Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / WinForms / Managed / System / WinForms / RelatedCurrencyManager.cs / 1305376 / RelatedCurrencyManager.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Windows.Forms { using System; using Microsoft.Win32; using System.Diagnostics; using System.Diagnostics.CodeAnalysis; using System.ComponentModel; using System.Collections; using System.Collections.Generic; ////// /// internal class RelatedCurrencyManager : CurrencyManager { BindingManagerBase parentManager; string dataField; PropertyDescriptor fieldInfo; static ListRepresents the child version of the System.Windows.Forms.ListManager /// that is used when a parent/child relationship exists in a System.Windows.Forms.DataSet. ///IgnoreItemChangedTable = new List (); [ SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors") // If the constructor does not set the dataSource // it would be a breaking change. ] internal RelatedCurrencyManager(BindingManagerBase parentManager, string dataField) : base(null) { Bind(parentManager, dataField); } internal void Bind(BindingManagerBase parentManager, string dataField) { Debug.Assert(parentManager != null, "How could this be a null parentManager."); // Unwire previous BindingManagerBase UnwireParentManager(this.parentManager); this.parentManager = parentManager; this.dataField = dataField; this.fieldInfo = parentManager.GetItemProperties().Find(dataField, true); if (fieldInfo == null || !typeof(IList).IsAssignableFrom(fieldInfo.PropertyType)) { throw new ArgumentException(SR.GetString(SR.RelatedListManagerChild, dataField)); } this.finalType = fieldInfo.PropertyType; // Wire new BindingManagerBase WireParentManager(this.parentManager); ParentManager_CurrentItemChanged(parentManager, EventArgs.Empty); } private void UnwireParentManager(BindingManagerBase bmb) { if (bmb != null) { bmb.CurrentItemChanged -= new EventHandler(ParentManager_CurrentItemChanged); if (bmb is CurrencyManager) { (bmb as CurrencyManager).MetaDataChanged -= new EventHandler(ParentManager_MetaDataChanged); } } } private void WireParentManager(BindingManagerBase bmb) { if (bmb != null) { bmb.CurrentItemChanged += new EventHandler(ParentManager_CurrentItemChanged); if (bmb is CurrencyManager) { (bmb as CurrencyManager).MetaDataChanged += new EventHandler(ParentManager_MetaDataChanged); } } } internal override PropertyDescriptorCollection GetItemProperties(PropertyDescriptor[] listAccessors) { PropertyDescriptor[] accessors; if (listAccessors != null && listAccessors.Length > 0) { accessors = new PropertyDescriptor[listAccessors.Length + 1]; listAccessors.CopyTo(accessors, 1); } else { accessors = new PropertyDescriptor[1]; } // Set this accessor (add to the beginning) accessors[0] = this.fieldInfo; // Get props return parentManager.GetItemProperties(accessors); } /// /// /// public override PropertyDescriptorCollection GetItemProperties() { return GetItemProperties(null); } //Gets the properties of the item. ///// internal override string GetListName() { string name = GetListName(new ArrayList()); if (name.Length > 0) { return name; } return base.GetListName(); } ///Gets the name of the list. ///// /// protected internal override string GetListName(ArrayList listAccessors) { listAccessors.Insert(0, fieldInfo); return parentManager.GetListName(listAccessors); } private void ParentManager_MetaDataChanged(object sender, EventArgs e) { // Propagate MetaDataChanged events from the parent manager base.OnMetaDataChanged(e); } private void ParentManager_CurrentItemChanged(object sender, EventArgs e) { if (IgnoreItemChangedTable.Contains(parentManager)) { return; } int oldlistposition = this.listposition; // we only pull the data from the controls into the backEnd. we do not care about keeping the lastGoodKnownRow // when we are about to change the entire list in this currencymanager. try { PullData(); } catch (Exception ex) { OnDataError(ex); } if (parentManager is CurrencyManager) { CurrencyManager curManager = (CurrencyManager) parentManager; if (curManager.Count > 0) { // Parent list has a current row, so get the related list from the relevant property on that row. SetDataSource(fieldInfo.GetValue(curManager.Current)); listposition = (Count > 0 ? 