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2013-02-07T09:23:19.213
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So, while it may not be a true abstraction any longer, the main point was to get the benefit of linq to sql without updating all the queries already written. so, I made the IRepository implement IQueryable instead of IEnumerable. then in the SqlClientRepository implementation, I can call AsQueryable() to cast the Table to IQueryable, and then all is good, like so. Now everywhere somebody has written IRepository().Where(qi => qi.id = id) or similar, it actually passes the ID to sql server and only pulls back one record, instead of all of them, and loops through looking for the correct one. <pre><code>/// <summary>Provides the ability to query and access entities within a SQL Server data store.</summary> /// <typeparam name="T">The type of entity in the repository.</typeparam> public sealed class SqlClientRepository<T> : IRepository<T> where T : class { private readonly Table<T> _source; private readonly IQueryable<T> _sourceQuery; IQueryable<T> Query() { return (IQueryable<T>)_source; } public Type ElementType { get { return _sourceQuery.GetType(); } } public Expression Expression { get { return _sourceQuery.Expression; } } public IQueryProvider Provider { get { return _sourceQuery.Provider; } } /// <summary>Initializes a new instance of the <see cref="SqlClientRepository{T}"/> class.</summary> /// <param name="source">A <see cref="Table{T}"/> to a collection representing the entities from a SQL Server data store.</param> /// <exception cref="ArgumentNullException"><paramref name="source"/> is a <c>null</c> reference (<c>Nothing</c> in Visual Basic).</exception> internal SqlClientRepository(Table<T> source) { if( source == null ) throw new ArgumentNullException( "source", "All_TableIsNull" ) ); _source = source; _sourceQuery = _source.AsQueryable(); } </code></pre>
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Querying!

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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.