C# 检测驱动器c中dvd插入的最佳方法#
我尝试使用以下代码使用WMI检测磁盘驱动器中的新媒体插入。但是有没有像在后台线程中与DriveInfo.GetDrives一起使用循环这样的托管解决方案？哪种方法是最好的？当我尝试以下代码时，在其他电脑上出现“磁盘不在驱动器中，请插入磁盘”对话框和“中止、重试和继续”按钮？在五月的机器上，它运转良好C# 检测驱动器c中dvd插入的最佳方法#,c#,wmi,driveinfo,C#,Wmi,Driveinfo,我尝试使用以下代码使用WMI检测磁盘驱动器中的新媒体插入。但是有没有像在后台线程中与DriveInfo.GetDrives一起使用循环这样的托管解决方案？哪种方法是最好的？当我尝试以下代码时，在其他电脑上出现“磁盘不在驱动器中，请插入磁盘”对话框和“中止、重试和继续”按钮？在五月的机器上，它运转良好 private void DriveWatcher() { try { var wqlEventQuery = new WqlEventQuery
private void DriveWatcher()
{
try
{
var wqlEventQuery = new WqlEventQuery
{
EventClassName = "__InstanceModificationEvent",
WithinInterval = new TimeSpan(0, 0, 1),
Condition =
@"TargetInstance ISA 'Win32_LogicalDisk' and TargetInstance.DriveType = 5"
};
var connectionOptions = new ConnectionOptions
{
EnablePrivileges = true,
Authority = null,
Authentication = AuthenticationLevel.Default
};
var managementScope = new ManagementScope("\\root\\CIMV2", connectionOptions);
ManagementEventWatcher = new ManagementEventWatcher(managementScope, wqlEventQuery);
ManagementEventWatcher.EventArrived += CdrEventArrived;
ManagementEventWatcher.Start();
}
catch (ManagementException e)
{
MessageBox.Show(e.Message, e.GetType().ToString(), MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
private void CdrEventArrived(object sender, EventArrivedEventArgs e)
{
var wmiDevice = (ManagementBaseObject) e.NewEvent["TargetInstance"];
if (wmiDevice.Properties["VolumeName"].Value != null)
GetDrives();
else
GetDrives();
}
private void GetDrives()
{
if (InvokeRequired)
{
Invoke(new GetDrivesDelegate(GetDrives));
}
else
{
toolStripComboBoxDrives.Items.Clear();
DriveInfo[] drives = DriveInfo.GetDrives();
_drives = new Dictionary<string, DriveInfo>();
int selectedIndex = 0;
foreach (DriveInfo drive in drives)
{
if (drive.DriveType.Equals(DriveType.CDRom))
{
if (drive.IsReady)
{
string name = string.Format("{0} ({1})", drive.VolumeLabel, drive.Name.Substring(0, 2));
int selectedDrive = toolStripComboBoxDrives.Items.Add(name);
_drives.Add(name, drive);
selectedIndex = selectedDrive;
}
else
{
toolStripComboBoxDrives.Items.Add(drive.Name);
_drives.Add(drive.Name, drive);
}
}
}
toolStripComboBoxDrives.SelectedIndex = selectedIndex;
}
}
private void DriveWatcher（）
{
尝试
{
var wqlEventQuery=新的wqlEventQuery
{
EventClassName=“\uu\u InstanceModificationEvent”，
WithinInterval=新的时间跨度（0,0,1），
状况=
@“TargetInstance ISA'Win32_LogicalDisk'和TargetInstance.DriveType=5”
};
var connectionOptions=新的connectionOptions
{
EnablePrivileges=true，
Authority=null，
身份验证=AuthenticationLevel.Default
};
var managementScope=新的管理范围（\\root\\CIMV2”，连接选项）；
ManagementEventWatcher=新的ManagementEventWatcher（managementScope，wqlEventQuery）；
ManagementEventWatcher.EventArrized+=CDREventArrized；
ManagementEventWatcher.Start（）；
}
捕获（e）
{
Show（e.Message，e.GetType（）.ToString（），MessageBoxButtons.OK，MessageBoxIcon.Error）；
}
}
私有void CdrEventArrived（对象发送方，EventArrivedEventArgs e）
{
var wmiDevice=（ManagementBaseObject）e.NewEvent[“TargetInstance”]；
if（wmiDevice.Properties[“VolumeName”].Value！=null）
GetDrives（）；
其他的
GetDrives（）；
}
私有的void GetDrives（）
{
如果（需要调用）
{
调用（新的getdriverselegate（GetDrives））；
}
其他的
{
ToolStripComboxDrives.Items.Clear（）；
