本文整理汇总了VB.NET中System.Reflection.Emit.MethodBuilder.DefineGenericParameters方法的典型用法代码示例。如果您正苦于以下问题:VB.NET MethodBuilder.DefineGenericParameters方法的具体用法?VB.NET MethodBuilder.DefineGenericParameters怎么用?VB.NET MethodBuilder.DefineGenericParameters使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Reflection.Emit.MethodBuilder
的用法示例。
在下文中一共展示了MethodBuilder.DefineGenericParameters方法的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的VB.NET代码示例。
示例1: DemoMethodBuilder
' 导入命名空间
Imports System.Reflection
Imports System.Reflection.Emit
Class DemoMethodBuilder
Public Shared Sub Main()
' Creating a dynamic assembly requires an AssemblyName
' object, and the current application domain.
'
Dim asmName As New AssemblyName("DemoMethodBuilder1")
Dim domain As AppDomain = AppDomain.CurrentDomain
Dim demoAssembly As AssemblyBuilder = _
domain.DefineDynamicAssembly(asmName, _
AssemblyBuilderAccess.RunAndSave)
' Define the module that contains the code. For an
' assembly with one module, the module name is the
' assembly name plus a file extension.
Dim demoModule As ModuleBuilder = _
demoAssembly.DefineDynamicModule( _
asmName.Name, _
asmName.Name & ".dll")
Dim demoType As TypeBuilder = demoModule.DefineType( _
"DemoType", _
TypeAttributes.Public Or TypeAttributes.Abstract)
' Define a Shared, Public method with standard calling
' conventions. Do not specify the parameter types or the
' return type, because type parameters will be used for
' those types, and the type parameters have not been
' defined yet.
Dim demoMethod As MethodBuilder = _
demoType.DefineMethod("DemoMethod", _
MethodAttributes.Public Or MethodAttributes.Static)
' Defining generic parameters for the method makes it a
' generic method. By convention, type parameters are
' single alphabetic characters. T and U are used here.
'
Dim typeParamNames() As String = {"T", "U"}
Dim typeParameters() As GenericTypeParameterBuilder = _
demoMethod.DefineGenericParameters(typeParamNames)
' The second type parameter is constrained to be a
' reference type.
typeParameters(1).SetGenericParameterAttributes( _
GenericParameterAttributes.ReferenceTypeConstraint)
' Use the IsGenericMethod property to find out if a
' dynamic method is generic, and IsGenericMethodDefinition
' to find out if it defines a generic method.
Console.WriteLine("Is DemoMethod generic? {0}", _
demoMethod.IsGenericMethod)
Console.WriteLine("Is DemoMethod a generic method definition? {0}", _
demoMethod.IsGenericMethodDefinition)
' Set parameter types for the method. The method takes
' one parameter, and its type is specified by the first
' type parameter, T.
Dim params() As Type = {typeParameters(0)}
demoMethod.SetParameters(params)
' Set the return type for the method. The return type is
' specified by the second type parameter, U.
demoMethod.SetReturnType(typeParameters(1))
' Generate a code body for the method. The method doesn't
' do anything except return Nothing.
'
Dim ilgen As ILGenerator = demoMethod.GetILGenerator()
ilgen.Emit(OpCodes.Ldnull)
ilgen.Emit(OpCodes.Ret)
' Complete the type.
Dim dt As Type = demoType.CreateType()
' To bind types to a dynamic generic method, you must
' first call the GetMethod method on the completed type.
' You can then define an array of types, and bind them
' to the method.
Dim m As MethodInfo = dt.GetMethod("DemoMethod")
Dim typeArgs() As Type = _
{GetType(String), GetType(DemoMethodBuilder)}
Dim bound As MethodInfo = m.MakeGenericMethod(typeArgs)
' Display a string representing the bound method.
Console.WriteLine(bound)
' Save the assembly, so it can be examined with Ildasm.exe.
demoAssembly.Save(asmName.Name & ".dll")
End Sub
End Class
输出:
Is DemoMethod generic? True Is DemoMethod a generic method definition? True DemoMethodBuilder DemoMethod[String,DemoMethodBuilder](System.String)