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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));
}
 
}
}
class
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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; }
}
error
1
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.
gistfile1.txt
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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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