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AOP using System.Reflection.Emit - Code Injection IL

, 2 Jun 2006
Very often, we need to intercept method calls and enable some code to run before/after a method call of an external type (.NET object). Learn how to do this.
WinTestAspect
App.ico
bin
Debug
SadasSof.Aspects.dll
WinTestAspect.exe
obj
Debug
temp
TempPE
WinTestAspect.csproj.user
SadasSoft.Aspects
bin
Debug
SadasSof.Aspects.dll
obj
Debug
InterceptorSample.dll
temp
TempPE
Release
Sadas.Reflection.dll
temp
TempPE
SadasSof.Aspects.csproj.user
WebTestAspects
bin
EnterpriseDemo.dll
SadasSof.Aspects.dll
WebTestAspects.dll
Global.asax
WebTestAspects.csproj.webinfo
EnterpriseDemo.dll
SadasSof.Aspects.dll
WinTestAspect.exe
<VisualStudioProject>
    <CSHARP
        ProjectType = "Local"
        ProductVersion = "7.10.3077"
        SchemaVersion = "2.0"
        ProjectGuid = "{8DAA7F92-5DDD-46DF-A969-6ADCA83D8805}"
    >
        <Build>
            <Settings
                ApplicationIcon = ""
                AssemblyKeyContainerName = ""
                AssemblyName = "SadasSof.Aspects"
                AssemblyOriginatorKeyFile = ""
                DefaultClientScript = "JScript"
                DefaultHTMLPageLayout = "Grid"
                DefaultTargetSchema = "IE50"
                DelaySign = "false"
                OutputType = "Library"
                PreBuildEvent = ""
                PostBuildEvent = ""
                RootNamespace = "SadasSof.Aspects"
                RunPostBuildEvent = "OnBuildSuccess"
                StartupObject = ""
            >
                <Config
                    Name = "Debug"
                    AllowUnsafeBlocks = "false"
                    BaseAddress = "285212672"
                    CheckForOverflowUnderflow = "false"
                    ConfigurationOverrideFile = ""
                    DefineConstants = "DEBUG;TRACE"
                    DocumentationFile = ""
                    DebugSymbols = "true"
                    FileAlignment = "4096"
                    IncrementalBuild = "false"
                    NoStdLib = "false"
                    NoWarn = ""
                    Optimize = "false"
                    OutputPath = "bin\Debug\"
                    RegisterForComInterop = "false"
                    RemoveIntegerChecks = "false"
                    TreatWarningsAsErrors = "false"
                    WarningLevel = "4"
                />
                <Config
                    Name = "Release"
                    AllowUnsafeBlocks = "false"
                    BaseAddress = "285212672"
                    CheckForOverflowUnderflow = "false"
                    ConfigurationOverrideFile = ""
                    DefineConstants = "TRACE"
                    DocumentationFile = ""
                    DebugSymbols = "false"
                    FileAlignment = "4096"
                    IncrementalBuild = "false"
                    NoStdLib = "false"
                    NoWarn = ""
                    Optimize = "true"
                    OutputPath = "bin\Release\"
                    RegisterForComInterop = "false"
                    RemoveIntegerChecks = "false"
                    TreatWarningsAsErrors = "false"
                    WarningLevel = "4"
                />
            </Settings>
            <References>
                <Reference
                    Name = "System"
                    AssemblyName = "System"
                    HintPath = "..\..\..\WINDOWS\Microsoft.NET\Framework\v1.1.4322\System.dll"
                />
                <Reference
                    Name = "System.Data"
                    AssemblyName = "System.Data"
                    HintPath = "..\..\..\WINDOWS\Microsoft.NET\Framework\v1.1.4322\System.Data.dll"
                />
                <Reference
                    Name = "System.XML"
                    AssemblyName = "System.Xml"
                    HintPath = "..\..\..\WINDOWS\Microsoft.NET\Framework\v1.1.4322\System.XML.dll"
                />
            </References>
        </Build>
        <Files>
            <Include>
                <File
                    RelPath = "AspectAttribute.cs"
                    SubType = "Code"
                    BuildAction = "Compile"
                />
                <File
                    RelPath = "AssemblyInfo.cs"
                    SubType = "Code"
                    BuildAction = "Compile"
                />
                <File
                    RelPath = "Helper.cs"
                    SubType = "Code"
                    BuildAction = "Compile"
                />
                <File
                    RelPath = "Injection.cs"
                    SubType = "Code"
                    BuildAction = "Compile"
                />
            </Include>
        </Files>
    </CSHARP>
</VisualStudioProject>

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About the Author

Roberto Loreto
Web Developer
Spain Spain
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