private void ReleaseAxControl() {
// This line is like a bit of magic...
// sometimes, we crash with it on,
// sometimes, with it off...
// Lately, I have decided to leave it on...
// (oh, yes, and the crashes seemed to disappear...)
//cpr: ComLib.Release(instance);
this.NoComponentChangeEvents++;
ContainerControl f = ContainingControl;
if (f != null) {
f.VisibleChanged -= this.onContainerVisibleChanged;
}
try {
if (instance != null) {
Marshal.FinalReleaseComObject(instance);
instance = null;
iOleInPlaceObject = null;
iOleObject = null;
iOleControl = null;
iOleInPlaceActiveObject = null;
iOleInPlaceActiveObjectExternal = null;
iPerPropertyBrowsing = null;
iCategorizeProperties = null;
iPersistStream = null;
iPersistStreamInit = null;
iPersistStorage = null;
}
axState[checkedIppb] = false;
axState[checkedCP] = false;
axState[disposed] = true;
freezeCount = 0;
axState[sinkAttached] = false;
wndprocAddr = IntPtr.Zero;
SetOcState(OC_PASSIVE);
}
finally {
this.NoComponentChangeEvents--;
}
}
private void DepersistControl() {
Freeze(true);
if (ocxState == null) {
// must init new:
//
if (instance is UnsafeNativeMethods.IPersistStreamInit) {
iPersistStreamInit = (UnsafeNativeMethods.IPersistStreamInit) instance;
try {
storageType = STG_STREAMINIT;
iPersistStreamInit.InitNew();
}
catch (Exception e1) {
Debug.WriteLineIf(AxHTraceSwitch.TraceVerbose, "Exception thrown trying to IPersistStreamInit.InitNew(). Is this good?" + e1.ToString());
}
return;
}
if (instance is UnsafeNativeMethods.IPersistStream) {
storageType = STG_STREAM;
iPersistStream = (UnsafeNativeMethods.IPersistStream) instance;
return;
}
if (instance is UnsafeNativeMethods.IPersistStorage) {
storageType = STG_STORAGE;
ocxState = new State(this);
iPersistStorage = (UnsafeNativeMethods.IPersistStorage) instance;
try {
iPersistStorage.InitNew(ocxState.GetStorage());
}
catch (Exception e2) {
Debug.WriteLineIf(AxHTraceSwitch.TraceVerbose, "Exception thrown trying to IPersistStorage.InitNew(). Is this good?" + e2.ToString());
}
return;
}
if (instance is UnsafeNativeMethods.IPersistPropertyBag) {
Debug.WriteLineIf(AxHTraceSwitch.TraceVerbose, this + " supports IPersistPropertyBag.");
iPersistPropBag = (UnsafeNativeMethods.IPersistPropertyBag) instance;
try {
iPersistPropBag.InitNew();
}
catch (Exception e1) {
Debug.WriteLineIf(AxHTraceSwitch.TraceVerbose, "Exception thrown trying to IPersistPropertyBag.InitNew(). Is this good?" + e1.ToString());
}
}
Debug.Fail("no implemented persitance interfaces on object");
throw new InvalidOperationException(SR.GetString(SR.UnableToInitComponent));
}
// Otherwise, we have state to deperist from:
switch (ocxState.Type) {
case STG_STREAM:
try {
iPersistStream = (UnsafeNativeMethods.IPersistStream) instance;
DepersistFromIStream(ocxState.GetStream());
}
catch (Exception e) {
Debug.WriteLineIf(AxHTraceSwitch.TraceVerbose, "Exception thrown trying to IPersistStream.DepersistFromIStream(). Is this good?" + e.ToString());
}
break;
case STG_STREAMINIT:
if (instance is UnsafeNativeMethods.IPersistStreamInit) {
try {
iPersistStreamInit = (UnsafeNativeMethods.IPersistStreamInit) instance;
DepersistFromIStreamInit(ocxState.GetStream());
}
catch (Exception e) {
Debug.WriteLineIf(AxHTraceSwitch.TraceVerbose, "Exception thrown trying to IPersistStreamInit.DepersistFromIStreamInit(). Is this good?" + e.ToString());
}
GetControlEnabled();
}
else {
ocxState.Type = STG_STREAM;
DepersistControl();
return;
}
break;
case STG_STORAGE:
try {
iPersistStorage = (UnsafeNativeMethods.IPersistStorage) instance;
DepersistFromIStorage(ocxState.GetStorage());
}
catch (Exception e) {
Debug.WriteLineIf(AxHTraceSwitch.TraceVerbose, "Exception thrown trying to IPersistStorage.DepersistFromIStorage(). Is this good?" + e.ToString());
}
break;
default:
Debug.Fail("unknown storage type.");
throw new InvalidOperationException(SR.GetString(SR.UnableToInitComponent));
}
if (ocxState.GetPropBag() != null) {
try {
iPersistPropBag = (UnsafeNativeMethods.IPersistPropertyBag)instance;
DepersistFromIPropertyBag(ocxState.GetPropBag());
}
catch (Exception e) {
Debug.WriteLineIf(AxHTraceSwitch.TraceVerbose, "Exception thrown trying to IPersistPropertyBag.DepersistFromIPropertyBag(). Is this good?" + e.ToString());
}
}
}
