private void EnsureArrays()
{
if (arraysFetched)
{
return;
}
arraysFetched = true;
try
{
// marshal the items.
object[] nameItems = nameMarshaller.Items;
object[] cookieItems = valueMarshaller.Items;
Oleaut32.IPerPropertyBrowsing ppb = (Oleaut32.IPerPropertyBrowsing)target.TargetObject;
int itemCount = 0;
Debug.Assert(cookieItems != null && nameItems != null, "An item array is null");
if (nameItems.Length > 0)
{
object[] valueItems = new object[cookieItems.Length];
var var = new Oleaut32.VARIANT();
int cookie;
Debug.Assert(cookieItems.Length == nameItems.Length, "Got uneven names and cookies");
// for each name item, we ask the object for it's corresponding value.
//
Type targetType = target.PropertyType;
for (int i = nameItems.Length - 1; i >= 0; i--)
{
cookie = (int)cookieItems[i];
if (nameItems[i] == null || !(nameItems[i] is string))
{
Debug.Fail("Bad IPerPropertyBrowsing item [" + i.ToString(CultureInfo.InvariantCulture) + "], name=" + (nameItems == null ? "(unknown)" : nameItems[i].ToString()));
continue;
}
var.vt = VARENUM.EMPTY;
HRESULT hr = ppb.GetPredefinedValue(target.DISPID, (uint)cookie, var);
if (hr == HRESULT.S_OK && var.vt != VARENUM.EMPTY)
{
valueItems[i] = var.ToObject();
if (valueItems[i].GetType() != targetType)
{
if (targetType.IsEnum)
{
valueItems[i] = Enum.ToObject(targetType, valueItems[i]);
}
else
{
try
{
valueItems[i] = Convert.ChangeType(valueItems[i], targetType, CultureInfo.InvariantCulture);
}
catch
{
// oh well...
}
}
}
}
var.Clear();
if (hr == HRESULT.S_OK)
{
itemCount++;
continue;
}
if (itemCount > 0)
{
// shorten the arrays to ignore the failed ones. this isn't terribly
// efficient but shouldn't happen very often. It's rare for these to fail.
//
Array.Copy(nameItems, i, nameItems, i + 1, itemCount);
Array.Copy(valueItems, i, valueItems, i + 1, itemCount);
}
}
// pass this data down to the base Com2Enum object...
string[] strings = new string[itemCount];
Array.Copy(nameItems, 0, strings, 0, itemCount);
base.PopulateArrays(strings, valueItems);
}
}
catch (Exception ex)
{
base.PopulateArrays(Array.Empty <string>(), Array.Empty <object>());
Debug.Fail("Failed to build IPerPropertyBrowsing editor. " + ex.GetType().Name + ", " + ex.Message);
}
}
private void EnsureArrays()
{
if (arraysFetched)
{
return;
}
arraysFetched = true;
try
{
// marshal the items.
object[] nameItems = nameMarshaller.Items;
object[] cookieItems = valueMarshaller.Items;
Oleaut32.IPerPropertyBrowsing ppb = (Oleaut32.IPerPropertyBrowsing)owner.GetPerPropertyBrowsing();
int itemCount = 0;
Debug.Assert(cookieItems != null && nameItems != null, "An item array is null");
if (nameItems.Length > 0)
{
object[] valueItems = new object[cookieItems.Length];
var var = new Oleaut32.VARIANT();
int cookie;
Debug.Assert(cookieItems.Length == nameItems.Length, "Got uneven names and cookies");
// for each name item, we ask the object for it's corresponding value.
//
for (int i = 0; i < nameItems.Length; i++)
{
cookie = (int)cookieItems[i];
if (nameItems[i] == null || !(nameItems[i] is string))
{
Debug.Fail("Bad IPerPropertyBrowsing item [" + i.ToString(CultureInfo.InvariantCulture) + "], name=" + (nameItems == null ? "(unknown)" : nameItems[i].ToString()));
continue;
}
var.vt = (short)Ole32.VARENUM.EMPTY;
HRESULT hr = ppb.GetPredefinedValue(target.Dispid, (uint)cookie, var);
if (hr == HRESULT.S_OK && var.vt != Ole32.VARENUM.EMPTY)
{
valueItems[i] = var.ToObject();
}
var.Clear();
itemCount++;
}
// pass this data down to the base Com2Enum object...
if (itemCount > 0)
{
string[] strings = new string[itemCount];
Array.Copy(nameItems, 0, strings, 0, itemCount);
base.PopulateArrays(strings, valueItems);
}
}
}
catch (Exception ex)
{
Debug.Fail("Failed to build IPerPropertyBrowsing editor. " + ex.GetType().Name + ", " + ex.Message);
}
}