Databases
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    <p>Sorry for the delay, I was on holydays. :)</p> <p>The problem is that a DataBoundControl such as ListView has a SortExpression property, but not a FilterExpression. It is fine to implement a sortable grid/list with a ListView by means of a IButtonControl WebControl that fires a PostBack and a Command event. Then you use the SortExpression or the Sort method and pass a sort expression that will fill the DataSourceSelectArguments.SortExpression and pass it to the DataSource which can construct the apropiate SQL statement (in my case) to retrieve the Data from the DB. This allows for separation between the Data and the WebControl that displays it, IMHO.</p> <p>Following this pattern I was about to implement a filter by filling an extra parameter object in my DataSourceSelectArguments with the requested filter and I will have called Sort, which would have passed this arguments object to the DataSource, where I would have constructed the appropiate select clause.</p> <p>I've finally solve it by "coding" the filter information in the SortExpression, but I find it ugly (for the name, in the first place: sort != filter), and I was wondering if there's a more appropiate way of doing this or if I'm missing something that is more subtle.</p> <p><strong>Edit</strong>:</p> <p>Maybe a better approach would be to override <code>ListView</code>'s <code>PerformSelect</code> method and ask my own implementation of the <code>DataSourceView</code> if it can filter, then call a special <code>ExecuteSelect</code> method that accepts a special <code>DataSourceSelectArguments</code> with a filter object. Taking care not to do anything that will break when someone use the custom <code>ListView</code> with a non-enhanced <code>DataSourceView</code>, of course.</p>
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Guidance
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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