为动态编译代码反序列化程序集时出错

时间:2012-12-27 22:00:25

标签: vb.net .net-assembly binary-deserialization

尝试序列化动态生成/编译的程序集以存储到SQL中,然后提取程序集以供使用。但是,我遇到了一个让我疯狂的错误。

无法加载文件或程序集'< random code>,Version = 0.0.0.0,Culture = neutral,PublicKeyToken = null'或其中一个依赖项。系统找不到指定的文件。

当我尝试对序列进行反序列化时。会欣赏任何指针。部分代码:

    '--------------------------------------------------------------
    'This section SUCCESSFULLY Compile & Execute the Dynamic Code
    '  vsResult returns ok.
    '  **Note: This is partial code to create the compiler.
    '--------------------------------------------------------------
    Dim voCompileResults As System.CodeDom.Compiler.CompilerResults = voCompiler.CompileAssemblyFromSource(voCompilerParams, sb.ToString)
    Dim voAssembly As Reflection.Assembly = voCompileResults.CompiledAssembly
    Dim voInstance As Object = Activator.CreateInstance(voAssembly.GetType("libARules.clsMyRoutine"), {New libARules.Sys.clsInterProcessData(New System.Xml.XmlDocument), New libArrowOps.clsDBAccess})
    Dim vsResult As String = voInstance.GetType().InvokeMember("Run", Reflection.BindingFlags.InvokeMethod, Nothing, voInstance, Nothing)

    '----------------------------------------------------
    'Attempt to Serialize the Assembly for store/forward
    '----------------------------------------------------
    Dim voMemStream As New IO.MemoryStream
    Dim voBF As New Runtime.Serialization.Formatters.Binary.BinaryFormatter
    voBF.AssemblyFormat = Runtime.Serialization.Formatters.FormatterAssemblyStyle.Simple
    voBF.Serialize(voMemStream, voCompileResults.CompiledAssembly)

    '--------------------------------------
    'Reset the MemoryStream position to begining
    '--------------------------------------
    voMemStream.Position = 0

    '--------------------------------------
    'Attempt to De-Serialize the MemoryStream back to an assembly
    '--------------------------------------
    voBF = New Runtime.Serialization.Formatters.Binary.BinaryFormatter
    voBF.AssemblyFormat = Runtime.Serialization.Formatters.FormatterAssemblyStyle.Simple
    voAssembly = voBF.Deserialize(voMemStream)
    '----- **Error Here** ---------------------------------

错误此时:voAssembly = voBF.Deserialize(voMemStream)

无法加载文件或程序集'...< random code> ...,Version = 0.0.0.0,Culture = neutral,PublicKeyToken = null'或其依赖项之一。 系统找不到指定的文件

1 个答案:

答案 0 :(得分:1)

好的,我终于在午睡后弄清楚了......在这里为“后代”记录:P

显然,我不应该序列化/反序列化CompiledAssembly。

    '-----------------------------------------------------
    'Instead of Generating in Memory, generate it into a temporary Assembly file (I don't need the CompiledAssembly from the compiler).
    ' Note: Again, this is partial code, with only the important parts here.
    '-----------------------------------------------------
    voCompilerParams.ReferencedAssemblies.Add("mscorlib.dll")
    voCompilerParams.GenerateInMemory = False
    voCompilerParams.OutputAssembly = System.IO.Path.Combine(System.IO.Path.GetTempPath(), "deleteNow_" & Guid.NewGuid().ToString() & ".dll")

    Dim voCompileResults As System.CodeDom.Compiler.CompilerResults = voCompiler.CompileAssemblyFromSource(voCompilerParams, sb.ToString)

    '--------------------------------------------------------------------------
    'After the Assembly is generated, open the Assembly file and read the entire content into a byte buffer.
    'Note that this byte buffer **CAN BE STORED into an SQL BLOB field.**
    '--------------------------------------------------------------------------
    Dim voInstance As Object = Nothing
    Dim vsResult As String = ""
    Dim voAssembly As Reflection.Assembly = Nothing
    If Not voCompileResults.Errors.HasErrors Then
        '----------------------------------------------------------------
        'No compilation error, open and read the generated assembly file
        '  into a Byte array.
        '----------------------------------------------------------------
        Dim voBuffer() As Byte = Nothing
        Dim voFileStream As IO.FileStream = IO.File.OpenRead(voCompilerParams.OutputAssembly)
        If voFileStream.CanRead Then
            ReDim voBuffer(voFileStream.Length - 1)
            voFileStream.Read(voBuffer, 0, voFileStream.Length)
        End If
        voFileStream.Close()
        IO.File.Delete(voCompilerParams.OutputAssembly) 'Clean-up after ourselves.

        '----------------------------------------------------------------
        'Now, re-create the CompiledAssembly from the Byte array.
        '----------------------------------------------------------------
        If Not IsNothing(voBuffer) Then
            voAssembly = Reflection.Assembly.Load(voBuffer)
        End If
        If Not IsNothing(voAssembly) Then
            '--------------------------------------------
            'Instantiate my dynamically compiled class
            '--------------------------------------------
            voInstance = Activator.CreateInstance(voAssembly.GetType("libARules.clsMyRoutine"), {New libARules.Sys.clsInterProcessData(New System.Xml.XmlDocument), New libMyLib.clsMyClass})
            If Not IsNothing(voInstance) Then
               '------------------------------------------------
               'Run my dynamic code to proof that it is working
               '------------------------------------------------
                vsResult = voInstance.GetType().InvokeMember("Run", Reflection.BindingFlags.InvokeMethod, Nothing, voInstance, Nothing)
            End If
        End If
    End If

然后...... vsResult被填充了。这是一个概念证明CompiledAssembly可以存储并在以后重用。 NOTING 在从voAssembly重新创建voBuffer()对象之前删除了实际的临时程序集文件。