Because you can define a property as being optional, you may want to validate the property in your template to determine whether or not the user has entered a value. For example, you might want to allow generating a class either with a namespace declaration or without, at the user's option. To do this, you would first define an appropriate optional property:
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<%@
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Property
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Name="ClassNamespace"
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Type="System.String"
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Optional="True"
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Category="Context"
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Description="The
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namespace
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that
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the
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generated
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class
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will
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be
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a
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member
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of."
...
%>
...
In your template, you can check to see whether there's a value in this property at runtime. If so, you want to output the appropriate namespace declaration. If you're using C# as your template language, you'd do that like this:
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Wiki Markup <% if (ClassNamespace != null && ClassNamespace.Length > 0) { %>
namespace <%= ClassNamespace %>
{
<% } %>
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If your template is using VB, the equivalent code is:
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<%
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If
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Not
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ClassNamespace
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Is
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Nothing
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AndAlso
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ClassNamespace.Length
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>
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0
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Then
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%>
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Namespace
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<%=
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ClassNamespace
...
%>
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<%
...
End
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If
...
%>
...