private static T GetSystemValue <T>([NotNull] string name, T defaultValue = default(T))
{
SystemInfoRequest request = new SystemInfoRequest(SystemInfoType.Win32_ComputerSystem)
{
Scope = "root\\CIMV2"
};
ManagementObject mo = FirstOrDefault(request);
if (mo == null)
{
return(defaultValue);
}
object value;
try
{
value = mo[name];
}
catch
{
value = null;
}
return(value.To(defaultValue));
}
public static IEnumerable <ManagementObject> Get([NotNull] SystemInfoRequest request)
{
(ManagementObjectSearcher searcher, ManagementObjectCollection collection) = GetObjects(request);
try
{
return(request.Filter == null
? collection.OfType <ManagementObject>()
: collection.OfType <ManagementObject>().Where(mo => request.Filter(mo)));
}
catch
{
ObjectHelper.Dispose(ref collection);
ObjectHelper.Dispose(ref searcher);
return(Enumerable.Empty <ManagementObject>());
}
}
public static ManagementObject LastOrDefault([NotNull] SystemInfoRequest request)
{
(ManagementObjectSearcher searcher, ManagementObjectCollection collection) = GetObjects(request);
try
{
return(request.Filter == null
? collection.OfType <ManagementObject>().LastOrDefault()
: collection.OfType <ManagementObject>().LastOrDefault(mo => request.Filter(mo)));
}
catch
{
ObjectHelper.Dispose(ref collection);
ObjectHelper.Dispose(ref searcher);
return(null);
}
}
public static IEnumerable <T> Get <T>([NotNull] SystemInfoRequest <T> request)
{
return(Get((SystemInfoRequest)request).Select(request.Converter));
}
private static (ManagementObjectSearcher Searcher, ManagementObjectCollection Collection) GetObjects([NotNull] SystemInfoRequest request)
{
string search = $"Select {request.SelectExpression} From {request.Type}";
if (!string.IsNullOrEmpty(request.WhereExpression))
{
search += " where " + request.WhereExpression;
}
ManagementObjectSearcher searcher = null;
ManagementObjectCollection collection = null;
ManagementScope scope = string.IsNullOrEmpty(request.ScopeRoot)
? null
: new ManagementScope(request.ScopeRoot);
try
{
searcher = new ManagementObjectSearcher(scope, new ObjectQuery(search), request.Options);
collection = searcher.Get();
}
catch
{
ObjectHelper.Dispose(ref collection);
ObjectHelper.Dispose(ref searcher);
}
return(searcher, collection);
}
public static T LastOrDefault <T>([NotNull] SystemInfoRequest <T> request)
{
return(request.Converter(LastOrDefault((SystemInfoRequest)request)));
}
public static T First <T>([NotNull] SystemInfoRequest <T> request)
{
return(request.Converter(First((SystemInfoRequest)request)));
}
public static T Single <T>([NotNull] SystemInfoRequest <T> request)
{
return(request.Converter(Single((SystemInfoRequest)request)));
}
