Question

我想知道检测鼠标或键盘是否插入计算机的最佳方法是什么？我有一个应用程序，主要用于单独的触摸屏，但我想知道是否有一个键盘插入不要拉起Windows键盘或包含数字键盘的表格。如果插入鼠标，则更改一些行为，如果不是。

Answer 1

使用VB.Net，我会使用System.Management（不要忘记在项目[菜单] - >添加参考中添加此引用）ManagementObjectSearcher结合{{1}找到像这样的解决方案，

System.Linq

结果

您也可以对其进行硬编码以避免像TRiNE建议的输入错误（尽管使用C＃）

Imports System
Imports System.Management
Imports System.Linq

Public Module Module1
    Public Sub Main()
        Console.WriteLine(HasDevice("PointingDevice"))
        Console.WriteLine(HasDevice("Keyboard"))
        Console.ReadKey()
    End Sub

    Public Function HasDevice(strtype As String)
        Dim searcher As New ManagementObjectSearcher("root\CIMV2", "SELECT * FROM Win32_" + strtype)
        Dim result = From mobj In searcher.Get()
                     Select mobj Where mobj("Status").ToString() = 0
        Return Not IsNothing(result)
    End Function    
End Module

并像这样打电话给他们

Public Function HasPointingDevice()
    Dim searcher As New ManagementObjectSearcher("root\CIMV2", "SELECT * FROM Win32_PointingDevice")
    Dim result = From mobj In searcher.Get()
                 Select mobj Where mobj("Status").ToString() = 0
    Return Not IsNothing(result)
End Function

Public Function HasKeyboard()
    Dim searcher As New ManagementObjectSearcher("root\CIMV2", "SELECT * FROM Win32_Keyboard")
    Dim result = From mobj In searcher.Get()
                 Select mobj Where mobj("Status").ToString() = 0
    Return Not IsNothing(result)
End Function

他们将产生相同的结果

Answer 2

您可以使用C＃System.Management和ManagementObjectSearcher

以下是示例代码。根据您的需要进行修改。

    public bool isPointingDeviceAttached()
    {
        ManagementObjectSearcher searcher = 
            new ManagementObjectSearcher("root\\CIMV2", "SELECT * FROM Win32_PointingDevice");

        int devCount = 0;

        foreach (ManagementObject obj in searcher.Get()) {
            if(obj["Status"].ToString().Contains("OK")) // if device is ready
            devCount++;
        }
        return devCount>0;
    }

    public bool isKeyboardAttached()
    {
        ManagementObjectSearcher searcher = 
            new ManagementObjectSearcher("root\\CIMV2", "SELECT * FROM Win32_Keyboard");

        int devCount = 0;

        foreach (ManagementObject obj in searcher.Get()) {
            if (obj["Status"].ToString().Contains("OK")) // if device is ready
                devCount++;
        }

        return devCount>0;
    }

确保添加using System.Management;行并在引用中添加System.Management。您可以使用更多ManagementObject属性来满足您的需要。这是一个属性列表和一些其他外部引用。

Pointing device class ref. & attribute list

C#, C++ similar example

以编程方式检测鼠标和键盘是否已插入

2 个答案: