How to Correctly Use DbContext.Database.SqlQuery with Stored Procedure Parameters in EF Code First?

Using DbContext.Database.SqlQuery<TElement>(sql, params) with Stored Procedures in EF Code First

Executing stored procedures with parameters using DbContext.Database.SqlQuery<TElement>(sql, params) can present difficulties.

Problem:

This approach, when used with stored procedures needing parameters, often results in an error message like:

<code>"Procedure or function 'mySpName' expects parameter '@param1', which was not supplied."</code>

Resolution:

The solution involves supplying SqlParameter objects in the correct structure:

<code class="language-csharp">context.Database.SqlQuery<MyEntityType>(
    "mySpName @param1, @param2, @param3",
    new SqlParameter("param1", param1),
    new SqlParameter("param2", param2),
    new SqlParameter("param3", param3)
);</code>

Providing SqlParameter instances ensures the stored procedure receives the necessary parameters, leading to successful execution and data retrieval.

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