Created
December 1, 2012 10:39
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Error from http://programmers.stackexchange.com/questions/176826/creating-a-predicate-builder-extension-method
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| public ContactListDto Filter(IQueryable<Contact> contactList, DataSourceRequest request) | |
| { | |
| .. | |
| if (request.Filters.Any()) | |
| { | |
| //Single column | |
| var filter = request.Filters[0] as FilterDescriptor; | |
| if (filter != null) | |
| { | |
| var cb = new ContactBuilder3(filter); | |
| contactList = contactList.Where(contact => cb.Selector(contact).Any(cb.Predicate)); | |
| } | |
| } | |
| } |
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| public ContactBuilder3(FilterDescriptor filter) | |
| { | |
| switch (filter.Member) | |
| { | |
| case "Name": | |
| Selector = (contact) => new[] | |
| { | |
| contact.Firstname, | |
| contact.Lastname, | |
| contact.Firstname + " " + contact.Lastname | |
| }; | |
| break; | |
| default: | |
| // some code that uses reflection, avoids having | |
| // a case for every column name | |
| // Retrieve the public instance property of a matching name | |
| // (case sensetive) and its type is string. | |
| var property = typeof (Contact) | |
| .GetProperties(BindingFlags.Public | BindingFlags.Instance) | |
| .FirstOrDefault(prop => | |
| string.Equals(prop.Name, filter.Member) && | |
| prop.PropertyType == typeof (string)); | |
| if (property == null) | |
| { | |
| throw new InvalidOperationException( | |
| "Column name does not exist"); | |
| } | |
| Selector = (contact) => new[] {(string) property.GetValue(contact, null)}; | |
| break; | |
| } | |
| switch (filter.Operator) | |
| { | |
| case FilterOperator.StartsWith: | |
| Predicate = filter.Value.ToString().StartsWith; | |
| break; | |
| case FilterOperator.Contains: | |
| Predicate = filter.Value.ToString().Contains; | |
| break; | |
| case FilterOperator.IsEqualTo: | |
| Predicate = filter.Value.ToString().Equals; | |
| break; | |
| } | |
| } | |
| public Func<Contact, IEnumerable<string>> Selector { get; private set; } | |
| public Func<string, bool> Predicate { get; private set; } | |
| } |
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| Could not parse expression 'Invoke(value(System.Func`2[Domain.Model.Entities.Contact,System.Collections.Generic.IEnumerable`1[System.String]]), contact).Any(value(System.Func`2[System.String,System.Boolean]))': Object of type 'System.Linq.Expressions.ConstantExpression' cannot be converted to type 'System.Linq.Expressions.LambdaExpression'. If you tried to pass a delegate instead of a LambdaExpression, this is not supported because delegates are not parsable expressions. |
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| Remotion.Linq.Parsing.ParserException | |
| Could not parse expression 'Invoke(value(System.Func`2[Domain.Model.Entities.Contact,System.Collections.Generic.IEnumerable`1[System.String]]), contact).Any(value(System.Func`2[System.String,System.Boolean]))': Object of type 'System.Linq.Expressions.ConstantExpression' cannot be converted to type 'System.Linq.Expressions.LambdaExpression'. If you tried to pass a delegate instead of a LambdaExpression, this is not supported because delegates are not parsable expressions. | |
| Remotion.Linq.Parsing.ParserException: Could not parse expression 'Invoke(value(System.Func`2[Domain.Model.Entities.Contact,System.Collections.Generic.IEnumerable`1[System.String]]), contact).Any(value(System.Func`2[System.String,System.Boolean]))': Object of type 'System.Linq.Expressions.ConstantExpression' cannot be converted to type 'System.Linq.Expressions.LambdaExpression'. If you tried to pass a delegate instead of a LambdaExpression, this is not supported because delegates are not parsable expressions. | |
| at Remotion.Linq.Parsing.Structure.MethodCallExpressionParser.CreateExpressionNode(Type nodeType, MethodCallExpressionParseInfo parseInfo, Object[] additionalConstructorParameters) | |
