Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / WinForms / Managed / System / WinForms / ComponentModel / COM2Interop / BaseCAMarshaler.cs / 1 / BaseCAMarshaler.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Windows.Forms.ComponentModel.Com2Interop { using System.Runtime.Remoting; using System.Runtime.InteropServices; using System.ComponentModel; using System.Diagnostics; using System; using Microsoft.Win32; using System.Globalization; ////// /// This class performs basic operation for marshaling data passed /// in from native in one of the CA*** structs (CADWORD, CAUUID, etc), /// which are structs in which the first word is the number of elements /// and the second is a pointer to an array of such elements. /// /// internal abstract class BaseCAMarshaler { private static TraceSwitch CAMarshalSwitch = new TraceSwitch("CAMarshal", "BaseCAMarshaler: Debug CA* struct marshaling"); private IntPtr caArrayAddress; private int count; private object[] itemArray; ////// /// Base ctor /// protected BaseCAMarshaler(NativeMethods.CA_STRUCT caStruct) : base() { if (caStruct == null) { count = 0; Debug.WriteLineIf(CAMarshalSwitch.TraceVerbose, "BaseCAMarshaler: null passed in!"); } // first 4 bytes is the count count = caStruct.cElems; caArrayAddress = caStruct.pElems; Debug.WriteLineIf(CAMarshalSwitch.TraceVerbose, "Marshaling " + count.ToString(CultureInfo.InvariantCulture) + " items of type " + ItemType.Name); } ~BaseCAMarshaler() { try { if (itemArray == null && caArrayAddress != IntPtr.Zero) { object[] items = Items; } } catch { } } protected abstract Array CreateArray(); ////// /// Returns the type of item this marshaler will /// return in the items array. /// public abstract Type ItemType { get; } ////// /// Returns the count of items that will be or have been /// marshaled. /// public int Count { get { return count; } } ////// /// The marshaled items. /// public virtual object[] Items { get { try { if (itemArray == null) { itemArray = Get_Items(); } } catch (Exception ex) { Debug.WriteLineIf(CAMarshalSwitch.TraceVerbose, "Marshaling failed: " + ex.GetType().Name + ", " + ex.Message); } #if DEBUG if (itemArray != null) { Debug.WriteLineIf(CAMarshalSwitch.TraceVerbose, "Marshaled: " + itemArray.Length.ToString(CultureInfo.InvariantCulture) + " items, array type=" + itemArray.GetType().Name); } #endif return itemArray; } } ////// /// Override this member to perform marshalling of a single item /// given it's native address. /// protected abstract object GetItemFromAddress(IntPtr addr); // Retrieve the items private object[] Get_Items() { // cycle through the addresses and get an item for each addr IntPtr addr; Array items = new object[Count]; //cpb vs38262 System.Array.CreateInstance(this.ItemType,count); object curItem; for (int i = 0; i < count; i++) { try { addr = Marshal.ReadIntPtr(caArrayAddress, i * IntPtr.Size); curItem = GetItemFromAddress(addr); if (curItem != null && ItemType.IsInstanceOfType(curItem)) { items.SetValue(curItem, i); } Debug.WriteLineIf(CAMarshalSwitch.TraceVerbose, "Marshaled " + ItemType.Name + " item, value=" + (curItem == null ? "(null)" : curItem.ToString())); } catch (Exception ex) { Debug.WriteLineIf(CAMarshalSwitch.TraceVerbose, "Failed to marshal " + ItemType.Name + " item, exception=" + ex.GetType().Name +", " +ex.Message); } } // free the array Marshal.FreeCoTaskMem(caArrayAddress); caArrayAddress = IntPtr.Zero; return(object[])items; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- XmlSchemaGroupRef.cs
- RegexReplacement.cs
- ExpressionUtilities.cs
- PictureBox.cs
- SqlBulkCopy.cs
- SmtpException.cs
- TriggerCollection.cs
- UserPreferenceChangedEventArgs.cs
- PropertyChangingEventArgs.cs
- MultilineStringConverter.cs
- OracleDateTime.cs
- XXXInfos.cs
- TextBoxAutoCompleteSourceConverter.cs
- HtmlImage.cs
- NetworkStream.cs
- SchemaMapping.cs
- Group.cs
- ReflectionServiceProvider.cs
- WeakHashtable.cs
- ProtocolsSection.cs
- ActiveXHost.cs
- ValidationHelpers.cs
- ResourceWriter.cs
- MatrixKeyFrameCollection.cs
- CustomAttributeFormatException.cs
- XmlProcessingInstruction.cs
- TrustManagerMoreInformation.cs
- ComponentEvent.cs
- DrawingVisualDrawingContext.cs
- ListQueryResults.cs
- MissingFieldException.cs
- SrgsRule.cs
- ObjectQuery.cs
- NativeMethods.cs
- RequiredFieldValidator.cs
- MarkerProperties.cs
- ErrorHandlerModule.cs
- SqlConnectionPoolProviderInfo.cs
- OracleLob.cs
- SafeFileMappingHandle.cs
- DataGridViewDataErrorEventArgs.cs
- GenerateScriptTypeAttribute.cs
- ProgressBarAutomationPeer.cs
- ControlCachePolicy.cs
- SchemaNames.cs
- ParserStreamGeometryContext.cs
- GlyphElement.cs
- ETagAttribute.cs
- SafeCryptoHandles.cs
- SecurityTokenSerializer.cs
- DocumentPage.cs
- ToolStripSeparator.cs
- PatternMatcher.cs
- DataFieldEditor.cs
- Clock.cs
- DbConnectionPoolOptions.cs
- ObjectAssociationEndMapping.cs
- SelectionWordBreaker.cs
- Errors.cs
- QilPatternVisitor.cs
- DateTimeConverter2.cs
- XmlSerializer.cs
- AmbientProperties.cs
- RoleService.cs
- ConnectionsZone.cs
- CssTextWriter.cs
- XmlSchemaComplexType.cs
- TabControl.cs
- MailHeaderInfo.cs
- SpellCheck.cs
- TableCellAutomationPeer.cs
- VersionConverter.cs
- DriveNotFoundException.cs
- MessageHeaderInfoTraceRecord.cs
- PathGeometry.cs
- SqlDataSource.cs
- messageonlyhwndwrapper.cs
- CodeDelegateCreateExpression.cs
- RijndaelManagedTransform.cs
- ClassValidator.cs
- PipeStream.cs
- GenericAuthenticationEventArgs.cs
- TimeSpanConverter.cs
- KeyValueInternalCollection.cs
- ProtocolsConfiguration.cs
- ExceptionAggregator.cs
- MediaContextNotificationWindow.cs
- SecurityManager.cs
- ListControlActionList.cs
- CSharpCodeProvider.cs
- SqlConnectionManager.cs
- BrushMappingModeValidation.cs
- BufferedReadStream.cs
- CoreSwitches.cs
- CmsUtils.cs
- XmlNodeComparer.cs
- ValidationVisibilityAttribute.cs
- SafeLibraryHandle.cs
- TimeSpanConverter.cs
- GeneralTransformGroup.cs