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POCast a property to its actual type dynamically using reflection
 

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    <p>I need to cast a property to its actual type dynamically. How do I/Can I do this using reflection?</p> <p>To explain the real scenario that I am working on a bit. I am trying to call the "First" extension method on an Entity Framework property. The specific property to be called on the Framework context object is passed as a string to the method (as well as the id of the record to be retrieved). So I need the actual type of the object in order to call the First method. </p> <p>I can't use the "Where" method on the object as the lambda or delegate method still needs the actual type of the object in order to access the properties.</p> <p>Also as the object is generated by the Entity Framework I can't cast the type to an interface and operate on that.</p> <p>This is scenario code:</p> <pre><code>using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Reflection; namespace NmSpc { public class ClassA { public int IntProperty { get; set; } } public class ClassB { public ClassA MyProperty { get; set; } } public class ClassC { static void Main(string[] args) { ClassB tester = new ClassB(); PropertyInfo propInfo = typeof(ClassB).GetProperty("MyProperty"); //get a type unsafe reference to ClassB`s property Object property = propInfo.GetValue(tester, null); //get the type safe reference to the property ClassA typeSafeProperty = property as ClassA; //I need to cast the property to its actual type dynamically. How do I/Can I do this using reflection? //I will not know that "property" is of ClassA apart from at runtime } } } </code></pre>
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    1. USKeith K
    1. USKeith K
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    1. COHow would you cast it to a type you don't know? You know it at runtime. So you can only handle it as an object.
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      1. USStefan Steinegger
    2. COCould you explain a little more your scenario? Suppose there was a way to do it dynamically (actually there isn't but...) what would you do next with this variable? You cannot call .IntProperty because you don't know its type, so back to the beginning there's no need to cast it to ClassA. You just continue with reflection to get IntProperty and so on...
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      1. USDarin Dimitrov
    3. COCan you clarify your question. Because I couldn't understand it properly.
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      1. USPaulo Santos
 

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