static void ShowAttributeTypeIds( )
{
// Get the class type, and then get the MethodInfo object
// for TestMethod to access its metadata.
Type clsType = typeof(TestClass);
MethodInfo mInfo = clsType.GetMethod("TestMethod");
// There will be two elements in pInfoArray, one for each parameter.
ParameterInfo[] pInfoArray = mInfo.GetParameters();
if (pInfoArray != null)
{
// Create an instance of the param array attribute on strList.
ParamArrayAttribute listArrayAttr = (ParamArrayAttribute)
Attribute.GetCustomAttribute(pInfoArray[1],
typeof(ParamArrayAttribute));
// Create an instance of the argument usage attribute on strArray.
ArgumentUsageAttribute arrayUsageAttr1 = (ArgumentUsageAttribute)
Attribute.GetCustomAttribute(pInfoArray[0],
typeof(ArgumentUsageAttribute));
// Create another instance of the argument usage attribute
// on strArray.
ArgumentUsageAttribute arrayUsageAttr2 = (ArgumentUsageAttribute)
Attribute.GetCustomAttribute(pInfoArray[0],
typeof(ArgumentUsageAttribute));
// Create an instance of the argument usage attribute on strList.
ArgumentUsageAttribute listUsageAttr = (ArgumentUsageAttribute)
Attribute.GetCustomAttribute(pInfoArray[1],
typeof(ArgumentUsageAttribute));
// Display the attributes and corresponding TypeId values.
Console.WriteLine("\n\"{0}\" \nTypeId: {1}",
listArrayAttr.ToString(), listArrayAttr.TypeId);
Console.WriteLine("\n\"{0}\" \nTypeId: {1}",
arrayUsageAttr1.ToString(), arrayUsageAttr1.TypeId);
Console.WriteLine("\n\"{0}\" \nTypeId: {1}",
arrayUsageAttr2.ToString(), arrayUsageAttr2.TypeId);
Console.WriteLine("\n\"{0}\" \nTypeId: {1}",
listUsageAttr.ToString(), listUsageAttr.TypeId);
}
else
{
Console.WriteLine("The parameters information could " +
"not be retrieved for method {0}.", mInfo.Name);
}
}
// Create Attribute objects and compare them.
static void Main( )
{
Console.WriteLine("This example of Attribute.Equals( object ) " +
"generates the following output.");
// Get the class type, and then get the MethodInfo object
// for TestMethod to access its metadata.
Type clsType = typeof(TestClass);
MethodInfo mInfo = clsType.GetMethod("TestMethod");
// There will be two elements in pInfoArray, one for each parameter.
ParameterInfo[] pInfoArray = mInfo.GetParameters();
if (pInfoArray != null)
{
// Create an instance of the argument usage attribute on strArray.
ArgumentUsageAttribute arrayUsageAttr1 = (ArgumentUsageAttribute)
Attribute.GetCustomAttribute(pInfoArray[0],
typeof(ArgumentUsageAttribute));
// Create another instance of the argument usage attribute
// on strArray.
ArgumentUsageAttribute arrayUsageAttr2 = (ArgumentUsageAttribute)
Attribute.GetCustomAttribute(pInfoArray[0],
typeof(ArgumentUsageAttribute));
// Create an instance of the argument usage attribute on strList.
ArgumentUsageAttribute listUsageAttr = (ArgumentUsageAttribute)
Attribute.GetCustomAttribute(pInfoArray[1],
typeof(ArgumentUsageAttribute));
// Create an instance of the argument ID attribute on strArray.
ArgumentIDAttribute arrayIDAttr1 = (ArgumentIDAttribute)
Attribute.GetCustomAttribute(pInfoArray[0],
typeof(ArgumentIDAttribute));
// Create another instance of the argument ID attribute on strArray.
ArgumentIDAttribute arrayIDAttr2 = (ArgumentIDAttribute)
Attribute.GetCustomAttribute(pInfoArray[0],
typeof(ArgumentIDAttribute));
// Create an instance of the argument ID attribute on strList.
ArgumentIDAttribute listIDAttr = (ArgumentIDAttribute)
Attribute.GetCustomAttribute(pInfoArray[1],
typeof(ArgumentIDAttribute));
// Compare various pairs of attributes for equality.
Console.WriteLine("\nCompare a usage attribute instance to " +
"another instance of the same attribute:");
Console.WriteLine(" \"{0}\" == \n \"{1}\" ? {2}",
arrayUsageAttr1.ToString(), arrayUsageAttr2.ToString(),
arrayUsageAttr1.Equals(arrayUsageAttr2));
Console.WriteLine("\nCompare a usage attribute to " +
"another usage attribute:");
Console.WriteLine(" \"{0}\" == \n \"{1}\" ? {2}",
arrayUsageAttr1.ToString(), listUsageAttr.ToString(),
arrayUsageAttr1.Equals(listUsageAttr));
Console.WriteLine("\nCompare an ID attribute instance to " +
"another instance of the same attribute:");
Console.WriteLine(" \"{0}\" == \n \"{1}\" ? {2}",
arrayIDAttr1.ToString(), arrayIDAttr2.ToString(),
arrayIDAttr1.Equals(arrayIDAttr2));
Console.WriteLine("\nCompare an ID attribute to another ID attribute:");
Console.WriteLine(" \"{0}\" == \n \"{1}\" ? {2}",
arrayIDAttr1.ToString(), listIDAttr.ToString(),
arrayIDAttr1.Equals(listIDAttr));
}
else
{
Console.WriteLine("The parameters information could " +
"not be retrieved for method {0}.", mInfo.Name);
}
}