DriveInfo[]drives=DriveInfo.GetDrives（）；
_驱动器=新字典（）；
int selectedIndex=0；
foreach（驱动器信息驱动器输入驱动器）
{
if（drive.DriveType.Equals（DriveType.CDRom））
{
如果（驱动器已就绪）
{
string name=string.Format（“{0}（{1}）”，drive.VolumeLabel，drive.name.Substring（0，2））；
int selectedDrive=toolstripcomboxdrives.Items.Add（name）；
_驱动器。添加（名称、驱动器）；
selectedIndex=selectedDrive；
}
其他的
{
ToolStripComboxDrives.Items.Add（drive.Name）；
_drives.Add（drive.Name，drive）；
}
}
}
ToolStripComboxDrives.SelectedIndex=SelectedIndex；
}
}
基本上，我正在做的是一个名为drivewatcher的表单加载事件。因此，当插入磁盘时，就绪磁盘将首先列在组合框中，用户可以轻松弹出驱动器。请参阅以下代码：
foreach (DriveInfo drive in DriveInfo.GetDrives().Where(d => d.DriveType == DriveType.CDRom))
MessageBox.Show(drive.Name + " " + drive.IsReady.ToString());
foreach (DriveInfo drive in DriveInfo.GetDrives().Where(d => d.DriveType == DriveType.CDRom))
MessageBox.Show(drive.Name + " " + drive.IsReady.ToString());
foreach (DriveInfo drive in DriveInfo.GetDrives().Where(d => d.DriveType == DriveType.CDRom))
MessageBox.Show(drive.Name + " " + drive.IsReady.ToString());
参考以下代码：
foreach (DriveInfo drive in DriveInfo.GetDrives().Where(d => d.DriveType == DriveType.CDRom))
MessageBox.Show(drive.Name + " " + drive.IsReady.ToString());
foreach (DriveInfo drive in DriveInfo.GetDrives().Where(d => d.DriveType == DriveType.CDRom))
MessageBox.Show(drive.Name + " " + drive.IsReady.ToString());
foreach (DriveInfo drive in DriveInfo.GetDrives().Where(d => d.DriveType == DriveType.CDRom))
MessageBox.Show(drive.Name + " " + drive.IsReady.ToString());
您可以尝试使用以下代码：
public void networkDevice()
{
try
{
WqlEventQuery q = new WqlEventQuery();
q.EventClassName = "__InstanceModificationEvent";
q.WithinInterval = new TimeSpan(0, 0, 1);
q.Condition = @"TargetInstance ISA 'Win32_LogicalDisk' and TargetInstance.DriveType = 5";
ConnectionOptions opt = new ConnectionOptions();
opt.EnablePrivileges = true;
opt.Authority = null;
opt.Authentication = AuthenticationLevel.Default;
//opt.Username = "Administrator";
//opt.Password = "";
ManagementScope scope = new ManagementScope("\\root\\CIMV2", opt);
ManagementEventWatcher watcher = new ManagementEventWatcher(scope, q);
watcher.EventArrived += new EventArrivedEventHandler(watcher_EventArrived);
watcher.Start();
}
catch (ManagementException e)
{
Console.WriteLine(e.Message);
}
}
void watcher_EventArrived(object sender, EventArrivedEventArgs e)
{
ManagementBaseObject wmiDevice = (ManagementBaseObject)e.NewEvent["TargetInstance"];
string driveName = (string)wmiDevice["DeviceID"];
Console.WriteLine(driveName);
Console.WriteLine(wmiDevice.Properties["VolumeName"].Value);
Console.WriteLine((string)wmiDevice["Name"]);
if (wmiDevice.Properties["VolumeName"].Value != null)
Console.WriteLine("CD has been inserted");
else
Console.WriteLine("CD has been ejected");
}
如果它在您的计算机上工作，而在任何其他基于窗口的计算机上不工作，那么您必须重建/修复/重新注册该计算机的WMI类。这将对您有所帮助。您可以尝试使用以下代码：
public void networkDevice()
{
try
{
WqlEventQuery q = new WqlEventQuery();
q.EventClassName = "__InstanceModificationEvent";
q.WithinInterval = new TimeSpan(0, 0, 1);
q.Condition = @"TargetInstance ISA 'Win32_LogicalDisk' and TargetInstance.DriveType = 5";
ConnectionOptions opt = new ConnectionOptions();