| at Remotion.Linq.Parsing.Structure.MethodCallExpressionParser.Parse(String associatedIdentifier, IExpressionNode source, IEnumerable`1 arguments, MethodCallExpression expressionToParse) | |
| at Remotion.Linq.Parsing.Structure.ExpressionTreeParser.ParseMethodCallExpression(MethodCallExpression methodCallExpression, String associatedIdentifier) | |
| at Remotion.Linq.Parsing.Structure.ExpressionTreeParser.ParseNode(Expression expression, String associatedIdentifier) | |
| at Remotion.Linq.Parsing.Structure.ExpressionTreeParser.ParseTree(Expression expressionTree) | |
| at Remotion.Linq.Parsing.Structure.QueryParser.GetParsedQuery(Expression expressionTreeRoot) | |
| at Remotion.Linq.Parsing.ExpressionTreeVisitors.SubQueryFindingExpressionTreeVisitor.CreateSubQueryNode(MethodCallExpression methodCallExpression) | |
| at Remotion.Linq.Parsing.ExpressionTreeVisitors.SubQueryFindingExpressionTreeVisitor.VisitExpression(Expression expression) | |
| at Remotion.Linq.Parsing.ExpressionTreeVisitor.VisitLambdaExpression(LambdaExpression expression) | |
| at Remotion.Linq.Parsing.ExpressionTreeVisitor.VisitExpression(Expression expression) | |
| at Remotion.Linq.Parsing.ExpressionTreeVisitors.SubQueryFindingExpressionTreeVisitor.VisitExpression(Expression expression) | |
| at Remotion.Linq.Parsing.ExpressionTreeVisitors.SubQueryFindingExpressionTreeVisitor.Process(Expression expressionTree, INodeTypeProvider nodeTypeProvider) | |
| at Remotion.Linq.Parsing.Structure.MethodCallExpressionParser.ProcessArgumentExpression(Expression argumentExpression) | |
| at Remotion.Linq.Parsing.Structure.MethodCallExpressionParser.<Parse>b__0(Expression expr) | |
| at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext() | |
| at System.Linq.Buffer`1..ctor(IEnumerable`1 source) | |
| at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source) | |
| at Remotion.Linq.Parsing.Structure.MethodCallExpressionParser.Parse(String associatedIdentifier, IExpressionNode source, IEnumerable`1 arguments, MethodCallExpression expressionToParse) | |
| at Remotion.Linq.Parsing.Structure.ExpressionTreeParser.ParseMethodCallExpression(MethodCallExpression methodCallExpression, String associatedIdentifier) | |
| at Remotion.Linq.Parsing.Structure.ExpressionTreeParser.ParseNode(Expression expression, String associatedIdentifier) | |
| at Remotion.Linq.Parsing.Structure.ExpressionTreeParser.ParseMethodCallExpression(MethodCallExpression methodCallExpression, String associatedIdentifier) | |
| at Remotion.Linq.Parsing.Structure.ExpressionTreeParser.ParseNode(Expression expression, String associatedIdentifier) | |
| at Remotion.Linq.Parsing.Structure.ExpressionTreeParser.ParseTree(Expression expressionTree) | |
| at Remotion.Linq.Parsing.Structure.QueryParser.GetParsedQuery(Expression expressionTreeRoot) | |
| at NHibernate.Linq.NhRelinqQueryParser.Parse(Expression expression) | |
| at NHibernate.Linq.NhLinqExpression.Translate(ISessionFactoryImplementor sessionFactory) | |
| at NHibernate.Hql.Ast.ANTLR.ASTQueryTranslatorFactory.CreateQueryTranslators(String queryIdentifier, IQueryExpression queryExpression, String collectionRole, Boolean shallow, IDictionary`2 filters, ISessionFactoryImplementor factory) | |
| at NHibernate.Engine.Query.HQLExpressionQueryPlan.CreateTranslators(String expressionStr, IQueryExpression queryExpression, String collectionRole, Boolean shallow, IDictionary`2 enabledFilters, ISessionFactoryImplementor factory) | |
| at NHibernate.Engine.Query.HQLExpressionQueryPlan..ctor(String expressionStr, IQueryExpression queryExpression, String collectionRole, Boolean shallow, IDictionary`2 enabledFilters, ISessionFactoryImplementor factory) | |
| at NHibernate.Engine.Query.HQLExpressionQueryPlan..ctor(String expressionStr, IQueryExpression queryExpression, Boolean shallow, IDictionary`2 enabledFilters, ISessionFactoryImplementor factory) | |
