Home Library Learn Downloads Support Community
Sign in | United States - English | |
This topic has not yet been rated - Rate this topic

MethodBase.GetParameters Method

.NET Framework 4

When overridden in a derived class, gets the parameters of the specified method or constructor.

Namespace:  System.Reflection
Assembly:  mscorlib (in mscorlib.dll)
C#
C++
F#
VB
Copy 
public abstract ParameterInfo[] GetParameters()

Return Value

Type: System.Reflection.ParameterInfo[]
An array of type ParameterInfo containing information that matches the signature of the method (or constructor) reflected by this MethodBase instance.

Implements

_MethodBase.GetParameters()

The following example uses the GetParameters method to retrieve the parameters of the Invoke method of a delegate.

The example defines a delegate named MyDelegate and an event named ev of type MyDelegate. The code in the Main method discovers the event signature by getting the delegate type of the event, getting the Invoke method of the delegate type, and then retrieving and displaying the parameters.

C#
C++
VB
Copy 

// The following example uses instances of classes in 
// the System.Reflection namespace to discover an event argument type.
using System;
using System.Reflection;

public delegate void MyDelegate(int i);
public class MainClass 
{
    public event MyDelegate ev;

    public static void Main() 
    {
        Type delegateType = typeof(MainClass).GetEvent("ev").EventHandlerType;
        MethodInfo invoke = delegateType.GetMethod("Invoke");
        ParameterInfo[] pars = invoke.GetParameters();
        foreach (ParameterInfo p in pars) 
        {
            Console.WriteLine(p.ParameterType);
        }
    }
}

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
Did you find this helpful?
(1500 characters remaining)
Community Content Add
Annotations FAQ
Return value
It could be useful to add a description of return value in case of parameterless method. I assume it returns a collection with 0 length.
History
Missing Information about sort order
The article does not mention the sort order of the return value.
I would assume, that the parameters are sorted by occurence, but without this information no one can be sure.

I suggest, that this article mentions either the sort order or clearly states that there is no defined sort order and the caller has to sort the result on his own.

History