Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Extensions / UI / WebControls / Expressions / SearchExpression.cs / 1305376 / SearchExpression.cs
#if ORYX_VNEXT namespace Microsoft.Web.Data.UI.WebControls.Expressions { #else namespace System.Web.UI.WebControls.Expressions { #endif using System; using System.Collections; using System.Collections.Generic; using System.Globalization; using System.Linq; using System.Linq.Expressions; using System.Web.Resources; using System.Web.UI; using System.Web.UI.WebControls; public class SearchExpression : ParameterDataSourceExpression { public string DataFields { get { return (string)ViewState["DataFields"] ?? String.Empty; } set { ViewState["DataFields"] = value; } } public SearchType SearchType { get { object o = ViewState["SearchType"]; return o != null ? (SearchType)o : SearchType.StartsWith; } set { ViewState["SearchType"] = value; } } public StringComparison ComparisonType { get { object o = ViewState["ComparisonType"]; return o != null ? (StringComparison)o : StringComparison.OrdinalIgnoreCase; } set { ViewState["ComparisonType"] = value; } } public override IQueryable GetQueryable(IQueryable source) { if (source == null) { return null; } if ((DataFields == null) || String.IsNullOrEmpty(DataFields.Trim())) { throw new InvalidOperationException(AtlasWeb.Expressions_DataFieldRequired); } IDictionaryvalues = GetValues(); if (values.Count == 0) { throw new InvalidOperationException(AtlasWeb.SearchExpression_ParameterRequired); } string query = Convert.ToString(values.First().Value, CultureInfo.CurrentCulture); if (String.IsNullOrEmpty(query)) { return null; } string[] properties = DataFields.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries); // Use the or expression to or the fields together List searchExpressions = new List (); ParameterExpression parameterExpression = Expression.Parameter(source.ElementType, String.Empty); foreach (string p in properties) { Expression property = ExpressionHelper.CreatePropertyExpression(parameterExpression, p.Trim()); searchExpressions.Add(CreateCallExpression(property, query)); } return ExpressionHelper.Where(source, Expression.Lambda(ExpressionHelper.Or(searchExpressions), parameterExpression)); } private Expression CreateCallExpression(Expression property, string query) { // LINQ to SQL does not support the overloads StartsWith(string, StringComparer) or EndsWith(string, StringComparer) // and Contains has not overload that takes a StringComparer if (SearchType == SearchType.Contains || (ViewState["ComparisonType"] == null)) { return Expression.Call(property, SearchType.ToString(), Type.EmptyTypes, Expression.Constant(query, property.Type)); } return Expression.Call(property, SearchType.ToString(), Type.EmptyTypes, Expression.Constant(query, property.Type), Expression.Constant(ComparisonType)); } } } // 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
- ColumnWidthChangedEvent.cs
- TreeNodeCollection.cs
- RecommendedAsConfigurableAttribute.cs
- DataGridTableCollection.cs
- SqlTriggerContext.cs
- ListViewGroupConverter.cs
- sqlnorm.cs
- GrammarBuilderRuleRef.cs
- ManualResetEvent.cs
- DataServiceProviderMethods.cs
- ObjectViewEntityCollectionData.cs
- CommaDelimitedStringAttributeCollectionConverter.cs
- XPathParser.cs
- SmtpSpecifiedPickupDirectoryElement.cs
- Line.cs
- AutoCompleteStringCollection.cs
- ServiceDescriptionData.cs
- SchemaCollectionPreprocessor.cs
- columnmapkeybuilder.cs
- Page.cs
- GenerateTemporaryTargetAssembly.cs
- Variable.cs
- BitmapData.cs
- GeometryCombineModeValidation.cs
- XmlDictionaryWriter.cs
- ChtmlTextBoxAdapter.cs
- InkCanvasAutomationPeer.cs
- CryptoProvider.cs
- XmlSchemaInferenceException.cs
- AsymmetricSecurityBindingElement.cs
- DirectionalLight.cs
- ColorKeyFrameCollection.cs
- CommandDevice.cs
- FixUpCollection.cs
- SQLByteStorage.cs
- HostingEnvironmentException.cs
- RunWorkerCompletedEventArgs.cs
- shaperfactoryquerycachekey.cs
- ListViewItem.cs
- WebPartTransformerAttribute.cs
- DoubleIndependentAnimationStorage.cs
- DataRowComparer.cs
- WorkflowTransactionOptions.cs
- HtmlInputText.cs
- ValidatorCompatibilityHelper.cs
- SetIterators.cs
- DragDeltaEventArgs.cs
- CacheManager.cs
- Manipulation.cs
- FieldBuilder.cs
- ArrangedElement.cs
- Quaternion.cs
- Classification.cs
- XmlSchemaGroupRef.cs
- RemotingException.cs
- FontStretch.cs
- SoapExtensionStream.cs
- DataTablePropertyDescriptor.cs
- ExtendedProperty.cs
- XmlNotation.cs
- CodeDefaultValueExpression.cs
- WizardForm.cs
- CodeDOMProvider.cs
- WindowsListViewSubItem.cs
- RtfToken.cs
- SchemaImporterExtensionElementCollection.cs
- followingquery.cs
- DataPagerField.cs
- ProgressBar.cs
- JobPageOrder.cs
- PublisherMembershipCondition.cs
- DBConnectionString.cs
- TouchDevice.cs
- XmlDataSourceView.cs
- SynchronizingStream.cs
- WhiteSpaceTrimStringConverter.cs
- BevelBitmapEffect.cs
- AudioLevelUpdatedEventArgs.cs
- VisualCollection.cs
- BidPrivateBase.cs
- ListParagraph.cs
- RouteParameter.cs
- DecimalAnimationBase.cs
- RtfControlWordInfo.cs
- DataViewManager.cs
- WebPartExportVerb.cs
- PropertyPath.cs
- RootProfilePropertySettingsCollection.cs
- CodeComment.cs
- ObjectDisposedException.cs
- UnmanagedMemoryStream.cs
- HotCommands.cs
- XmlSerializerAssemblyAttribute.cs
- AlgoModule.cs
- SerializationObjectManager.cs
- ResourceDescriptionAttribute.cs
- CompositeDataBoundControl.cs
- RichTextBoxAutomationPeer.cs
- SizeValueSerializer.cs
- ContainerFilterService.cs