opt.EnablePrivileges = true;
opt.Authority = null;
opt.Authentication = AuthenticationLevel.Default;
//opt.Username = "Administrator";
//opt.Password = "";
ManagementScope scope = new ManagementScope("\\root\\CIMV2", opt);
ManagementEventWatcher watcher = new ManagementEventWatcher(scope, q);
watcher.EventArrived += new EventArrivedEventHandler(watcher_EventArrived);
watcher.Start();
}
catch (ManagementException e)
{
Console.WriteLine(e.Message);
}
}
void watcher_EventArrived(object sender, EventArrivedEventArgs e)
{
ManagementBaseObject wmiDevice = (ManagementBaseObject)e.NewEvent["TargetInstance"];
string driveName = (string)wmiDevice["DeviceID"];
Console.WriteLine(driveName);
Console.WriteLine(wmiDevice.Properties["VolumeName"].Value);
Console.WriteLine((string)wmiDevice["Name"]);
if (wmiDevice.Properties["VolumeName"].Value != null)
Console.WriteLine("CD has been inserted");
else
Console.WriteLine("CD has been ejected");
}
如果它在您的计算机上工作，而在任何其他基于窗口的计算机上不工作，那么您必须重建/修复/重新注册该计算机的WMI类。这将对您有所帮助。我将采用以下解决方案。这是一个100%托管的解决方案。它没有使用WMI，工作得很好
internal class DriveWatcher
{
public delegate void OpticalDiskArrivedEventHandler(Object sender, OpticalDiskArrivedEventArgs e);
/// <summary>
/// Gets or sets the time, in seconds, before the drive watcher checks for new media insertion relative to the last occurance of check.
/// </summary>
public int Interval = 1;
private Timer _driveTimer;
private Dictionary<string, bool> _drives;
private bool _haveDisk;
/// <summary>
/// Occurs when a new optical disk is inserted or ejected.
/// </summary>
public event OpticalDiskArrivedEventHandler OpticalDiskArrived;
private void OnOpticalDiskArrived(OpticalDiskArrivedEventArgs e)
{
OpticalDiskArrivedEventHandler handler = OpticalDiskArrived;
if (handler != null) handler(this, e);
}
public void Start()
{
_drives = new Dictionary<string, bool>();
foreach (
DriveInfo drive in
DriveInfo.GetDrives().Where(driveInfo => driveInfo.DriveType.Equals(DriveType.CDRom)))
{
_drives.Add(drive.Name, drive.IsReady);
}
_driveTimer = new Timer {Interval = Interval*1000};
_driveTimer.Elapsed += DriveTimerOnElapsed;
_driveTimer.Start();
}
public void Stop()
{
if (_driveTimer != null)
{
_driveTimer.Stop();
_driveTimer.Dispose();
}
}
private void DriveTimerOnElapsed(object sender, ElapsedEventArgs elapsedEventArgs)
{
if (!_haveDisk)
{
try
{
_haveDisk = true;
foreach (DriveInfo drive in from drive in DriveInfo.GetDrives()
where drive.DriveType.Equals(DriveType.CDRom)
where _drives.ContainsKey(drive.Name)
where !_drives[drive.Name].Equals(drive.IsReady)
select drive)
{
_drives[drive.Name] = drive.IsReady;
OnOpticalDiskArrived(new OpticalDiskArrivedEventArgs {Drive = drive});
}
}
catch (Exception exception)
{
Debug.Write(exception.Message);
}
finally
{
_haveDisk = false;
}
}
}
}
internal class OpticalDiskArrivedEventArgs : EventArgs
{
public DriveInfo Drive;
}
我将使用以下解决方案。这是一个100%托管的解决方案。它没有使用WMI，工作得很好
internal class DriveWatcher
{
public delegate void OpticalDiskArrivedEventHandler(Object sender, OpticalDiskArrivedEventArgs e);
/// <summary>
/// Gets or sets the time, in seconds, before the drive watcher checks for new media insertion relative to the last occurance of check.
