VB.NET form.show() 错误

Question

每次使用时：

form1.show()

我收到Reference to a non-shared member requires an object reference.

到现在还有效。不知道是什么问题。

此外，它甚至不显示在“启动表单”下拉菜单中。

编辑：包括整个代码。

Private _cpuid As String


///Here is the generated constructor

    Sub New()
        ' TODO: Complete member initialization 
    End Sub



    Public ReadOnly Property cpuid As String
        Get
            Return _cpuid
        End Get
    End Property

    Private _pc As PerformanceCounter
    Private _currentvalue As Integer = 0
    Public Sub New(ByVal cpuid As String)
        InitializeComponent()
        _cpuid = cpuid
        _pc = New PerformanceCounter("Processes", "CPU Usage (%)", cpuid)
        Me.ProgressBar1.Maximum = 100
        Me.ProgressBar1.Minimum = 0

        Me.Label1.Text = "CPU" & cpuid
    End Sub
    Public Sub callperformancecounter()
        _currentvalue = CInt(_pc.NextValue())
        Me.ProgressBar1.Value = _currentvalue
        Me.label2.text = _currentvalue & " %"


    End Sub

Answer 1

假设项目中有一个名为 form1 的表单，您需要创建它的一个实例：

Dim frm as New Form1    ' creates the instance the msg is talking about

frm.Show

编辑新信息...

你已经重写了构造函数，然后没有使用它。我不会那样做，在 Form Load 事件中进行 CPU 设置（只需移动代码）。修复你的 Sub New ：

Sub New(cpuID As String)
    ' TODO: Complete member initialization 

     InitializeComponent()      ' the TODO is telling you this is needed

     _cpuID = cpuID
End Sub

表单加载将是您的代码的其余部分：

  _pc = New PerformanceCounter("Processes", "CPU Usage (%)", cpuid)
  Me.ProgressBar1.Maximum = 100
  Me.ProgressBar1.Minimum = 0

  Me.Label1.Text = "CPU" & cpuid

如果将 cpuid 传递给 New 或设置属性，则不需要将 cpuid 传递给过程（到目前为止，您实际上并不需要这两种方法）。

现在，您要显示表单的方式是：

  Dim frm as Form1                   ' declare what frm is

  frm = New Form1(cpuname)           ' this 'NEW' triggers 'Sub New'

  frm.Show