Vb.net visualbasic与模块

我正在用VisualBasic编写一个应用程序，向用户介绍他们的电脑

所有这些都在一个模块中

Imports Microsoft.VisualBasic.Devices
Imports System.Management
Imports System.Net
Imports System.IO
Imports System.Windows.Forms
Imports System.Deployment.Application

Module ComputerSpecModule
    Public Enum infotypes
        ProcesserName
        VideocardName
        VideocardMem
    End Enum


    Public Function getinfo(ByVal infotype As infotypes) As String
        Dim info As New ComputerInfo : Dim value, vganame, vgamem, proc As String
        Dim searcher As New Management.ManagementObjectSearcher( _
            "root\CIMV2", "Select * FROM Win32_VideoController")
        Dim searcher1 As New Management.ManagementObjectSearcher( _
            "Select * FROM Win32_Processor")
        If infotype = infotypes.ProcesserName Then
            For Each queryObject As ManagementObject In searcher1.Get
                proc = queryObject.GetPropertyValue("Name").ToString
            Next
            value = proc
        ElseIf infotype = infotypes.VideocardName Then
            For Each queryObject As ManagementObject In searcher.Get
                vganame = queryObject.GetPropertyValue("Name").ToString
            Next
            value = vganame
        ElseIf infotype = infotypes.VideocardMem Then
            For Each queryObject As ManagementObject In searcher.Get
                vgamem = queryObject.GetPropertyValue("AdapterRAM").ToString
            Next
            value = Math.Round((((CDbl(Convert.ToDouble(Val(vgamem))) / 1024)) / 1024), 2) & " MB"
        End If
        Return value

    End Function

    Public oAddr As System.Net.IPAddress 'gets the ipv4 add
    Public sAddr As String


    Public EmailStarterMessage As String = "This message was sent by SpecMee. SpecMee is a light weight application designed to allow the users to find out the specifications of their machines. Please download this application free at http://www.wilson18.com/projects/SpecMee/" + _
    Environment.NewLine + _
    "" + _
    Environment.NewLine + _
    "" + _
    Environment.NewLine + _
    ""


    'PC SPEC CONTENT
    Public ComputerName As String = (My.Computer.Name.ToString)
    Public myOS As String = (My.Computer.Info.OSFullName)
    Public Processor As String = (getinfo(infotypes.ProcesserName))
    Public HDD As String = (Format((My.Computer.FileSystem.Drives.Item(0).TotalSize.ToString / 1024) / 1024 / 1024, "###,###,##0 GB"))
    Public RAM As String = (Format((My.Computer.Info.TotalPhysicalMemory / 1024) / 1024 / 1024, "###,###,##0 GB"))
    Public VideoCard As String = (getinfo(infotypes.VideocardName))
    Public VideoCardMemory As String = (getinfo(infotypes.VideocardMem))
    Public Function Resolution() As String
        Dim intx As Integer = Screen.PrimaryScreen.Bounds.Width
        Dim inty As Integer = Screen.PrimaryScreen.Bounds.Height
        Return intx & " x " & inty
    End Function
    Public Function InternalIPAddress()
        With System.Net.Dns.GetHostByName(System.Net.Dns.GetHostName())
            oAddr = New System.Net.IPAddress(.AddressList(0).Address)
            InternalIPAddress = oAddr.ToString
        End With
    End Function
    Public Function ExternalIPAddress() As String
        Dim uri_val As New Uri("http://www.wilson18.com/projects/SpecMee/curip.php")
        Dim request As HttpWebRequest = HttpWebRequest.Create(uri_val)

        request.Method = WebRequestMethods.Http.Get
        Dim response As HttpWebResponse = request.GetResponse()
        Dim reader As New StreamReader(response.GetResponseStream())
        Dim myip As String = reader.ReadToEnd()
        response.Close()
        Return myip
    End Function



    Public EmailContent As String = ("Computer Name: " & ComputerName & Environment.NewLine & "Operating System: " & myOS & Environment.NewLine & "Processor: " & Processor & Environment.NewLine & "Hard Drive Size : " & HDD & Environment.NewLine & "RAM: " & RAM & Environment.NewLine & "Graphics Card: " & VideoCard & Environment.NewLine & "Graphics Onboard Memory: " & VideoCardMemory & Environment.NewLine & "Resolution: " & Resolution() & Environment.NewLine & "Internal IP Address: " & InternalIPAddress() & Environment.NewLine & "External IP Address: " & ExternalIPAddress() & Environment.NewLine)


End Module

我遇到的问题是，如果模块中的某个东西出现故障，例如如果用户的图形卡没有任何板载内存，那么它将出现故障。这将导致其他所有东西也出现故障

我对VisualBasic非常陌生，如果我犯了任何愚蠢的明显错误，请原谅，欢迎提供任何建议

---

提前感谢。

将可能出现故障的部件放入

Try Catch

-语句中

Public VideoCardMemory As String = getinfo(infotypes.VideocardMem)

Public Function getinfo(ByVal infotype As infotypes) As String        
    Try
        ...
        value = ...
        ...
    Catch
        value = "Cannot be accessed!"
    End Try
    Return value
End Function

---

可以，但是除了trycatch之外，还有什么方法可以阻止整个杀戮呢？trycatch有什么问题吗

Try Catch

让您在发出可能失败的调用的确切位置捕获异常，从而使您能够100%控制代码。异常发生后，代码执行会继续顺利进行，下一个系统信息可以像什么都没有发生一样收集。下面是我需要尝试解决的问题之一，即Public VideoCardMemory as String=（getinfo（infotypes.VideocardMem）），但我不能，因为它不在函数中。我能解决这个问题吗？当然，如果符合您的需要，您可以将

getinfo

的全部代码放在一个

Try Catch

中。相应地更改了示例。