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POLocal sequence cannot be used in LINQ to SQL implementation
 

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  1. POLocal sequence cannot be used in LINQ to SQL implementation
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    <p>I'm getting an error, see below, when I try to generate a list of the class MappedItem. In short the code example below tries to find products by category, date range and SKU. The requirement I have is that the user should be able to enter a comma separated list of SKUs and the search is to find any product whos SKU starts with one of the SKUs entered by the user. When I run the code, I get.</p> <p>Local sequence cannot be used in LINQ to SQL implementation of query operators except the Contains() operator.</p> <p>The abbreviated sequence is this: </p> <p>Convert the comma separated string of SKUs into a list of strings.</p> <pre><code>string sku = TextSKU.Text; List&lt;string&gt; skuList = sku.Split(new char[] { ',' }).ToList(); </code></pre> <p>Define elsewhere in the code the class that will accept the search results.</p> <pre><code>public class MappedItem { public string ItemDescription { get; set; } public int ItemCount { get; set; } public MappedItem() { } public MappedItem(string itemDescription, int itemCount) { ItemDescription = itemDescription; ItemCount = itemCount; } } </code></pre> <p>Here's the query that I generate my results from </p> <pre><code>List&lt;MappedItem&gt; widgetItems = (from c1 in db.CCRCodes join pac in db.widgetAssignedCodes on c1.code_id equals pac.code_id join ph in db.widgetHistories on pac.history_id equals ph.history_id where ph.contact_dt.Value.Date &gt;= startDate &amp;&amp; ph.contact_dt.Value.Date &lt;= endDate &amp;&amp; (string.IsNullOrEmpty(baanCatFam) || ph.baan_cat_family_code == baanCatFam) &amp;&amp; (string.IsNullOrEmpty(baanCat) || ph.baan_cat_code == baanCat) &amp;&amp; (string.IsNullOrEmpty(baanSubCat) || (ph.baan_sub_cat_code == baanSubCat)) &amp;&amp; (string.IsNullOrEmpty(sku) || skuList.All(sl =&gt; ph.product_mod.StartsWith(sl))) group c1 by c1.code_desc into ct select new MappedItem { ItemDescription = ct.Key.ToUpper(), ItemCount = ct.Count() }).OrderByDescending(m =&gt; m.ItemCount) .ToList(); </code></pre> <p>I believe that the culprit is the line of code that I've extracted and displayed below.</p> <pre><code>skuList.All(sl =&gt; ph.product_mod.StartsWith(sl)) </code></pre> <p>This identifies all skus that start with an element from the skuList which is derived from a comma delimited lists of skus entered by the user. My question is, what causes this error, and given the code examples, what do I do to get around them.</p>
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    1. This table or related slice is empty.
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    1. USAndy Evans
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      1. POLocal sequence cannot be used in LINQ to SQL implementation
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      1. POLocal sequence cannot be used in LINQ to SQL implementation
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      1. POLocal sequence cannot be used in LINQ to SQL implementation
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