My goal is to create an instance of a class from it's AssemblyQualifiedName. The problem is that this class requires an interface to be passed in it's constructor and I am having trouble doing this with Activator.CreateInstance.
Thanks in advance for the help.
Once i have the AssemblyQualifiedName of the class I want to instantiate I got it's type using Type.GetType(AQN), used that type to find the constructor and get the required parameters.
I get stuck when calling Activator.CreateInstance and passing the parameters.
var objectType = Type.GetType(AQN);
var constructors = objectType.GetConstructors();
foreach (ConstructorInfo constructor in constructors)
{
var parameters = constructor.GetParameters();
var instantiatedObj = Activator.CreateInstance(objectType,parameters);
}
Once I do this i get the error "Constructor on Type xxx not found."
There's a Activator.CreateInstance that simply takes the type and the parameters to pass. So you can just say:
ISomeInterface something = null;
var objectType = Type.GetType(AQN);
var instance = Activator.CreateInstance(objectType, something);
if you want to create an instance of the class dynamically then you can do it like this too
Type type = Type.GetType(AQN);
PropertyInfo[] properties = type.GetProperties();
var instance = (BaseClass)Activator.CreateInstance(type);
for (int i = 0; i < properties.Length; i++)
{
PropertyInfo propertyInfo = type.GetProperty(properties[i].Name);
var propertyVal = Convert.ChangeType(yourpropertyvalue,
properties[i].PropertyType);
propertyInfo.SetValue(instance, propertyVal);
}
return instance;
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