vb.net WMI 查询字符串

Question

我的 WMI 查询有点问题。我必须检查某个属性是否存在于 WMI 查询实例中，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

如有任何帮助，我们将不胜感激。提前致谢

Answer 1

我成功重现了。下面的代码对我来说没问题，Label1 现在显示：

Intel64 家族 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

vb.net WMI 查询字符串

vb.net WMI query to string

wmi-query