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POIterating over all properties in a given type in .NET
 

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  1. POIterating over all properties in a given type in .NET
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    <p>If I have a complex structure which contains properties which are both simple and complex types, how can I iterate over all the properties of this structure and any child properties which are not simple types?</p> <p>I have a complex type called file, which contains lots of string properties and some which are other complex types which contain similar structures, eventually the whole structure breaks down into strings.</p> <p>At the moment my code looks like this:</p> <pre><code>Dim file As New File Dim props() As PropertyInfo = file.GetType.GetProperties() _propList = New CheckBoxList For Each prop As PropertyInfo In props _propList.Items.Add(prop.Name) Next </code></pre> <p>This code loads my checkboxlist with all the names of the child properties of my file type. What I really want is a list containing all the names of properties which are of type string from all the complex types which make up the file.</p> <p>I am very new to reflection, so I am not sure how to approach this.</p> <h3>Update</h3> <p>Thank you for the advice so far. I have created a recursive function using Visual Basic code similar to the C# code supplied. The code now looks like this:</p> <pre><code>Private Function GetStringPropertyNames(ByVal Type As System.Type) As List(Of String) Dim props() As PropertyInfo = Type.GetProperties Dim propList As New List(Of String) For Each prop As PropertyInfo In props If prop.Name &lt;&gt; "Chronology" And _ prop.Name &lt;&gt; "Documents" And _ prop.Name &lt;&gt; "Milestones" And _ prop.Name &lt;&gt; "DiaryEntries" And _ prop.Name &lt;&gt; "FileLoadSuccesful" And _ prop.Name &lt;&gt; "FileLoadError" Then Dim boo As Boolean = False Dim bootype As Type = boo.GetType Dim dec As Decimal Dim decType As Type = dec.GetType If prop.PropertyType Is "".GetType Or _ prop.PropertyType Is Now.GetType Or _ prop.PropertyType Is bootype Or _ prop.PropertyType Is decType Then propList.Add(prop.Name) Else Dim listChildPropertyStrings As List(Of String) = GetStringPropertyNames(prop.PropertyType) For Each strProp As String In listChildPropertyStrings propList.Add(prop.Name &amp; ": " &amp; strProp) Next End If End If Next Return propList End Function </code></pre> <p>This works, but it is ugly, and I am not at all happy with certain chunks, specifically the type comparisons to establish if this is a date, string, decimal or boolean which are the potential low-level types which I want to get out.</p> <p>In C# it would seem these type comparisons are easier, but I seem to have to create an instance of a given type to be able to use GetType to return its type.</p> <p>Are there other ways that this code could be cleaned up?</p>
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