/// <summary>
/// Returns an array of DsDevices of type devcat.
/// </summary>
/// <param name="filterCategory">Any one of FilterCategory</param>
public static DsDevice[] GetDevicesOfCat(Guid filterCategory)
{
// Use arrayList to build the retun list since it is easily resizable
DsDevice[] devret;
ArrayList devs = new ArrayList();
IEnumMoniker enumMon;
ICreateDevEnum enumDev = (ICreateDevEnum) new CreateDevEnum();
var hr = enumDev.CreateClassEnumerator(filterCategory, out enumMon, 0);
DsError.ThrowExceptionForHR(hr);
// CreateClassEnumerator returns null for enumMon if there are no entries
if (hr != 1)
{
try
{
try
{
IMoniker[] mon = new IMoniker[1];
while ((enumMon.Next(1, mon, IntPtr.Zero) == 0))
{
try
{
// The devs array now owns this object. Don't
// release it if we are going to be successfully
// returning the devret array
devs.Add(new DsDevice(mon[0]));
}
catch
{
DsUtils.ReleaseComObject(mon[0]);
throw;
}
}
}
finally
{
DsUtils.ReleaseComObject(enumMon);
}
// Copy the ArrayList to the DsDevice[]
devret = new DsDevice[devs.Count];
devs.CopyTo(devret);
}
catch
{
foreach (DsDevice d in devs)
{
d.Dispose();
}
throw;
}
}
else
{
devret = new DsDevice[0];
}
return(devret);
}
