How to test for system data types

[ispeaker]

I am looping through all the properties of a class. Most are of a system data type (i.e. system.double, system.integer, etc.). Some are actually other classes. How can I tell at run time if the current property is a system data type or class or a collection?

 

[jbenson001]

Try this:

Dim obj As New <someclass>
        ''show all properties and their value in a class
        Dim prop As System.Reflection.PropertyInfo
        For Each prop In obj.GetType.GetProperties
            Response.Write(prop.Name + "<br>")
            Response.Write(prop.GetValue(obj, Nothing) + "<br>")
            Response.Write(prop.MemberType.ToString + "<BR>")

        Next prop

 

[ispeaker]

That got me one step close.
Debug.WriteLine(prop.MemberType.ToString()) always returns "Property." What I need to know is if the data type of the property is a system type (system.integer, system.double, etc.) or is it a class or collection.

 

[jbenson001]

It worked for me when I tested it.... there must be something in your class that is throwing it off. Use the response.write.. maybe the debug.writeline statment is causeing problems?

 

[ispeaker]

Yes, I got it to work using prop.PropertyType.ToString.
To make sure I read only properties with printable values, I used, If NOT prop.PropertyType.isClass then . . .

 

[jbenson001]

Hey.. glad you got it working. I didn't even see the propertyType. Glad you posted it. Thanks. I learned something new today..

Jim