Assembly.LoadFrom（）拋出異常

public Assembly LoadAssembly(string assemblyName) //@"D://MyAssembly.dll" 

{ 
    m_assembly = Assembly.LoadFrom(assemblyName); 
    return m_assembly; 
}

如果我把「MyAssembly.dll」放在D：及其拷貝到「bin」目錄下，該方法會成功執行。但是，我刪除它們中的任何一個，它都會拋出異常。消息如下：Assembly.LoadFrom（）拋出異常

無法加載文件或程序集'MyAssembly，Version = 1.0.0.0，Culture = neutral，PublicKeyToken = null'或其依賴項之一。該系統找不到指定的文件。

我想加載D：中存在的程序集。爲什麼我需要將其副本同時放入「bin」目錄？

來源

2011-07-02 Domi.Zhang

也許MyAssembly.dll引用了一些不在目錄中的程序集。把所有的程序集放在同一個目錄下。

或者你可以處理AppDomain.CurrentDomain，AssemblyResolve事件加載所需的裝配

private string asmBase ; 
public void LoaddAssembly(string assemblyName) 
{ 
    asmBase = System.IO.Path.GetDirectoryName(assemblyName); 

    AppDomain.CurrentDomain.AssemblyResolve += new ResolveEventHandler(CurrentDomain_AssemblyResolve); 
    System.Reflection.Assembly asm = System.Reflection.Assembly.Load(System.IO.File.ReadAllBytes(assemblyName)); 
} 

private Assembly CurrentDomain_AssemblyResolve(object sender, ResolveEventArgs args) 
{ 
    //This handler is called only when the common language runtime tries to bind to the assembly and fails. 

    //Retrieve the list of referenced assemblies in an array of AssemblyName. 
    Assembly MyAssembly, objExecutingAssemblies; 
    string strTempAssmbPath = ""; 
    objExecutingAssemblies = args.RequestingAssembly; 
    AssemblyName[] arrReferencedAssmbNames = objExecutingAssemblies.GetReferencedAssemblies(); 

    //Loop through the array of referenced assembly names. 
    foreach (AssemblyName strAssmbName in arrReferencedAssmbNames) 
    { 
     //Check for the assembly names that have raised the "AssemblyResolve" event. 
     if (strAssmbName.FullName.Substring(0, strAssmbName.FullName.IndexOf(",")) == args.Name.Substring(0, args.Name.IndexOf(","))) 
     { 
      //Build the path of the assembly from where it has to be loaded.     
      strTempAssmbPath = asmBase + "\\" + args.Name.Substring(0, args.Name.IndexOf(",")) + ".dll"; 
      break; 
     } 

    } 
    //Load the assembly from the specified path.      
    MyAssembly = Assembly.LoadFrom(strTempAssmbPath); 

    //Return the loaded assembly. 
    return MyAssembly; 
}

來源

2011-07-02 05:18:49 DeveloperX

對不起，我得到了一些錯誤。在上面的代碼中沒問題，此處顯示異常： AppDomain domain = AppDomain.CreateDomain（「NewDomain」，null，appDomainSetup）; Loader =（Loader）domain.CreateInstanceFromAndUnwrap（@「C：\\ Loader.dll」，「Loader.Loader」）; assembly = Loader.LoadAssembly（@「D：//MyAssembly.dll」）; 例外是最後一行。我正在加載新的AppDomain中的.dll文件。該程序集在LoadAssembly方法中成功加載，但在調用方拋出異常。 –

我認爲這個異常出現的原因是我將程序集從AppDomain轉移到了另一個AppDomain。 –

http://social.msdn.microsoft.com/Forums/en-US/netfxbcl/thread/70ad4fcd-531d-4494-a9bb-1684d8b3f3ec/ –

要在任何特定的例外情況，你可以試試這個：

try 
{ 
    return Assembly.LoadFrom(assemblyName); 
} 
catch (Exception ex) 
{ 
    var reflection = ex as ReflectionTypeLoadException; 

    if (reflection != null) 
    { 
     foreach (var exception in reflection.LoaderExceptions) 
     { 
      // log/inspect the message 
     } 

     return null; 
    } 
}

來源

2011-07-02 06:03:33

Assembly.LoadFrom（）拋出異常

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