| at NHibernate.Engine.Query.QueryPlanCache.GetHQLQueryPlan(IQueryExpression queryExpression, Boolean shallow, IDictionary`2 enabledFilters) | |
| at NHibernate.Impl.AbstractSessionImpl.GetHQLQueryPlan(IQueryExpression queryExpression, Boolean shallow) | |
| at NHibernate.Impl.AbstractSessionImpl.CreateQuery(IQueryExpression queryExpression) | |
| at NHibernate.Linq.DefaultQueryProvider.PrepareQuery(Expression expression, IQuery& query, NhLinqExpression& nhQuery) | |
| at NHibernate.Linq.DefaultQueryProvider.Execute(Expression expression) | |
| at NHibernate.Linq.DefaultQueryProvider.Execute[TResult](Expression expression) | |
| at System.Linq.Queryable.Count[TSource](IQueryable`1 source) | |
| at Cms.Mvc.Helpers.PredicateBuilders.ContactBuilder.Filter(IQueryable`1 contactList, DataSourceRequest request) in e:\WebSites\Popcorn Mail\popcorn-mail\Website\CMS.Website\Cms.Mvc\Helpers\PredicateBuilders\ContactBuilder.cs:line 50 | |
| at Cms.Mvc.Controllers.AJaxClientController.ListContact(Int64 id, DataSourceRequest request) in e:\WebSites\Popcorn Mail\popcorn-mail\Website\CMS.Website\Cms.Mvc\Controllers\AjaxClientController.cs:line 112 | |
| at lambda_method(Closure , ControllerBase , Object[] ) | |
| at System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters) | |
| at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) | |
| at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) | |
| at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass42.<BeginInvokeSynchronousActionMethod>b__41() | |
| at System.Web.Mvc.Async.AsyncResultWrapper.<>c__DisplayClass8`1.<BeginSynchronous>b__7(IAsyncResult _) | |
| at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`1.End() | |
| at System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult) | |
| at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass37.<>c__DisplayClass39.<BeginInvokeActionMethodWithFilters>b__33() | |
| at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass4f.<InvokeActionMethodFilterAsynchronously>b__49() | |
| at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass4f.<InvokeActionMethodFilterAsynchronously>b__49() | |
| at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass37.<BeginInvokeActionMethodWithFilters>b__36(IAsyncResult asyncResult) | |
| at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`1.End() | |
| at System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) | |
| at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass25.<>c__DisplayClass2a.<BeginInvokeAction>b__20() | |
| at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass25.<BeginInvokeAction>b__22(IAsyncResult asyncResult) | |
| at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`1.End() | |
| at System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) | |
| at System.Web.Mvc.Controller.<>c__DisplayClass1d.<BeginExecuteCore>b__18(IAsyncResult asyncResult) | |
| at System.Web.Mvc.Async.AsyncResultWrapper.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) | |
| at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`1.End() | |
| at System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) | |
| at System.Web.Mvc.Async.AsyncResultWrapper.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) | |
| at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`1.End() | |
| at System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) | |
| at System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) | |
| at System.Web.Mvc.MvcHandler.<>c__DisplayClass8.<BeginProcessRequest>b__3(IAsyncResult asyncResult) | |
| at System.Web.Mvc.Async.AsyncResultWrapper.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) | |
| at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`1.End() | |
| at System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) | |
| at System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) | |
| at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() | |
| at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) |
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