title: Show subreport multiple times based on multi-value parameter
body: <p>I have a report that shows aggrevated sales figures for one or more shops.
  The shops can be selected through a multi-value parameter (shopID) that is used to filter a  shared dataset. The parameter shopid is filled by the shared dataset shops</p>
  
  <p>This report contains a subreport that shows details per shop. The subreport has a single-value parameter (shopID) that is used to filter a shared dataset in the subreport.</p>
  
  <p>now, when I link the subreport like this:</p>
  
  <pre><code>Parameters Tab on Properties page of the subreport:
  Name = shopID  Value = Fields!shopid.Value
  </code></pre>
  
  <p>the subreport is shown <em>for each shopid in the dataset shops</em>. But I want the subreport to be shown for <em>each shopID in the parameter shopID</em>. I thought it would suffice to use the parameter for the value, like this: </p>
  
  <pre><code>Parameters Tab on Properties page of the subreport:
  Name = shopID  Value = Parameters!LaagID.Value
  </code></pre>
  
  <p>But then I only get the first shop in the parameter returned. I get the subreport showing  the first shop as many times as there are shops.....If I use </p>
  
  <pre><code>Parameters Tab on Properties page of the subreport:
  Name = shopID  Value = Parameters!LaagID.Value(1)
  </code></pre>
  
  <p>I get to see (surprise, surprise) the second shop as many times as there are shops.....</p>
  
  <p>I have tried splits, joins, all kind of things but for the life of me I can not find out how to show the subreport once for each shop in the parameter shopid.</p>
  
  <p>Suggestions? Pretty pretty please?</p>