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新手求教为什么餐厅点菜触摸屏一体机都是电阻屏新手求教为什么餐厅点菜触摸屏一体机都是电阻屏，电容屏的操作不是更好吗，是触摸屏寿命问题吗，还是电容屏大了不稳定，求个专业的帮忙解释下

vb.net 用 wmi 做monitor时，怎么调用waitfornextevent vb.net 用 wmi 做monitor时，怎么调用waitfornextevent ，网上找不到相关例程，搞到要吐血了，vbs很简单就实现了，vb.net哪位大神做过monitor，帮忙教下这是vbs，运行正常的 strComputer = "." Set objWMIService = GetObject("winmgmts:" _ & "{impersonationLevel=impersonate}!\\" & strComputer & "\root\cimv2") Set colMonitoredProcesses = objWMIService. _ ExecNotificationQuery("select * from __instanceoperationevent " _ & " within 1 where TargetInstance isa 'Win32_PrintJob'") i = 0 Do While i = 0 Set objLatestProcess = colMonitoredProcesses.NextEvent Wscript.Echo objLatestProcess.TargetInstance.DriverName & objLatestProcess.TargetInstance.JobStatus Loop vb.net我就搞不来了，要内伤了，求高手帮忙改改~~ Imports System.Management Public Class Form1 Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Dim cmicWmi As New System.Management.ManagementEventWatcher("select * from __InstanceOperationEvent within 1 where TargetInstance isa 'Win32_Printjob'") Dim i As Long i = 1 Do While i = 1 cmicWmi.WaitForNextEvent() ' ListBox1.Items.Add(cmicWmi.WaitForNextEvent("driverName") + " " + cmicWmi.WaitForNextEvent("jobstatus")) 'ListBox1.Items.Add("Service: " + cmicWmiObj("Name") + " FilePath: " + cmicWmiObj("ExecutablePath")) Loop End Sub End Class

vb.net 用 wmi 做监视器时，怎么调用waitfornextevent vb.net 用 wmi 做监视器时，怎么调用waitfornextevent，网上找不到相关历程，哪位高手可以稍微教下下面是我搞的，准备监视打印机任务，搞不下去了，nextevent不知道怎么用，求帮忙~ Imports System.Management Public Class Form1 Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Dim cmicWmi As New System.Management.ManagementEventWatcher("select * from __InstanceOperationEvent within 1 where TargetInstance isa 'Win32_Printjob'") Dim i As Long i = 1 Do While i = 1 'cmicWmi.WaitForNextEvent() ' ListBox1.Items.Add(cmicWmi.WaitForNextEvent("driverName") + " " + cmicWmi.WaitForNextEvent("jobstatus")) 'ListBox1.Items.Add("Service: " + cmicWmiObj("Name") + " FilePath: " + cmicWmiObj("ExecutablePath")) Loop End Sub End Class

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