,等等。