Databases
StackOverflow2013
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PO
 

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    <p>Use an anonymous method to wrap the call.</p> <p>For example, assuming you have a datalayer class, add a similar method to the data layer:</p> <pre><code>public delegate void DoSomethingInvoker(); class DataLayer { //myReader needs to be declared externally in other to access it from the doSomething delegate public void MethodThatGetsAsXmlReader(XmlReader myReader, DoSomethingInvoker doSomething) { myReader = GetXmlReaderFromDB(); doSomething(); CloseDbConnection(); //close connections, do cleanup, and any other book keeping can be done after the doSomething() call } } </code></pre> <p>To call/use it, you simply do this in your high level class</p> <pre><code>DataLayer dl = new DataLayer(); XmlReader myReader = null; //variables declared outside the scope of the anonymous method are still accessible inside it through the magic of closures dl.MethodThatGetsAsXmlReader(myReader, delegate() { //do all work that involves myReader here myReader.read(); Console.out.println(myReader.value); }); //at this point myReader is closed and cannot be used </code></pre> <p>Basically, you pass the code you want to execute to the datalayer, the data layer fetches the xmlreader, calls your code against it, and then does cleanup.</p> <p>I use a similar technique for wrapping transaction logic in my code</p> <pre><code>DataLayer dl = new DataLayer(); dl.Transaction(delegate() { dl.DbCall1(); dl.DbCall2(); dl.DbCall3(); }); </code></pre> <p>It makes the code nice and readable, while still keeping it organized and layered;</p>
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      1. VTUpMod
    1. COcool! thanks you.
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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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