VB.NET开发：如何让杀毒软件重启后仍显示“You are protected”提示

Hey there! The problem you're hitting is that your current code only updates UI elements in memory—once you close and restart the program, all those changes get wiped. To keep the "You are protected" state across restarts, you need to save that state to a persistent storage spot (like app settings, the registry, or a local file).

The easiest way to do this in VB.NET is using Application Settings—it’s built right into the framework and needs minimal code. Here’s how to set it up:

Step 1: Add a Persistent Setting #

1. Right-click your project in Solution Explorer and select Properties.
2. Switch to the Settings tab. If you see a message saying "This project does not have a settings file yet", click the link to create one.
3. Add a new setting:
   • Name: HasCompletedFirstScan
   • Type: Boolean
   • Scope: User (so it’s saved per user account)
   • Value: False (default state before the first scan is run)

Step 2: Update Your Code to Use the Setting #

First, add a Load event handler to your main form. This will check the saved state when the app starts and set the UI correctly:

Private Sub Mainframe_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    ' Check if the first scan was already completed
    If My.Settings.HasCompletedFirstScan Then
        ' Apply the "protected" UI state
        PictureBox2.Hide()
        Label2.ForeColor = Color.Green
        Label2.Text = "Awesome!"
        Label3.Text = "You are protected."
        Label3.Location = New Point(453, 152)
        FlatButton1.Hide()
        FlatButton2.Location = New Point(453, 229)
        PictureBox3.Show()
        PictureBox3.Location = New Point(218, 115)
        Label2.Location = New Point(341, 152)
    End If
End Sub

Then, modify your FlatButton1_Click_1 method to save the state after the first scan is triggered:

Private Sub FlatButton1_Click_1(sender As Object, e As EventArgs) Handles FlatButton1.Click
    ' Your existing UI update code
    PictureBox2.Hide()
    Label2.ForeColor = Color.Green
    Label2.Text = "Awesome!"
    Label3.Text = "You are protected."
    Label3.Location = New Point(453, 152)
    FlatButton1.Hide()
    FlatButton2.Location = New Point(453, 229)
    PictureBox3.Show()
    PictureBox3.Location = New Point(218, 115)
    Label2.Location = New Point(341, 152)

    ' Save the "first scan completed" state to settings
    My.Settings.HasCompletedFirstScan = True
    My.Settings.Save()
End Sub

Why This Works #

My.Settings automatically stores the value in a user-specific config file (usually in %USERPROFILE%\AppData\Local\[YourAppName]), so it sticks around even after you close and reopen the program.

Alternative Options (If You Need More Control) #

• Registry: You could use Microsoft.Win32.Registry to write a value to the user’s registry, but this requires more code and is overkill for a simple state flag.
• Local File: Create a small text file in the app’s data directory to store the state, but you’d have to handle file I/O and potential errors manually.

Application Settings are the best pick here because they’re straightforward, managed by .NET, and don’t need extra dependencies.

内容的提问来源于stack exchange，提问作者user9161945