Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / Designer / WebForms / System / Web / UI / Design / DataFieldConverter.cs / 1 / DataFieldConverter.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.UI.Design { using System; using System.Collections; using System.ComponentModel; using System.ComponentModel.Design; using System.Data; using System.Design; using System.Diagnostics; using System.Runtime.InteropServices; using System.Globalization; using System.Web.UI.Design.WebControls; ////// /// [System.Security.Permissions.SecurityPermission(System.Security.Permissions.SecurityAction.Demand, Flags=System.Security.Permissions.SecurityPermissionFlag.UnmanagedCode)] public class DataFieldConverter : TypeConverter { ////// Provides design-time support for a component's data field properties. /// ////// /// public DataFieldConverter() { } ////// Initializes a new instance of ///. /// /// /// public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType) { if (sourceType == typeof(string)) { return true; } return false; } ////// Gets a value indicating whether this converter can /// convert an object in the given source type to the native type of the converter /// using the context. /// ////// /// public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) { if (value == null) { return String.Empty; } else if (value.GetType() == typeof(string)) { return (string)value; } throw GetConvertFromException(value); } ////// Converts the given object to the converter's native type. /// ////// private DesignerDataSourceView GetView(IDesigner dataBoundControlDesigner) { DataBoundControlDesigner dbcDesigner = dataBoundControlDesigner as DataBoundControlDesigner; if (dbcDesigner != null) { return dbcDesigner.DesignerView; } else { BaseDataListDesigner baseDataListDesigner = dataBoundControlDesigner as BaseDataListDesigner; if (baseDataListDesigner != null) { return baseDataListDesigner.DesignerView; } else { RepeaterDesigner repeaterDesigner = dataBoundControlDesigner as RepeaterDesigner; if (repeaterDesigner != null) { return repeaterDesigner.DesignerView; } } } return null; } ////// Returns the DesignerDataSourceView of the given data bound control designer. /// ////// /// public override StandardValuesCollection GetStandardValues(ITypeDescriptorContext context) { object[] names = null; if (context != null) { // // This converter shouldn't be used in a multi-select scenario. If it is, it simply // returns no standard values. IComponent component = context.Instance as IComponent; if (component != null) { ISite componentSite = component.Site; if (componentSite != null) { IDesignerHost designerHost = (IDesignerHost)componentSite.GetService(typeof(IDesignerHost)); if (designerHost != null) { IDesigner dataBoundControlDesigner = designerHost.GetDesigner(component); DesignerDataSourceView view = GetView(dataBoundControlDesigner); if (view != null) { IDataSourceViewSchema schema = null; try { schema = view.Schema; } catch (Exception ex) { IComponentDesignerDebugService debugService = (IComponentDesignerDebugService)componentSite.GetService(typeof(IComponentDesignerDebugService)); if (debugService != null) { debugService.Fail(SR.GetString(SR.DataSource_DebugService_FailedCall, "DesignerDataSourceView.Schema", ex.Message)); } } if (schema != null) { IDataSourceFieldSchema[] fieldSchemas = schema.GetFields(); if (fieldSchemas != null) { names = new object[fieldSchemas.Length]; for (int i = 0; i < fieldSchemas.Length; i++) { names[i] = fieldSchemas[i].Name; } } } } if (names == null && dataBoundControlDesigner != null && dataBoundControlDesigner is IDataSourceProvider) { IDataSourceProvider