C# TypeInfo GetConstructor(BindingFlags, Binder, Type[], ParameterModifier[])

Description

TypeInfo GetConstructor(BindingFlags, Binder, Type[], ParameterModifier[]) Searches for a constructor whose parameters match the specified argument types and modifiers, using the specified binding constraints.

Syntax

TypeInfo.GetConstructor(BindingFlags, Binder, Type[], ParameterModifier[]) has the following syntax.


[ComVisibleAttribute(true)]//from  w  w w.  j  a  va  2s.  c  o  m
public ConstructorInfo GetConstructor(
  BindingFlags bindingAttr,
  Binder binder,
  Type[] types,
  ParameterModifier[] modifiers
)

Parameters

TypeInfo.GetConstructor(BindingFlags, Binder, Type[], ParameterModifier[]) has the following parameters.

  • bindingAttr - A bitmask comprised of one or more BindingFlags that specify how the search is conducted.
  • bindingAttr - -or-
  • bindingAttr - Zero, to return null.
  • binder - An object that defines a set of properties and enables binding, which can involve selection of an overloaded method, coercion of argument types, and invocation of a member through reflection.
  • binder - -or-
  • binder - A null reference (Nothing in Visual Basic), to use the DefaultBinder.
  • types - An array of Type objects representing the number, order, and type of the parameters for the constructor to get.
  • types - -or-
  • types - An empty array of the type Type (that is, Type[] types = new Type[0]) to get a constructor that takes no parameters.
  • types - -or-
  • types - EmptyTypes.
  • modifiers - An array of ParameterModifier objects representing the attributes associated with the corresponding element in the parameter type array. The default binder does not process this parameter.

Returns

TypeInfo.GetConstructor(BindingFlags, Binder, Type[], ParameterModifier[]) method returns A ConstructorInfo object representing the constructor that matches the specified requirements, if found; otherwise, null.

Example


using System;//from   w  w w. ja v a2s .c o  m
using System.Reflection;
using System.Security;


public class MyClass1
{
    public MyClass1(int i){}
    public static void Main()
    {
       Type myType = typeof(MyClass1);
       Type[] types = new Type[1];
       types[0] = typeof(int);
       ConstructorInfo constructorInfoObj = myType.GetConstructor(
           BindingFlags.Instance | BindingFlags.Public, null, types, null);
       if (constructorInfoObj != null )
       {
           Console.WriteLine("The constructor of MyClass1 that is public " +
               "and takes an integer as a parameter is:");
           Console.WriteLine(constructorInfoObj.ToString());
       }
    }
}

The code above generates the following result.





















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