本文整理汇总了VB.NET中System.Reflection.Emit.FieldBuilder类的典型用法代码示例。如果您正苦于以下问题：VB.NET FieldBuilder类的具体用法？VB.NET FieldBuilder怎么用？VB.NET FieldBuilder使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了FieldBuilder类的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: FieldBuilder_Sample
' 导入命名空间
Imports System.Reflection
Imports System.Reflection.Emit
Public Module FieldBuilder_Sample
Private Function CreateType() As Type
' Create an assembly.
Dim assemName As New AssemblyName()
assemName.Name = "DynamicAssembly"
Dim assemBuilder As AssemblyBuilder = AssemblyBuilder.DefineDynamicAssembly(assemName,
AssemblyBuilderAccess.Run)
' Create a dynamic module in Dynamic Assembly.
Dim modBuilder As ModuleBuilder = assemBuilder.DefineDynamicModule("DynamicModule")
' Define a public class named "DynamicClass" in the assembly.
Dim typBuilder As TypeBuilder = modBuilder.DefineType("DynamicClass",
TypeAttributes.Public)
' Define a private String field named "DynamicField" in the type.
Dim fldBuilder As FieldBuilder = typBuilder.DefineField("DynamicField",
GetType(String), FieldAttributes.Private Or FieldAttributes.Static)
' Create the constructor.
Dim constructorArgs As Type() = {GetType(String)}
Dim constructor As ConstructorBuilder =
typBuilder.DefineConstructor(MethodAttributes.Public,
CallingConventions.Standard, constructorArgs)
Dim constructorIL As ILGenerator = constructor.GetILGenerator()
constructorIL.Emit(OpCodes.Ldarg_0)
Dim superConstructor As ConstructorInfo = GetType(Object).GetConstructor(New Type() {})
constructorIL.Emit(OpCodes.Call, superConstructor)
constructorIL.Emit(OpCodes.Ldarg_0)
constructorIL.Emit(OpCodes.Ldarg_1)
constructorIL.Emit(OpCodes.Stfld, fldBuilder)
constructorIL.Emit(OpCodes.Ret)
' Create the DynamicMethod method.
Dim methBuilder As MethodBuilder = typBuilder.DefineMethod("DynamicMethod",
MethodAttributes.Public, GetType(String), Nothing)
Dim methodIL As ILGenerator = methBuilder.GetILGenerator()
methodIL.Emit(OpCodes.Ldarg_0)
methodIL.Emit(OpCodes.Ldfld, fldBuilder)
methodIL.Emit(OpCodes.Ret)
Console.WriteLine($"Name : {fldBuilder.Name}")
Console.WriteLine($"DeclaringType : {fldBuilder.DeclaringType}")
Console.WriteLine($"Type : {fldBuilder.FieldType}")
Return typBuilder.CreateType()
End Function
Public Sub Main()
Dim dynType As Type = CreateType()
Try
' Create an instance of the "HelloWorld" class.
Dim helloWorld As Object = Activator.CreateInstance(dynType, New Object() {"HelloWorld"})
' Invoke the "DynamicMethod" method of the "DynamicClass" class.
Dim obj As Object = dynType.InvokeMember("DynamicMethod",
BindingFlags.InvokeMethod, Nothing, helloWorld, Nothing)
Console.WriteLine($"DynamicClass.DynamicMethod returned: ""{obj}""")
Catch e As MethodAccessException
Console.WriteLine($"{e.GetType().Name}: {e.Message}")
End Try
End Sub
End Module