/// </summary>
public int Interval = 1;
private Timer _driveTimer;
private Dictionary<string, bool> _drives;
private bool _haveDisk;
/// <summary>
/// Occurs when a new optical disk is inserted or ejected.
/// </summary>
public event OpticalDiskArrivedEventHandler OpticalDiskArrived;
private void OnOpticalDiskArrived(OpticalDiskArrivedEventArgs e)
{
OpticalDiskArrivedEventHandler handler = OpticalDiskArrived;
if (handler != null) handler(this, e);
}
public void Start()
{
_drives = new Dictionary<string, bool>();
foreach (
DriveInfo drive in
DriveInfo.GetDrives().Where(driveInfo => driveInfo.DriveType.Equals(DriveType.CDRom)))
{
_drives.Add(drive.Name, drive.IsReady);
}
_driveTimer = new Timer {Interval = Interval*1000};
_driveTimer.Elapsed += DriveTimerOnElapsed;
_driveTimer.Start();
}
public void Stop()
{
if (_driveTimer != null)
{
_driveTimer.Stop();
_driveTimer.Dispose();
}
}
private void DriveTimerOnElapsed(object sender, ElapsedEventArgs elapsedEventArgs)
{
if (!_haveDisk)
{
try
{
_haveDisk = true;
foreach (DriveInfo drive in from drive in DriveInfo.GetDrives()
where drive.DriveType.Equals(DriveType.CDRom)
where _drives.ContainsKey(drive.Name)
where !_drives[drive.Name].Equals(drive.IsReady)
select drive)
{
_drives[drive.Name] = drive.IsReady;
OnOpticalDiskArrived(new OpticalDiskArrivedEventArgs {Drive = drive});
}
}
catch (Exception exception)
{
Debug.Write(exception.Message);
}
finally
{
_haveDisk = false;
}
}
}
}
internal class OpticalDiskArrivedEventArgs : EventArgs
{
public DriveInfo Drive;
}
您是否在基于windows的计算机上进行检查？是的，我的电脑有windows 8，但其他电脑有windows 7和windows 5（共1次），它会在告诉我插入磁盘时出错。您是否尝试过我的回答？是否按照您的建议验证WMI存储库。完成后更新问题。您是否在基于windows的计算机上进行检查？是的，我的电脑有windows 8，但其他电脑有windows 7和windows 5，但有1次它在告诉我插入磁盘时抛出错误。您是否尝试过我的回答？是否按照您的建议验证WMI存储库。完成后更新问题。重置WMI有效。但我认为有管理的解决方案将被证明比使用WMI更好。重置WMI很有效。但我认为有管理的解决方案将被证明比使用WMI更好。您的代码似乎没有按编写的方式执行。没有名为“DriveSystemWatcher”的类。调用OpticalDiskHandler大约需要10-12秒。。还有其他人面临类似的问题吗？我在应用程序中使用了此代码。另请参阅，您可以使用DriveWatcher类的interval参数调整轮询间隔。您的代码似乎没有按编写的方式执行。没有名为“DriveSystemWatcher”的类。调用OpticalDiskHandler大约需要10-12秒。。还有其他人面临类似的问题吗？我在应用程序中使用了此代码。另请参见，您可以使用DriveWatcher类的interval参数调整轮询间隔。