LocalBuilder Class
Represents a local variable within a method or constructor.
Assembly: mscorlib (in mscorlib.dll)
A LocalBuilder object can be defined using the DeclareLocal method.
The following example creates a static method (Shared in Visual Basic) named Function1 that returns a string and has a parameter of type Int32. In the body of the method, the code example creates LocalBuilder objects representing two local variables, and sets symbol information for the local variables. The method does not do anything significant, but the method body demonstrates storing a parameter to a local variable, storing a literal string to a local variable, and loading a local variable.
Imports System Imports System.Reflection Imports System.Reflection.Emit Imports System.Threading Class LocalBuilder_Sample Public Shared Sub Main() ' Create an assembly. Dim myAssemblyName As New AssemblyName() myAssemblyName.Name = "SampleAssembly" Dim myAssembly As AssemblyBuilder = _ Thread.GetDomain().DefineDynamicAssembly( myAssemblyName, _ AssemblyBuilderAccess.RunAndSave ) ' Create a module. For a single-file assembly the module ' name is usually the same as the assembly name. Dim myModule As ModuleBuilder = _ myAssembly.DefineDynamicModule(myAssemblyName.Name, _ myAssemblyName.Name & ".dll", True) ' Define a public class 'Example'. Dim myTypeBuilder As TypeBuilder = _ myModule.DefineType("Example", TypeAttributes.Public) ' Create the 'Function1' public method, which takes an Integer ' and returns a string. Dim myMethod As MethodBuilder = myTypeBuilder.DefineMethod("Function1", _ MethodAttributes.Public Or MethodAttributes.Static, _ GetType(String), New Type() { GetType(Integer) }) ' Generate IL for 'Function1'. The function body demonstrates ' assigning an argument to a local variable, assigning a ' constant string to a local variable, and putting the contents ' of local variables on the stack. Dim myMethodIL As ILGenerator = myMethod.GetILGenerator() ' Create local variables named myString and myInt. Dim myLB1 As LocalBuilder = myMethodIL.DeclareLocal(GetType(String)) myLB1.SetLocalSymInfo("myString") Console.WriteLine("local 'myString' type is: {0}", myLB1.LocalType) Dim myLB2 As LocalBuilder = myMethodIL.DeclareLocal(GetType(Integer)) myLB2.SetLocalSymInfo("myInt", 1, 2) Console.WriteLine("local 'myInt' type is: {0}", myLB2.LocalType) ' Store the function argument in myInt. myMethodIL.Emit(OpCodes.Ldarg_0 ) myMethodIL.Emit(OpCodes.Stloc_1 ) ' Store a literal value in myString, and return the value. myMethodIL.Emit(OpCodes.Ldstr, "string value" ) myMethodIL.Emit(OpCodes.Stloc_0 ) myMethodIL.Emit(OpCodes.Ldloc_0 ) myMethodIL.Emit(OpCodes.Ret ) ' Create "Example" class. Dim myType1 As Type = myTypeBuilder.CreateType() Console.WriteLine("'Example' is created.") myAssembly.Save(myAssemblyName.Name & ".dll") Console.WriteLine( "'{0}' is created.", myAssemblyName.Name & ".dll" ) ' Invoke 'Function1' method of 'Example', passing the value 42. Dim myObject2 As Object = myType1.InvokeMember("Function1", _ BindingFlags.InvokeMethod, Nothing, Nothing, New Object() { 42 }) Console.WriteLine("Example.Function1 returned: {0}", myObject2) End Sub End Class ' This code example produces the following output: ' 'local 'myString' type is: System.String 'local 'myInt' type is: System.Int32 ''Example' is created. ''SampleAssembly.dll' is created. 'Example.Function1 returned: string value
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.