再写一个API获取光驱名和判断有无光盘的方法：
string s ="";
StringBuilder volumeName = new StringBuilder(256);
int srNum = new int();
int comLen = new int();
string sysName = "";
int sysFlags = new int();
int result;
string [] logDrives = System.IO.Directory.GetLogicalDrives();
for(int i=0;i<logDrives.Length;i++)
{
if(api.GetDriveType(logDrives[i])==5)
{
s+="Your CD ROM is on drive : "+logDrives[i].ToString()+"\n";
result = api.GetVolumeInformation(logDrives[i].ToString(),volumeName,256,srNum,comLen,sysFlags,sysName,256);
if(result==0)
s+="CD ROM中没光盘";//不必用try,catch吧
else
{
s+="CD ROM 中有光盘，名称： " + volumeName;
}
}
}
label1.Text=s;
--------------------------------------------------------------------
打开光驱：
api.mciSendString("set CDAudio door open",null, 127, 0);
关闭光驱：
api.mciSendString("set CDAudio door closed",null, 127, 0);
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类api中：
[DllImport("winmm.dll", EntryPoint="mciSendStringA")]
public static extern int mciSendString (string lpstrCommand, string lpstrReturnString, int uReturnLength, int hwndCallback);
[DllImport("kernel32.dll", EntryPoint="GetVolumeInformationA")]
public static extern int GetVolumeInformation (string lpRootPathName,StringBuilder lpVolumeNameBuffer, int nVolumeNameSize, int lpVolumeSerialNumber, int lpMaximumComponentLength, int lpFileSystemFlags, string lpFileSystemNameBuffer, int nFileSystemNameSize);
[DllImport("kernel32.dll", EntryPoint="GetDriveTypeA")]
public static extern int GetDriveType (string nDrive);