How can I Create an object and execute a method using reflection?

Question

I have this class:

public class StructTest
{

    public StructTest()
    {

    }

    public void Start()
    {
        // do something
    }

}

I want to dynamically create an instance of the class StructTest and execute its method "Start" using reflection. But the following code is throwing an Exception:

Assembly current = Assembly.GetExecutingAssembly();
        string nomeClasse = "StructTest";

        foreach (var classInAssembly in current.GetTypes().Where(p => p.IsClass).Where(p => p.Name.Equals(nomeClasse)))
        {
            Type type = classInAssembly.GetType();
            var classe = Activator.CreateInstance(type, null); // Here the VS says theres no paramterless contructor for this class without parameters

            IEnumerable<MethodInfo> methodList = classInAssembly.GetMethods().Where(p => p.Name.Equals("Start"));
            MethodInfo method = methodList.First();

            method.Invoke(classe, null);
        }

King King · Accepted Answer · 2013-09-02 00:51:24Z

2

foreach (var type in current.GetTypes().Where(p => p.IsValueType && p.Name.Equals(nomeClasse))) {
        var classe = Activator.CreateInstance(type);
        MethodInfo method = type.GetMethod("Start");
        method.Invoke(classe, null);
}

edited Sep 2, 2013 at 0:51

answered Sep 2, 2013 at 0:42

King King

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3 Comments

Marcel James Over a year ago

I Did it now, and it keeps throwing "No parameterless constructor defined for this object."

King King Over a year ago

@WilnerAvila be sure that you have a parameterless constructor defined in your struct like the code you posted.

King King Over a year ago

@WilnerAvila your code has something wrong (fairly much), see my code if it works now.

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