vb.net WMI查询到字符串

Question

我对WMI查询有一点问题。我必须检查WMI查询实例中是否存在某个属性，我所做的代码是：

Imports System.Management
Imports System.Management.Instrumentation

Public Class Form1
    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        Dim search_cpu As New ManagementObjectSearcher("SELECT * FROM Win32_Processor")
        Dim info_cpu As ManagementObject '= Convert.ToUInt32("search_cpu")
        Dim cpu_v As Integer
        For Each info_cpu In search_cpu.Get()
            If search_cpu.Get("caption") = True Then
                cpu_v = "Caption"
                Label1.Text = ("Name: " & info_cpu(cpu_v).ToString())
            End If
        Next
    End Sub
End Class

任何帮助将不胜感激。提前致谢

Answer 1

我设法重现。以下代码适合我，Label1现在显示：

Intel64系列6型号58步进9

    Sub Main()
            Dim search_cpu As New ManagementObjectSearcher("SELECT * FROM Win32_Processor")
            Dim info_cpu As ManagementObject '= Convert.ToUInt32("search_cpu")
            Dim caption As String
            For Each info_cpu In search_cpu.Get()
                caption = info_cpu("caption").ToString()
            Next
            Label1.Text = caption
            if (string.isnullorempty(caption))
            Label1.Text ="<does not exist>"
        End Sub