Adding element to List through reflection

Question

I try to add an element to a List I retrieved through reflection.

The following line

property.PropertyType.GetMethod("Add").Invoke(entity, new[] { innerValue });

is throwing an error

Object does not match target type" (Reflection.TargetException)

But the Types should match:

string listType=property.PropertyType().FullName; // System.Collections.Generic.List`1[[My.Entities.Task, My.Entities, Version=1.4.6429.20475, Culture=neutral, PublicKeyToken=null]]
string elementType=innerValue.GetType().FullName; // My.Entities.Task

entity is an object that contains the property above

What is wrong here?

René Vogt · Accepted Answer · 2017-08-08 13:52:14Z

7

You try to invoke Add on entitiy, not on the list contained in entity's property.

Get the value of the property (which should be the list) and invoke Add on that reference:

var list = property.GetValue(entity);
property.PropertyType.GetMethod("Add").Invoke(list, new[] { innerValue });

answered Aug 8, 2017 at 13:52

René Vogt

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