Getting the MethodInfo of static method of a static class

Question

I'm trying to get the MethodInfo of a static method in a static class. When running the following line, I only get the basic 4 methods, ToString, Equals, GetHashCode and GetType:

MethodInfo[] methodInfos = typeof(Program).GetMethods();

How can I get the other methods that are implemented in this class?

Answer 1

var methods = typeof(Program).GetMethods(BindingFlags.Static | BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);

Answer 2

试试这种方式：

MethodInfo[] methodInfos = typeof(Program).GetMethods(BindingFlags.Static | BindingFlags.Public);

Answer 3

Also if you know your static method and have access to it at a compile time, you could use Expression class to get MethodInfo without directly using reflection (which may cause additional runtime errors):

public static void Main()
{
    MethodInfo staticMethodInfo = GetMethodInfo( () => SampleStaticMethod(0, null) );

    Console.WriteLine(staticMethodInfo.ToString());
}

//Method that is used to get MethodInfo from an expression with a static method call
public static MethodInfo GetMethodInfo(Expression<Action> expression)
{
    var member = expression.Body as MethodCallExpression;

    if (member != null)
        return member.Method;

    throw new ArgumentException("Expression is not a method", "expression");
}

public static string SampleStaticMethod(int a, string b)
{
    return a.ToString() + b.ToLower();
}

Here actual parameters passed to a SampleStaticMethod does not matter as only body of SampleStaticMethod is used, so you could pass null and default values to it.