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POWhy does Entity Framework throw an exception when changing SqlParameter order?
 

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  1. POWhy does Entity Framework throw an exception when changing SqlParameter order?
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    <p>Im using entity framework 4.3 code first for calling stored procedure the way i call the stored procedure is like this:</p> <pre><code>var parameters = new[] { new SqlParameter("member", 1), **new SqlParameter("Code","0165210662660001"),** new SqlParameter("PageSize", 1), new SqlParameter("PageNumber",1) }; var result = context.Database.SqlQuery&lt;resultClass&gt;( "mySpName @member, @Code, @PageSize,@PageNumber" parameters).ToList(); </code></pre> <p>It gets executed on the SqlServer and I get the result.</p> <p>But if I change the order of the paramaters like this:</p> <pre><code>var result = context.Database.SqlQuery&lt;resultClass&gt;("mySpName @Code, @member,@PageSize,@PageNumber" parameters).ToList(); var parameters = new[] { **new SqlParameter("Code","0165210662660001"),** new SqlParameter("Member", 1), new SqlParameter("PageSize", 1), new SqlParameter("PageNumber",1) }; </code></pre> <p>I got an error like this :</p> <pre><code> Error converting data type nvarchar to int </code></pre> <p>The stored procedure is like this : </p> <pre><code>ALTER PROCEDURE [c].[mySpName] @Member INT , @Code VARCHAR (50) , @PageSize INT , @PageNumber INT AS </code></pre> <p>Why do i get this order? Is it important to keep parameters order? What can i do so that I can call a stored procedure without being concerned about parameters order?</p> <p><strong>============ i find a workaround and it works perfectly ============</strong></p> <pre><code>public class blahContext&lt;T&gt; { int i = 0; public IEnumerable&lt;T&gt; ExecuteStoreQuery(string SPname, SqlParameter[] parameters) { using (var context = new CADAContext()) { string para = string.Join(", ", (from p in parameters where !"NULL".Equals(p.Value) select string.Concat(new object[] { "@", p.ParameterName, "={", this.i++, "}" })).ToList&lt;string&gt;()); object[] x = (from p in parameters where !"NULL".Equals(p.Value) select p.Value).ToArray&lt;object&gt;(); return context.Database.SqlQuery&lt;T&gt;(SPname + " " + para, x).ToList(); } } </code></pre>
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    1. US1AmirJalali
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      1. POWhy does Entity Framework throw an exception when changing SqlParameter order?
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    1. COIt's because you changed the order of parameters when invoking the SP - see my answer below for clarification.
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      1. USQuinton Bernhardt
 

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