Databases
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    <p>Here is some code to help you to work out Left Join with Link</p> <pre><code> private class EntityRole { public int EntityId { get; set; } public int RoleId { get; set; } } private IList&lt;EntityRole&gt; GetSourceEntityRole() { var list = new List&lt;EntityRole&gt;() {new EntityRole(){EntityId = 123, RoleId = 1}, new EntityRole(){EntityId = 123, RoleId = 2}, new EntityRole(){EntityId = 123, RoleId = 3}, new EntityRole(){EntityId = 123, RoleId = 4}}; list.Reverse(); return list; } private IList&lt;EntityRole&gt; GetEmptyEntityRole() { var list = new List&lt;EntityRole&gt;(); return list; } public void TestToDelete() { var source = this.GetSourceEntityRole(); var destination = this.GetEmptyEntityRole(); this.TestLeftJoin(source, destination); } private void TestLeftJoin(IList&lt;EntityRole&gt; source, IList&lt;EntityRole&gt; destination) { var inserting = this.GetMissing(source, destination); var deleting = this.GetMissing(destination, source); this.Enumerate("Source", source); this.Enumerate("Destination", destination); this.Enumerate("Deleting", deleting); this.Enumerate("Inserting", inserting); } private IEnumerable&lt;EntityRole&gt; GetMissing(IList&lt;EntityRole&gt; sourceEntities, IList&lt;EntityRole&gt; destinationEntities) { return from source in sourceEntities join dest in destinationEntities on source.RoleId equals dest.RoleId into joined from source2 in joined.DefaultIfEmpty() where source2 == null select source; } private void Enumerate(string source, IEnumerable&lt;EntityRole&gt; roles) { foreach (var item in roles) { Console.WriteLine("{0}:{1}", source, item.RoleId); } } </code></pre>
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    1. POLinq-to-Entities Left JOIN
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    1. USdavidwatercamp
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      1. VTUpMod
    1. CODefaultIfEmpty() is not supported by Entity framework in Net 3.5
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      1. USshivesh
    2. COI'd like to see code that helps out left joining with Zelda ;)
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      1. USMathieu Guindon
 

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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.

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