0 : -1); } else { // APPCOMPAT: bring back the Everett behavior where the currency manager adds an item and // then it cancels the addition. // vsw 427731. // // really, really hocky. // will throw if the list in the curManager is not IBindingList // and this will fail if the IBindingList does not have list change notification. read on.... // when a new item will get added to an empty parent table, // the table will fire OnCurrentChanged and this method will get executed again // allowing us to set the data source to an object with the right properties (so we can show // metadata at design time). // we then call CancelCurrentEdit to remove the dummy row, but making sure to ignore any // OnCurrentItemChanged that results from this action (to avoid infinite recursion) curManager.AddNew(); try { IgnoreItemChangedTable.Add(curManager); curManager.CancelCurrentEdit(); } finally { if (IgnoreItemChangedTable.Contains(curManager)) { IgnoreItemChangedTable.Remove(curManager); } } } } else { // Case where the parent is not a list, but a single object SetDataSource(fieldInfo.GetValue(parentManager.Current)); listposition = (Count > 0 ? 0 : -1); } if (oldlistposition != listposition) OnPositionChanged(EventArgs.Empty); OnCurrentChanged(EventArgs.Empty); OnCurrentItemChanged(EventArgs.Empty); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.Gets the name of the specified list. ///
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- ResourceSetExpression.cs
- SafeViewOfFileHandle.cs
- GridEntry.cs
- DataTablePropertyDescriptor.cs
- _SingleItemRequestCache.cs
- MessageEncodingBindingElement.cs
- XmlQualifiedName.cs
- SymbolType.cs
- ServiceDeploymentInfo.cs
- EUCJPEncoding.cs
- _OSSOCK.cs
- ListParagraph.cs
- ILGenerator.cs
- New.cs
- TextRenderer.cs
- ToolBar.cs
- MenuCommand.cs
- AspCompat.cs
- TimerElapsedEvenArgs.cs
- ToolStripPanelSelectionGlyph.cs
- DataGridRowClipboardEventArgs.cs
- BlockCollection.cs
- CodeIterationStatement.cs
- SelectionPatternIdentifiers.cs
- TableItemPatternIdentifiers.cs
- M3DUtil.cs
- InternalPermissions.cs
- DocumentViewerAutomationPeer.cs
- XomlDesignerLoader.cs
- StylusSystemGestureEventArgs.cs
- QueryOutputWriterV1.cs
- __ComObject.cs
- UnsafeNativeMethodsTablet.cs
- ConstructorExpr.cs
- WebRequestModuleElement.cs
- NativeDirectoryServicesQueryAPIs.cs
- MatrixCamera.cs
- ListViewDataItem.cs
- shaperfactory.cs
- GridEntry.cs
- DefaultIfEmptyQueryOperator.cs
- dsa.cs
- WorkerRequest.cs
- PasswordPropertyTextAttribute.cs
- SettingsBindableAttribute.cs
- NameValuePermission.cs
- Span.cs
- DataGridTablesFactory.cs
- BitVector32.cs
- AutomationPropertyInfo.cs
- DataPagerFieldItem.cs
- DelegatingConfigHost.cs
- RangeBase.cs
- PhysicalFontFamily.cs
- mongolianshape.cs
- UnsafeNetInfoNativeMethods.cs
- QuarticEase.cs
- TailPinnedEventArgs.cs
- StaticSiteMapProvider.cs
- InvalidFilterCriteriaException.cs
- EntityDataSourceReferenceGroup.cs
- ValidatedControlConverter.cs
- GridView.cs
- StringReader.cs
- SubtreeProcessor.cs
- _OSSOCK.cs
- MonikerSyntaxException.cs
- TemplateAction.cs
- ClipboardData.cs
- TrackBar.cs
- RecordManager.cs
- EmptyStringExpandableObjectConverter.cs
- DbDataSourceEnumerator.cs
- ListCollectionView.cs
- ObjectDataSource.cs
- PowerStatus.cs
- DesignerHelpers.cs
- ExpressionDumper.cs
- WebPartCloseVerb.cs
- MailAddressCollection.cs
- ToolStripPanelRenderEventArgs.cs
- XamlToRtfParser.cs
- MenuItemCollectionEditorDialog.cs
- CodeLabeledStatement.cs
- SQLSingle.cs
- ReadOnlyCollectionBase.cs
- SignatureHelper.cs
- ComboBoxItem.cs
- XmlEntity.cs
- basenumberconverter.cs
- VirtualDirectoryMappingCollection.cs
- XmlCDATASection.cs
- Comparer.cs
- AnnotationService.cs
- DurableInstanceManager.cs
- Condition.cs
- IEnumerable.cs
- SubpageParaClient.cs
- FaultDesigner.cs
- EventDescriptor.cs