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  1. PO
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    <p>This would be much easier if you had a list of article objects, each of which contained properties for <code>fly</code>, <code>img</code>, <code>bar</code>, <code>popularity</code>, etc. But if you really have to store things using this inside-out approach, then the only way you can sort the content items based on popularity is to create another array (or list) to hold the order.</p> <p>Create a new list and populate it with sequential indexes:</p> <pre><code>List&lt;int&gt; OrderedByPopularity = new List&lt;int&gt;(); ArrayList popList = myDicList["popularity"]; for (int i = 0; i &lt; popList.Count; ++i) { OrderedByPopularity.Add(i); } </code></pre> <p>Now you have a list that contains the indexes of the items in the popularity list. Now you can sort:</p> <pre><code>OrderedByPopularity.Sort((i1, i2) =&gt; return popList[i1].CompareTo(popList[i2]);); </code></pre> <p>But that gives you the least popular article first. If you want to reverse the sort so that <code>OrderedByPopularity[0]</code> is the most popular item:</p> <pre><code>OrderedByPopularity.Sort((i1, i2) =&gt; { return popList[i2].CompareTo(popList[i1]);}); </code></pre> <p>Really, though, you should look into restructuring your application. It's much easier to work with objects that have properties rather than trying to maintain parallel arrays of properties.</p> <p>If you have to do this in .NET 2.0, declare the <code>poplist</code> array at class scope (rather than method scope), and create a comparison method.</p> <pre><code>ArrayList poplist; void MyMethod() { List&lt;int&gt; OrderedByPopularity = new List&lt;int&gt;(); popList = myDicList["popularity"]; for (int i = 0; i &lt; popList.Count; ++i) { OrderedByPopularity.Add(i); } OrderedByPopularity.Sort(PopularityComparison); // ... } int PopularityComparison(int i1, int i2) { return ((int)popList[i2]).CompareTo((int)popList[i1]); } </code></pre>
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    1. PORegarding Sorting MultiDimensional Arrays in C#
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    1. USJim Mischel
    1. USJim Mischel
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    1. COAlternatively, you could create a collection of popularity-to-index mapping, order the new collection based on popularity, then read by order of index in the collection.
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      1. USJon
    2. COThanks Jim, this looks like an elegant solution. Unfortunately I stupidly forgot to mention that I am limited by .NET 2.0 - would this be possible without the use of predicates?
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      1. USPeter
    3. COIt looks like the only thing I can't do in .NET 2.0 is the .CompareTo method...
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      1. USPeter
 

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