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PORemove Data From a Hierarchy
 

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    <p>Afternoon, I am trying to do something in Silverlight with the EntityFramework and have hit a wall.</p> <p>I am pulling some hierarchical data out of the database and displaying it in a tree view, what I want to do is remove any nodes which do not have a child node and there are no items associated with it (Easy...) but what I am finding is that there are nodes left over, so from the original tree:</p> <pre> Parent 1 -----Node 1 Parent 2 Parent 3 -----Node 2 ---------- Some Items -----Node 3 ---------- Some More Items </pre> <p><p>What I am finding is that Parent 2 is removed (Because it has no children ro items) and Node 1 is removed because it has no children or items... But Parent 1 is left because it HAD child nodes, but these were removed... </p> <p>I dont really want to loop over the reeview as that would be inneficient what I have done is constrain the data that is being bound to the view:</p> <p>Data Structure:</p> <p>HIERARCHY<br /> ~~~~~~~~~~<br /> HierarchyID<br /> Description<br /> ParentID (FK - HierarchyID)<br /></p> <p>Items<br /> ~~~~~<br /> ItemID<br /> Description<br /> Price<br /> HierarchyID (FK - Hierarchy.HierarchyID)<br /></p> <p>I am using something along these lines to constrain the data:</p> <p>var data = from Hierarchy.where(x=>x.Hierarchies.Count > 1 &amp;&amp; x=>x.Items.Count > 0) </p> <p>then data is bound to the treeview.</p> <p>This isnt exactly what we have, some of this is from memory, but it outlines the problem that we are having at the moment, if anyone has any ideas it would be greatly apprectiated</p>
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    1. COCould you not switch your code around to iterate through Items (the child nodes) and gather the related Node and Heirarchy from them instead?
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    2. COThats the problem, trying to avoid iterating over it... its a big structure. However if you could suggest a way to do this (backwards starting with child elements) it would be apprectiated.
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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.

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