NGWS SDK Documentation  

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Type.GetConstructor (BindingFlags, Binder, Type[], ParameterModifier[])

Searches for a constructor whose parameters match the specified argument types and modifiers, using the specified binding constraints.

[Visual Basic]
Overloads Public Function GetConstructor( _
   ByVal bindingAttr As BindingFlags, _
   ByVal binder As Binder, _
   ByVal types() As Type, _
   ByVal modifiers() As ParameterModifier _
) As ConstructorInfo
[C#]
public ConstructorInfo GetConstructor(
   BindingFlags bindingAttr,
   Binder binder,
   Type[] types,
   ParameterModifier[] modifiers
);
[C++]
public: ConstructorInfo* GetConstructor(
   BindingFlags bindingAttr,
   Binder* binder,
   Type* types[],
   ParameterModifier* modifiers[]
);
[JScript]
public function GetConstructor(
   bindingAttr : BindingFlags,
   binder : Binder,
   types : Type[],
   modifiers : ParameterModifier[]
) : ConstructorInfo;

Parameters

bindingAttr
A bit mask comprised of one or more BindingFlags that specify how the search is conducted.

-or-

zero, to conduct a case-sensitive search for public methods.

binder
A Binder object that defines a set of properties and enables binding, which may involve selection of an overloaded method, coercion of argument types, and invocation of a member through reflection.

-or-

a null reference (in Visual Basic Nothing), to use the DefaultBinder.

types
An array of Type objects representing the number, order, and type of the parameters for the constructor to get.

-or-

An empty array of the type Type (that is, Type[] types = new Type[0]) to get a constructor that takes no parameters.

modifiers
An array of ParameterModifier objects representing the attributes associated with the corresponding element in the types array.

Return Value

A ConstructorInfo object representing the constructor that matches the specified requirements, if found; otherwise, a null reference (Nothing).

Exceptions

Exception Type Condition
ArgumentNullException types is a null reference (Nothing).

-or-

One of the elements in types is a null reference (Nothing).

ArgumentException types is multidimensional.

-or-

modifiers is multidimensional.

-or-

types and modifiers do not have the same length.

(?)

SecurityException The requested constructor is non-public and the caller does not have ReflectionPermission to reflect non-public constructors outside the current assembly.

Remarks

The types array and the modifiers array have the same length. A parameter specified in the types array can have the following attributes, which are specified in the modifiers array: pdIn, pdOut, pdLcid, pdRetval, pdOptional, and pdHasDefault, which represent [in], [out], [lcid], [retval], [optional], and a value specifying whether the parameter has a default value. A parameter's associated attributes are stored in the metadata and are used for interoperability.

If an exact match does not exist, the binder will attempt to coerce the parameter types specified in the types array in order to select a match. If the binder is unable to select a match, then a null reference (Nothing) is returned.

The following BindingFlags filter flags can be used to define which constructors should be included in the search:

See BindingFlags for more information. GetConstructor cannot be used to obtain a class initializer. Class initializers are available only through GetMember, GetMembers, FindMembers, and GetConstructors.

See Also

Type Class | Type Members | System Namespace | Type.GetConstructor Overload List | DefaultBinder