DefaultParameterValueAttribute(Object) Constructor
Definition
Important
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Initializes a new instance of the DefaultParameterValueAttribute class with the default value of a parameter.
public:
DefaultParameterValueAttribute(System::Object ^ value);public DefaultParameterValueAttribute (object value);public DefaultParameterValueAttribute (object? value);new System.Runtime.InteropServices.DefaultParameterValueAttribute : obj -> System.Runtime.InteropServices.DefaultParameterValueAttributePublic Sub New (value As Object)Parameters
- value
- Object
An object that represents the default value of a parameter.
Examples
The following code example demonstrates how to apply the DefaultParameterValueAttribute attribute to a parameter of a method written in C#. The OptionalAttribute attribute is also used to enable the method to be called without any arguments.
using System;
using System.Runtime.InteropServices;
public class Program
{
public static void MethodWithDefaultParam([Optional, DefaultParameterValue("DEFAULT_PARAM_VALUE")] string str)
{
Console.WriteLine($"The passed value is: {str}");
}
public static void Main()
{
MethodWithDefaultParam(); // The passed value is: DEFAULT_PARAM_VALUE
MethodWithDefaultParam("NEW_VALUE"); // The passed value is: NEW_VALUE
}
}
Remarks
Use this constructor to apply the DefaultParameterValueAttribute attribute to a parameter written in a language such as Microsoft Visual C# that does not support default parameters.
