Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Designer / WebForms / System / Web / UI / Design / ConnectionStringsExpressionEditor.cs / 1 / ConnectionStringsExpressionEditor.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.UI.Design { using System; using System.Collections; using System.ComponentModel; using System.Configuration; using System.Design; using System.Globalization; ///public class ConnectionStringsExpressionEditor : ExpressionEditor { // Gets the collection of connection strings from config private ConnectionStringSettingsCollection GetConnectionStringSettingsCollection(IServiceProvider serviceProvider) { if (serviceProvider != null) { IWebApplication webApp = (IWebApplication)serviceProvider.GetService(typeof(IWebApplication)); if (webApp != null) { Configuration config = webApp.OpenWebConfiguration(true); if (config != null) { ConnectionStringsSection connSection = (ConnectionStringsSection)config.GetSection("connectionStrings"); if (connSection != null) { return connSection.ConnectionStrings; } } } } return null; } public override ExpressionEditorSheet GetExpressionEditorSheet(string expression, IServiceProvider serviceProvider) { return new ConnectionStringsExpressionEditorSheet(expression, this, serviceProvider); } /// public override object EvaluateExpression(string expression, object parseTimeData, Type propertyType, IServiceProvider serviceProvider) { Pair p = (Pair)parseTimeData; string name = (string)p.First; bool isConnectionString = (bool)p.Second; ConnectionStringSettingsCollection connections = GetConnectionStringSettingsCollection(serviceProvider); ConnectionStringSettings setting = null; foreach (ConnectionStringSettings item in connections) { if (String.Equals(name, item.Name, StringComparison.OrdinalIgnoreCase)) { setting = item; break; } } if (setting != null) { if (isConnectionString) { return setting.ConnectionString; } else { return setting.ProviderName; } } // If we couldn't find a connection, just return null return null; } private static string ParseExpression(string expression, out bool isConnectionString) { // Copied from ConnectionStringsExpressionBuilder.ParseExpression() const string connectionStringSuffix = ".connectionstring"; const string providerNameSuffix = ".providername"; isConnectionString = true; expression = expression.Trim(); if (expression.EndsWith(connectionStringSuffix, StringComparison.OrdinalIgnoreCase)) { return expression.Substring(0, expression.Length - connectionStringSuffix.Length); } else { if (expression.EndsWith(providerNameSuffix, StringComparison.OrdinalIgnoreCase)) { isConnectionString = false; return expression.Substring(0, expression.Length - providerNameSuffix.Length); } else { return expression; } } } private class ConnectionStringsExpressionEditorSheet : ExpressionEditorSheet { private string _connectionName; private ConnectionType _connectionType; private ConnectionStringsExpressionEditor _owner; public ConnectionStringsExpressionEditorSheet(string expression, ConnectionStringsExpressionEditor owner, IServiceProvider serviceProvider) : base(serviceProvider) { _owner = owner; bool isConnectionString; _connectionName = ParseExpression(expression, out isConnectionString); _connectionType = (isConnectionString ? ConnectionType.ConnectionString : ConnectionType.ProviderName); } [DefaultValue("")] [SRDescription(SR.ConnectionStringsExpressionEditor_ConnectionName)] [TypeConverter(typeof(ConnectionStringsTypeConverter))] public string ConnectionName { get { return _connectionName; } set { _connectionName = value; } } public override bool IsValid { get { return !String.IsNullOrEmpty(ConnectionName); } } [DefaultValue(ConnectionType.ConnectionString)] [SRDescription(SR.ConnectionStringsExpressionEditor_ConnectionType)] public ConnectionType Type { get { return _connectionType; } set { _connectionType = value; } } public override string GetExpression() { if (String.IsNullOrEmpty(_connectionName)) { return String.Empty; } string expression = _connectionName; if (Type == ConnectionType.ProviderName) { expression += ".ProviderName"; } return expression; } public enum ConnectionType { ConnectionString = 0, ProviderName = 1 } private class ConnectionStringsTypeConverter : TypeConverter { private static readonly string NoConnectionName = "(None)"; public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType) { if (sourceType == typeof(string)) { return true; } return