internal void Dispose(bool disposing)
{
if (_dc != null)
{
DbgUtil.AssertFinalization(this, disposing);
try
{
// Restore original dc.
_dc.RestoreHdc();
if (_disposeDc)
{
_dc.Dispose(disposing);
}
if (_graphics != null) // if created from a Graphics object...
{
_graphics.ReleaseHdcInternal(_dc.Hdc);
_graphics = null;
}
}
catch (Exception ex) when(!ClientUtils.IsSecurityOrCriticalException(ex))
{
Debug.Fail("Exception thrown during disposing: \r\n" + ex.ToString());
}
finally
{
_dc = null;
}
}
}
internal void Dispose(bool disposing)
{
if (_disposed)
{
return;
}
Disposing?.Invoke(this, EventArgs.Empty);
_disposed = true;
switch (_dcType)
{
case DeviceContextType.Information:
case DeviceContextType.NamedDevice:
Interop.Gdi32.DeleteDC(new HandleRef(this, _hDC));
_hDC = IntPtr.Zero;
break;
case DeviceContextType.Memory:
Interop.Gdi32.DeleteDC(new HandleRef(this, _hDC));
_hDC = IntPtr.Zero;
break;
// case DeviceContextType.Metafile: - not yet supported.
case DeviceContextType.Unknown:
default:
return;
// do nothing, the hdc is not owned by this object.
// in this case it is ok if disposed throught finalization.
}
DbgUtil.AssertFinalization(this, disposing);
}
/// <include file='doc\IDeviceContext.uex' path='docs/doc[@for="DeviceContext.Dispose1"]/*' />
internal void Dispose(bool disposing)
{
if (_disposed)
{
return;
}
if (Disposing != null)
{
Disposing(this, EventArgs.Empty);
}
_disposed = true;
switch (_dcType)
{
case DeviceContextType.Display:
Debug.Assert(disposing, "WARNING: Finalizing a Display DeviceContext.\r\nReleaseDC may fail when not called from the same thread GetDC was called from.");
((IDeviceContext)this).ReleaseHdc();
break;
case DeviceContextType.Information:
case DeviceContextType.NamedDevice:
// CreateDC and CreateIC add an HDC handle to the HandleCollector; to remove it properly we need
// to call DeleteHDC.
#if TRACK_HDC
Debug.WriteLine(DbgUtil.StackTraceToStr(String.Format("DC.DeleteHDC(hdc=0x{0:x8})", unchecked ((int)_hDC))));
#endif
IntUnsafeNativeMethods.DeleteHDC(new HandleRef(this, _hDC));
_hDC = IntPtr.Zero;
break;
case DeviceContextType.Memory:
// CreatCompatibleDC adds a GDI handle to HandleCollector, to remove it properly we need to call
// DeleteDC.
#if TRACK_HDC
Debug.WriteLine(DbgUtil.StackTraceToStr(String.Format("DC.DeleteDC(hdc=0x{0:x8})", unchecked ((int)_hDC))));
#endif
IntUnsafeNativeMethods.DeleteDC(new HandleRef(this, _hDC));
_hDC = IntPtr.Zero;
break;
// case DeviceContextType.Metafile: - not yet supported.
case DeviceContextType.Unknown:
default:
return;
// do nothing, the hdc is not owned by this object.
// in this case it is ok if disposed throught finalization.
}
DbgUtil.AssertFinalization(this, disposing);
}
public void Dispose(bool disposing)
{
if (_nativeHandle != IntPtr.Zero)
{
DbgUtil.AssertFinalization(this, disposing);
if (_ownHandle)
{
IntUnsafeNativeMethods.DeleteObject(new HandleRef(this, _nativeHandle));
}
_nativeHandle = IntPtr.Zero;
if (disposing)
{
GC.SuppressFinalize(this);
}
}
}
internal void Dispose(bool disposing)
{
if (_disposed)
{
return;
}
Disposing?.Invoke(this, EventArgs.Empty);
_disposed = true;
switch (_dcType)
{
case DeviceContextType.Display:
Debug.Assert(disposing, "WARNING: Finalizing a Display DeviceContext.\r\nReleaseDC may fail when not called from the same thread GetDC was called from.");
((IDeviceContext)this).ReleaseHdc();
break;
case DeviceContextType.Information:
case DeviceContextType.NamedDevice:
Interop.Gdi32.DeleteDC(new HandleRef(this, _hDC));
_hDC = IntPtr.Zero;
break;
case DeviceContextType.Memory:
Interop.Gdi32.DeleteDC(new HandleRef(this, _hDC));
_hDC = IntPtr.Zero;
break;
// case DeviceContextType.Metafile: - not yet supported.
case DeviceContextType.Unknown:
default:
return;
// do nothing, the hdc is not owned by this object.
// in this case it is ok if disposed throught finalization.
}
DbgUtil.AssertFinalization(this, disposing);
}
