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POHow to map results of a stored procedure to an existing table in Entity Framework code-first
 

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  1. POHow to map results of a stored procedure to an existing table in Entity Framework code-first
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    <p>I have an issue while mapping results of a stored procedure (<code>dbo.sp_Get_User</code>) to an existing <code>UserEntity</code> entity.</p> <p>I didn't want to user db table column names in my project directly. So I have <code>UserEntity</code> as follows:</p> <pre><code>public class UserEntity { public UserEntity() { } public int UserKey { get; set; } public string FirstName { get; set; } public string LastName { get; set; } } </code></pre> <p>And my mapper maps all the columns of table to this entity as follows:</p> <pre><code>public class UserEntityMapper : EntityTypeConfiguration&lt;UserEntity&gt; { public UserEntityMapper() { ToTable("tbl_User"); HasKey(m =&gt; m.UserKey); Property(p =&gt; p.UserKey).HasColumnName("User_KEY"); Property(p =&gt; p.FirstName).HasColumnName("FIRST_NAME"); Property(p =&gt; p.LastName).HasColumnName("LAST_NAME"); } } </code></pre> <p>Now I have a condition where I need to use a stored procedure to get the user data (based on some dynamic queries and all, I have to use this stored procedure for sure)</p> <p>So I am trying to execute the stored procedure as follows:</p> <pre><code>SqlParameter temp1 = new SqlParameter("@EffecitveDate", DateTime.Parse("01/01/2012")); SqlParameter temp2 = new SqlParameter("@User_Key", id); IEnumerable&lt;UserEntity&gt; usrEnt = context.Database.SqlQuery&lt;UserEntity&gt;("sp_Get_User @EffecitveDate, @User_Key", temp1, temp2); </code></pre> <p>But I am getting following error while executing the above line:</p> <blockquote> <p>The data reader is incompatible with the specified 'UserEntity'. A member of the type, 'UserKey', does not have a corresponding column in the data reader with the same name.</p> </blockquote> <p>I am really stuck on this please suggest. Thanks</p>
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    1. USuser1882705
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      1. POHow to map results of a stored procedure to an existing table in Entity Framework code-first
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    1. COSide note: you should **not** use the `sp_` prefix for your stored procedures. Microsoft has [reserved that prefix for its own use (see *Naming Stored Procedures*)](http://msdn.microsoft.com/en-us/library/ms190669%28v=sql.105%29.aspx), and you do run the risk of a name clash sometime in the future. [It's also bad for your stored procedure performance](http://www.sqlperformance.com/2012/10/t-sql-queries/sp_prefix). It's best to just simply avoid `sp_` and use something else as a prefix - or no prefix at all
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      1. POHow to map results of a stored procedure to an existing table in Entity Framework code-first
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    2. COThanks! i will keep in mind about that.But do you have any idea how to fix that problem above?
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      1. POHow to map results of a stored procedure to an existing table in Entity Framework code-first
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