base.CanConvertFrom(context, sourceType); } public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) { if (value is string) { if (String.Equals((string)value, NoConnectionName, StringComparison.OrdinalIgnoreCase)) { return String.Empty; } return value; } return base.ConvertFrom(context, culture, value); } public override bool CanConvertTo(ITypeDescriptorContext context, Type destType) { if (destType == typeof(string)) { return true; } return base.CanConvertTo(context, destType); } public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) { if (value is string) { if (((string)value).Length == 0) { return NoConnectionName; } return value; } return base.ConvertTo(context, culture, value, destinationType); } public override bool GetStandardValuesExclusive(ITypeDescriptorContext context) { return false; } public override bool GetStandardValuesSupported(ITypeDescriptorContext context) { if (context != null) { ConnectionStringsExpressionEditorSheet sheet = (ConnectionStringsExpressionEditorSheet)context.Instance; ConnectionStringsExpressionEditor csee = sheet._owner; ConnectionStringSettingsCollection connectionsColl = csee.GetConnectionStringSettingsCollection(sheet.ServiceProvider); if (connectionsColl != null) { return (connectionsColl.Count > 0); } } return base.GetStandardValuesSupported(context); } public override StandardValuesCollection GetStandardValues(ITypeDescriptorContext context) { if (context != null) { ConnectionStringsExpressionEditorSheet sheet = (ConnectionStringsExpressionEditorSheet)context.Instance; ConnectionStringsExpressionEditor csee = sheet._owner; ConnectionStringSettingsCollection connectionsColl = csee.GetConnectionStringSettingsCollection(sheet.ServiceProvider); if (connectionsColl != null) { ArrayList valueList = new ArrayList(); foreach (ConnectionStringSettings setting in connectionsColl) { valueList.Add(setting.Name); } valueList.Sort(); valueList.Add(String.Empty); return new StandardValuesCollection(valueList); } } return base.GetStandardValues(context); } } } } } // 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
- SplashScreenNativeMethods.cs
- XmlUtf8RawTextWriter.cs
- MouseEvent.cs
- DrawingContextWalker.cs
- SyntaxCheck.cs
- CodeCatchClause.cs
- ProfileSettingsCollection.cs
- TablePattern.cs
- SocketAddress.cs
- XpsLiterals.cs
- NavigatorInput.cs
- AttachedPropertyBrowsableAttribute.cs
- Calendar.cs
- DataSourceSelectArguments.cs
- VersionPair.cs
- ObfuscationAttribute.cs
- XmlSignatureProperties.cs
- MetadataItemEmitter.cs
- BufferedGraphicsContext.cs
- Handle.cs
- DataRecordInternal.cs
- WebPartHeaderCloseVerb.cs
- Debugger.cs
- DependencyObjectProvider.cs
- DefaultBinder.cs
- TabItem.cs
- MetafileHeader.cs
- MethodToken.cs
- Operators.cs
- PaintEvent.cs
- ValidatingPropertiesEventArgs.cs
- CustomErrorsSectionWrapper.cs
- CompilerGeneratedAttribute.cs
- StandardBindingElement.cs
- Action.cs
- AbsoluteQuery.cs
- PlaceHolder.cs
- Crypto.cs
- ReachFixedDocumentSerializer.cs
- ICspAsymmetricAlgorithm.cs
- SimpleType.cs
- SystemIPGlobalStatistics.cs
- SimpleWebHandlerParser.cs
- DataGridHeaderBorder.cs
- SuppressMergeCheckAttribute.cs
- DebugViewWriter.cs
- LassoHelper.cs
- ComponentEditorPage.cs
- WmlTextBoxAdapter.cs
- Transform3D.cs
- ResourceSet.cs
- KeyFrames.cs
- DefaultTraceListener.cs
- ProfilePropertyMetadata.cs
- SystemWebExtensionsSectionGroup.cs
- TextDecorationCollectionConverter.cs
- SevenBitStream.cs
- DropDownHolder.cs
- BindingSourceDesigner.cs
- InkCollectionBehavior.cs
- ListCollectionView.cs
- SelectionRangeConverter.cs
- MessageQueueEnumerator.cs
- ControlCachePolicy.cs
- BitmapSizeOptions.cs
- KeyProperty.cs
- SqlAliasesReferenced.cs
- FakeModelItemImpl.cs
- ApplicationFileParser.cs
- FontWeight.cs
- NeutralResourcesLanguageAttribute.cs
- NameValueConfigurationCollection.cs
- ListViewDeleteEventArgs.cs
- DataTrigger.cs
- WriteStateInfoBase.cs
- WebBrowserDesigner.cs
- DataTablePropertyDescriptor.cs
- Rect3DConverter.cs
- IgnorePropertiesAttribute.cs
- Compiler.cs
- XmlCharCheckingReader.cs
- MdiWindowListStrip.cs
- TraceHandler.cs
- DbConnectionPoolGroupProviderInfo.cs
- GenericArgumentsUpdater.cs
- CodeAccessSecurityEngine.cs
- MD5CryptoServiceProvider.cs
- DataGridPagingPage.cs
- DeferredBinaryDeserializerExtension.cs
- OdbcHandle.cs
- MyContact.cs
- TransactionContext.cs
- ThemeableAttribute.cs
- PeerFlooder.cs
- DynamicILGenerator.cs
- HttpWebResponse.cs
- SafeMILHandleMemoryPressure.cs
- ProxyHwnd.cs
- MatchSingleFxEngineOpcode.cs
- CorePropertiesFilter.cs