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POFilter large collection
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copied!<p>I have a collection of MyClass objects and i need to filter it by a combination of 17 fileds. </p> <p>I implemented an object MyClassFilter with the 17 possible fields and the condition for each one and a method:</p> <pre><code>bool PassFilter(MyClass ObjectToEvaluate) { return PassFilterVal(this.Workstream, ObjectToEvaluate.WorkStream) && PassFilterVal(this.AssignedTo, ObjectToEvaluate.AssignedTo) && PassFilterVal(this.ProcessingGroup, ObjectToEvaluate.ProcessingGroup) && PassFilterVal(this.ScheduledStart, ObjectToEvaluate.ScheduledStart) && PassFilterVal(this.EntityName, ObjectToEvaluate.EntityName) && PassFilterVal(this.TaskIDs, ObjectToEvaluate.TaskID) && PassFilterVal(this.ElementIDs, ObjectToEvaluate.EntityID) && PassFilterVal(this.MappingIDs, ObjectToEvaluate.MappingID) && PassFilterVal(this.EntityStatus, ObjectToEvaluate.EntityStatus) && PassFilterVal(this.EntityType, ObjectToEvaluate.EntityType) && PassFilterVal(this.NumberOfSteps, ObjectToEvaluate.ListOfSteps.Count) && PassFilterVal(this.NumberOfDependancies, ObjectToEvaluate.ListOfParentDependancies.Count) && PassFilterVal(this.NumberOfOpenIssues, ObjectToEvaluate.ListOfAllIssues.CountOpen) && PassFilterVal(this.NumberOfRequirementsLinked, ObjectToEvaluate.RequierementsLinked) ; } </code></pre> <p>and my collection has a method </p> <pre><code>ListOfMyClass FilterList(MyClassFilter Filter){ ListOfMyClass FilteredList = new ListOfMyClass(); foreach (MyClass Task in this) { if (Filter.TaskPassFilter(Task)) FilteredList.Add(Task); } return FilteredList; } </code></pre> <p>It works fine as long as the collection is small but when I have 500 objects it start to be really slow. I have searched the net but all the examples are going object by object in the collection and asking filed by field if it pass or not.</p> <p>Any suggestions as how to improve performance?</p> <p>Thanks</p>

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