dataSourceProvider = dataBoundControlDesigner as IDataSourceProvider; IEnumerable dataSource = null; if (dataSourceProvider != null) { dataSource = dataSourceProvider.GetResolvedSelectedDataSource(); } if (dataSource != null) { PropertyDescriptorCollection props = DesignTimeData.GetDataFields(dataSource); if (props != null) { ArrayList list = new ArrayList(); foreach (PropertyDescriptor propDesc in props) { list.Add(propDesc.Name); } names = list.ToArray(); } } } } } } } return new StandardValuesCollection(names); } ////// Gets the fields present within the selected data source if information about them is available. /// ////// /// public override bool GetStandardValuesExclusive(ITypeDescriptorContext context) { return false; } ////// Gets a value indicating whether the collection of standard values returned from /// ///is an exclusive /// list of possible values, using the specified context. /// /// /// public override bool GetStandardValuesSupported(ITypeDescriptorContext context) { if (context != null && context.Instance is IComponent) { // We only support the dropdown in single-select mode. return true; } return false; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved./// Gets a value indicating whether this object supports a standard set of values /// that can be picked from a list. /// ///
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- oledbmetadatacolumnnames.cs
- ScriptIgnoreAttribute.cs
- WsatTransactionFormatter.cs
- PropertyPath.cs
- RowVisual.cs
- DataSourceCacheDurationConverter.cs
- propertyentry.cs
- CollectionChangeEventArgs.cs
- SelectionProcessor.cs
- TimeZoneInfo.cs
- TypeForwardedToAttribute.cs
- JulianCalendar.cs
- BitmapCodecInfoInternal.cs
- ModelItemImpl.cs
- ActivityPreviewDesigner.cs
- FunctionNode.cs
- OleDbTransaction.cs
- FixedSOMElement.cs
- SchemaInfo.cs
- X509Chain.cs
- Constraint.cs
- GridView.cs
- XamlPathDataSerializer.cs
- DiffuseMaterial.cs
- TextSelection.cs
- DbConnectionPool.cs
- LZCodec.cs
- SqlCrossApplyToCrossJoin.cs
- HtmlInputSubmit.cs
- InvokeBase.cs
- TypeTypeConverter.cs
- WebConfigurationHost.cs
- ListDesigner.cs
- AtomContentProperty.cs
- WebControlAdapter.cs
- OptimizerPatterns.cs
- DefaultValueConverter.cs
- PerformanceCountersElement.cs
- BinHexEncoder.cs
- StorageConditionPropertyMapping.cs
- AssociativeAggregationOperator.cs
- PageWrapper.cs
- TextPointerBase.cs
- WindowPatternIdentifiers.cs
- XmlSchemaDocumentation.cs
- ThreadAttributes.cs
- UnionExpr.cs
- Ports.cs
- NativeMethods.cs
- OleDbCommandBuilder.cs
- Events.cs
- TdsParserStaticMethods.cs
- Helper.cs
- ApplicationInfo.cs
- QilList.cs
- ContextMenu.cs
- WebEventTraceProvider.cs
- TextTreeExtractElementUndoUnit.cs
- _LocalDataStoreMgr.cs
- Int32Storage.cs
- BindableTemplateBuilder.cs
- QuotedPairReader.cs
- StateItem.cs
- HtmlMeta.cs
- Stylus.cs
- MultiByteCodec.cs
- CodeTypeOfExpression.cs
- Int32Rect.cs
- LiteralTextContainerControlBuilder.cs
- MetadataItem_Static.cs
- CallbackException.cs
- WmlListAdapter.cs
- QuotedPrintableStream.cs
- DependencyPropertyValueSerializer.cs
- NamespaceEmitter.cs
- DataKey.cs
- Point3D.cs
- OverflowException.cs
- Activator.cs
- EditorZoneDesigner.cs
- XmlObjectSerializerReadContextComplex.cs
- ListViewHitTestInfo.cs
- DesignerOptions.cs
- ProtocolInformationReader.cs
- TextWriterTraceListener.cs
- LocatorPartList.cs
- RectAnimationBase.cs
- FastEncoderStatics.cs
- DragDeltaEventArgs.cs
- Membership.cs
- HttpRuntimeSection.cs
- AppearanceEditorPart.cs
- Point3DCollectionValueSerializer.cs
- cookie.cs
- Mutex.cs
- CreateParams.cs
- StylusPlugInCollection.cs
- mansign.cs
- MultidimensionalArrayItemReference.cs
- ExceptQueryOperator.cs