protected override bool RunDialog(IntPtr hwndOwner)
{
IntPtr dataObj = IntPtr.Zero;
NativeMethods.IDsObjectPicker ipicker = Initialize();
if (ipicker == null)
{
_selectedObjects = null;
return(false);
}
int hResult = ipicker.InvokeDialog(hwndOwner, ref dataObj);
if (dataObj != IntPtr.Zero)
{
_selectedObjects = ProcessSelections(dataObj);
}
return(hResult == NativeMethods.HRESULT.S_OK);
}
private NativeMethods.IDsObjectPicker Initialize()
{
NativeMethods.DSObjectPicker picker = new NativeMethods.DSObjectPicker();
NativeMethods.IDsObjectPicker ipicker = (NativeMethods.IDsObjectPicker)picker;
NativeMethods.DSOP_SCOPE_INIT_INFO[] scopeInitInfo = new NativeMethods.DSOP_SCOPE_INIT_INFO[2];
// The default and filters are used by all scopes
uint defaultFilter = GetDefaultFilter();
uint upLevelFilter = GetUpLevelFilter();
uint downLevelFilter = GetDownLevelFilter();
// Use one scope for the default (starting) locations.
uint startingScope = GetStartingScope();
if (startingScope > 0)
{
scopeInitInfo[0].cbSize = (uint)Marshal.SizeOf(typeof(NativeMethods.DSOP_SCOPE_INIT_INFO));
scopeInitInfo[0].flType = startingScope;
scopeInitInfo[0].flScope = NativeMethods.DSOP_SCOPE_INIT_INFO_FLAGS.DSOP_SCOPE_FLAG_STARTING_SCOPE | defaultFilter;
scopeInitInfo[0].FilterFlags.Uplevel.flBothModes = upLevelFilter;
scopeInitInfo[0].FilterFlags.flDownlevel = downLevelFilter;
scopeInitInfo[0].pwzADsPath = null;
scopeInitInfo[0].pwzDcName = null;
scopeInitInfo[0].hr = 0;
}
// Allocate memory from the unmananged mem of the process, this should be freed later!!!
IntPtr refScopeInitInfo = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(NativeMethods.DSOP_SCOPE_INIT_INFO)) * scopeInitInfo.Length);
// Marshal structs to pointers
for (int index = 0; index < scopeInitInfo.Length; index++)
{
Marshal.StructureToPtr(scopeInitInfo[index], (IntPtr)((long)refScopeInitInfo + index * Marshal.SizeOf(typeof(NativeMethods.DSOP_SCOPE_INIT_INFO))), false);
}
// Initialize structure with data to initialize an object picker dialog box.
NativeMethods.DSOP_INIT_INFO initInfo = new NativeMethods.DSOP_INIT_INFO();
initInfo.cbSize = (uint)Marshal.SizeOf(initInfo);
initInfo.pwzTargetComputer = null;
initInfo.cDsScopeInfos = (uint)scopeInitInfo.Length;
initInfo.aDsScopeInfos = refScopeInitInfo;
initInfo.flOptions = 0;
initInfo.cAttributesToFetch = length;
if (length > 0)
{
MarshalStrings strings = new MarshalStrings(attributeNames);
initInfo.apwzAttributeNames = strings.ArrayPtr;
}
else
{
initInfo.cAttributesToFetch = 0;
initInfo.apwzAttributeNames = IntPtr.Zero;
}
int hresult = ipicker.Initialize(ref initInfo);
if (hresult != NativeMethods.HRESULT.S_OK)
{
return(null);
}
return(ipicker);
}
