所以我得到这个错误，说我得到一个 System.invalidOperationexception 这里是完整的错误：
[Managed to Native Transition]
Port Scan.exe!WindowsApplication1.My.MyProject.MyForms.Form1.get()
Port Scan.exe!WindowsApplication1.My.MyApplication.OnCreateMainForm()
Microsoft.VisualBasic.dll!Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicatio Base.OnRun()
Microsoft.VisualBasic.dll!Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplication Base.DoApplicationModel()
Microsoft.VisualBasic.dll!Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplication Base.Run(string[] commandLine)
[Native to Managed Transition]
mscorlib.dll!System.Runtime.Hosting.ApplicationActivator.CreateInstance(System.ActivationCo ntext activationContext, string[] activationCustomData)
Microsoft.VisualStudio.HostingProcess.Utilities.dll!Microsoft.VisualStudio.HostingProcess.H ostProc.RunUsersAssemblyDebugInZone()
mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContex t executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state)
mscorlib.dll!System.Threading.ThreadHelper.ThreadStart()
[Native to Managed Transition]
这是我要编译的代码，用于端口扫描仪
Public Class Form1
Dim host As String
Dim counter As Integer
Dim portmin As Integer = TextBox3.Text
Dim portmax As Integer = TextBox2.Text
Private Sub Form1_Load(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles MyBase.Load
Button1.Enabled = False
'set counter explained before to 0
counter = 0
End Sub
Private Sub Timer1_Tick(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Timer1.Tick
'Set the host and port and counter
counter = counter + 1 'counter is for the timer
host = TextBox1.Text
For port As Integer = portmin To portmax
If (port = portmax) Then
Exit For
End If
' Next part creates a socket to try and connect
' on with the given user information.
Dim hostadd As System.Net.IPAddress = _
System.Net.Dns.GetHostEntry(host).AddressList(0)
Dim EPhost As New System.Net.IPEndPoint(hostadd, port)
Dim s As New System.Net.Sockets.Socket( _
System.Net.Sockets.AddressFamily.InterNetwork, _
System.Net.Sockets.SocketType.Stream, _
System.Net.Sockets.ProtocolType.Tcp)
Try
s.Connect(EPhost)
Catch
End Try
If Not s.Connected Then
ListBox1.Items.Add("Port " + port.ToString + " is not open")
Else
ListBox1.Items.Add("Port " + port.ToString + " is open")
ListBox2.Items.Add(port.ToString)
End If
Label3.Text = "Open Ports: " + ListBox2.Items.Count.ToString
Next
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button1.Click
'stop button
Timer1.Stop()
Timer1.Enabled = False
Button1.Enabled = True
Button2.Enabled = False
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button2.Click
ListBox1.Items.Add("Scanning: " + TextBox1.Text)
ListBox1.Items.Add("-------------------")
Button2.Enabled = True
Button1.Enabled = False
Timer1.Enabled = True
Timer1.Start()
End Sub
Private Sub TextBox1_TextChanged(sender As Object, e As EventArgs) Handles TextBox1.TextChanged
End Sub
Private Sub TextBox2_TextChanged(sender As Object, e As EventArgs) Handles TextBox2.TextChanged
End Sub
Private Sub ListBox2_SelectedIndexChanged(sender As Object, e As EventArgs) Handles ListBox2.SelectedIndexChanged
End Sub
End Class
我非常感谢您的帮助，因为我一直在这个错误上停留一段时间并且无法构建 exe。似乎该错误仅在我执行 for 循环以允许最小和最大端口号时发生。