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POLosing "Order by" after additional .RemoveAll() with LINQ to ENTITIES (3.5)?
 

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  1. POLosing "Order by" after additional .RemoveAll() with LINQ to ENTITIES (3.5)?
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    <p>I seem to be needing to "re-order" my result set after i make some modifications to it, is this "a feature" if so, some enlightenment? am I missing something? </p> <pre><code>//need the "IN" type functionality to limit my initial set. var resultSet = from t in someContext.SomeEntities .Where("it.some_id IN{" + string.Join(",", array) + "}") where t.obj_id == objtId orderby t.tInt select new customObj { prop1= t.t1, prop2 = t.tInt, prop3 = t.tInt2 }; //Do some other lookups / decision branching and //determine that i need to remove the following: //just for arguments sake resultSet.ToList().RemoveAll(o =&gt; o.prop1== 8 &amp;&amp; o.prop1 == 5 &amp;&amp; o.prop1 == 11 &amp;&amp; o.prop1 == 21); foreach (var vals in resultSet) { //do something that depends on the order } </code></pre> <p>after that sequence.. something that i expected to be in order, is not.. when i do another orderby on the result set like:</p> <pre><code>foreach (var vals in resultSet.OrderBy(o =&gt; o.tInt)) { //now the order's okay } </code></pre> <p>then it's what i would've originally expected.. </p> <p>so should i not do any ordering until i have filtered my result set down? In this case obviously i could've done some filtering on the initial query, but in my situation, i really cant.. </p> <p>..thanks in advance. </p> <p>UPDATE:</p> <p>I must be doing a .ToList() on it for the (.RemoveAll()), is that the culprit then?</p> <p><a href="http://msdn.microsoft.com/en-us/library/wdka673a%28v=vs.90%29.aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/wdka673a%28v=vs.90%29.aspx</a> </p>
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    1. UShanzolo
    1. UShanzolo
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      1. VTUpMod
    1. COThere is no `RemoveAll()` method on `IEnumerable<T>` or `IQueryable<T>`. Where exactly is it coming from? What is the type it is declared in?
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      1. USsvick
    2. COWhy do you remove those items instead of excluding them from the query directly by another where condition?
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      1. USLadislav Mrnka
    3. CO@Ladislav - please look at this example as a hypothetical representation. And assume there is a "good" reason for it..
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      1. UShanzolo
 

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