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Object-Oriented database design with the DatabaseObjects library

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31 Jan 20076 min read 109.4K   3.9K   64  
Demonstrates creating object-oriented database systems with the DatabaseObjects library.
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<title>Database Objects</title>
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<h1><!-- InstanceBeginEditable name="heading" -->DatabaseObjects<!-- InstanceEndEditable --></h1>
<h3><!-- InstanceBeginEditable name="subheader" --> Object(<span class="keyword">ByVal</span> objCollection
    <span class="keyword">As</span> IDatabaseObjects, 
  <span class="keyword">ByVal</span> vDistinctValue <span class="keyword">As
  Variant</span>) <span class="keyword">As</span> IDatabaseObject<!-- InstanceEndEditable --><br>
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<p>Object returns an instance of an object from a collection using a distinct
  value as specified by IDatabaseObjects_DistinctFieldName. If the collection
  has implemented the <a href="IDatabaseObjects_Subset.htm">IDatabaseObjects_Subset</a> function
  then the vDistinctValue need only be unique within the subset,
  not the entire database table. The vDistinctValue is the distinct value as
  defined by the collection's <a href="IDatabaseObjects_DistinctFieldName.htm">IDatabaseObjects_DistinctFieldName</a> function.</p>
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</span><span class="keyword">Dim</span> objProduct <span class="keyword">As</span> Product

<span class="comment">'Return a product instance with an <font face="Courier New, Courier, mono">ID</font> number of 1234</span>
<span class="keyword"><font face="Courier New, Courier, mono">Set</font></span><font face="Courier New, Courier, mono"> objProduct = DBO.Object(objGlobalProductsInstance<span class="keyword"></span>, 1234)</font>

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<p>&nbsp;</p>
<p align="center"><font size="1">�  Hi Integrity Systems 2005. All rights reserved.</font></p>
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