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POImplementing Drill-Thru Gridview Functionality 100 Different Times With 1 Page
 

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    <p><strong>The requirement:</strong> There are 100 objects that each have a gridview on a webpage. Each object has one element that is an aggregate of another object (i.e. Order has many Items; i.e. Customer has many Orders). The user needs to be able to click on the "Items" cell in the "Order" gridview and have a pop up of a gridview that lists all the "Items". </p> <p><strong>The Problem:</strong> This is easy to do statically for 1 gridview: send the filter values needed to a prebuilt "Items" gridview on a prebuilt "Items" page and then populate. This is what all the existing examples online show. But how would you build this system for <strong>100</strong> gridviews using <strong>1</strong> page? </p> <p><strong>The purposed solution:</strong></p> <p>Each object's gridview has a column that is a hyperlinkfield which belongs to the aggregate object (i.e. "Orders" gridview has a hyperlinkfield called "Items"). On the "DataNavigateUrlFormatString" value of this hyperlinkfield there is the URL address to a single generic page that houses a generic gridview. The "DataNavigateUrlFormatString" value also contains a list of query string parameters. These parameters use a standard naming convention that the receiving generic page can parse. These parameters contain the object's name, along with a list of those object element names and paired values which are required for the query. </p> <p>For instance if the user was looking at Orders and clicked the "Items" gridview cell, the hyperlink would then open a pop up with this URL:</p> <pre><code>"~GenericPage.aspx?ObjectName=Items&amp;paramName1=OrderID&amp;paramName2=IsActive&amp;paramValue1=135&amp;paramValue2=true" </code></pre> <p>This would then get parsed in the GenericPage.aspx Page_Load event by looking for the objectName, and the existance of any number of any "paramName" and "paramValue" parameters. The page would then use these values to construct a query against the BLL for all "Items" that have an OrderID of 135 and IsActive value equal to true. The results would then get bound to the gridview.</p> <p><strong>The Better Design?</strong></p>
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