在运行时加载程序集并调用方法并卸载程序集
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在创建应用程序时，它会连接到多个sql数据库并从数据库中获取一些详细信息，
在此应用程序中，我必须加密数据库连接详细信息，例如用户名密码。是的，它的简单明了而简单，只需编写一个方法来解密凭据即可。
但就我而言，我必须依靠第三方加密机制来解密凭据。更重要的是，我必须连接到多个sql服务器，这将再次使用其他一些加密方法。因此，我的应用程序被迫动态加载加密程序集并调用加密方法。
但是，当我从Assembly.LoadFile（\“ Path \”）加载程序集窗体时，无法卸载已加载的程序集。我想我已经在单独的应用程序域中加载了该程序集，并调用了相关方法并卸载了该应用程序域。我在这方面需要一些帮助。由于我缺乏知识，我无法调用所需的方法。我的代码如下。请帮助我。
类ApplicationSettings
{
private static ApplicationSettings m_ApplicationSettings;
public String m_ServerName { get; private set; }
public String m_DatabaseName { get; private set; }
public String m_UserID { get; private set; }
public String m_Password { get; private set; }
public String m_EncryptionDLLPath{ get; private set; }
public String m_NameSpace { get; private set; }
public String m_ClassName { get; private set; }
public String m_EncryptionMethodName { get; private set; }
public String m_DecryptionMethodName { get; private set; }
private ApplicationSettings()
{
m_ApplicationSettings = this;
}
public static ApplicationSettings CurrentValues
{
get
{
return m_ApplicationSettings;
}
private set
{
m_ApplicationSettings = value;
}
}
internal static void Initialize()
{
CommonFunctions.DataEncryption _enc = new CommonFunctions.DataEncryption();
ApplicationSettings.CurrentValues = new ApplicationSettings();
ApplicationSettings.CurrentValues.m_EncryptionDLLPath = @\"C:\\Users\\Administrator\\Documents\\Visual Studio 2010\\Projects\\TestApp\\TestApp\\bin\\Debug\\AppSec.dll\";
ApplicationSettings.CurrentValues.m_NameSpace = \"AppSec\";
ApplicationSettings.CurrentValues.m_ClassName = \"AppSecEncDec\";
ApplicationSettings.CurrentValues.m_EncryptionMethodName = \"Encrypt\";
ApplicationSettings.CurrentValues.m_DecryptionMethodName = \"Decrypt\";
ApplicationSettings.CurrentValues.m_Password = _enc.Decrypt(\"pzBS3EJDoGM=\");
ApplicationSettings.CurrentValues.m_UserID = \"sa\";
}
}
AppDomain DomainName;
//Call the Encryption Method
public String Encrypt(Object _DataToEncrypt)
{
}
//Call the Decryption Method
public String Decrypt(Object _DataToDecrypt)
{
String _Decrypt = \"\";
String assemblyFileName = ApplicationSettings.CurrentValues.m_EncryptionDLLPath;
String assemblyName = ApplicationSettings.CurrentValues.m_NameSpace;
//Setup the evidence
Evidence evidence = new Evidence(AppDomain.CurrentDomain.Evidence);
AppDomain TestDomain = AppDomain.CreateDomain(
\"TestDomain\", //The friendly name of the domain.
evidence, //Evidence mapped through the security policy to establish a top-of-stack permission set.
AppDomain.CurrentDomain.BaseDirectory, // The base directory that the assembly resolver uses to probe for assemblies.
System.IO.Path.GetFullPath(assemblyFileName), // The path relative to the base directory where the assembly resolver should probe for private assemblies.
true // If true, a shadow copy of an assembly is loaded into this application domain.
);
string s = TestDomain.Load(assemblyName).FullName;
string[] myparam = new String[1];
myparam[0] = \"test\";
TestDomain.CreateInstance(TestDomain.Load(assemblyName).GetName().ToString(), ApplicationSettings.CurrentValues.m_NameSpace + \".\" + ApplicationSettings.CurrentValues.m_ClassName).CreateObjRef(GetType());
//her i need to execute the Encrypt method which will load form the third party encryption mechanisam
//method name will be returnd on this parameter in application settings Classes.ApplicationSettings.CurrentValues.m_EncryptionMethodName ;
UloadAssembly();
return _Decrypt;
}
public void UloadAssembly()
{
//Unload the loaded appdomain
AppDomain.Unload(DomainName);
GC.Collect();
}
}
没有找到相关结果
已邀请:
1 个回复
悸翠疮武昏
public String Encrypt(Object _DataToEncrypt) { try { String _Encrypt = \"\"; LoadAssembly(); ShowLoadedAssemblies(); if (ClassInstance != null) { MethodInfo EncryptionMethod = ClassInstance.GetType().GetMethod(Classes.ApplicationSettings.CurrentValues.m_EncryptionMethodName); ; if (EncryptionMethod != null) { object[] myparam = new object[1]; myparam[0] = _DataToEncrypt; _Encrypt = (string)EncryptionMethod.Invoke(null, myparam); } } UloadAssembly(); ShowLoadedAssemblies(); return _Encrypt; } catch (Exception ex) { throw new Exception(ex.Message); } } //Call the Decryption Method public String Decrypt(Object _DataToDecrypt) { String _Decrypt = \"\"; LoadAssembly(); ShowLoadedAssemblies(); if (ClassInstance != null) { MethodInfo DecryptionMethod = ClassInstance.GetType().GetMethod(Classes.ApplicationSettings.CurrentValues.m_DecryptionMethodName);; if (DecryptionMethod != null) { object[] myparam = new object[1]; myparam[0] = _DataToDecrypt; _Decrypt = (string)DecryptionMethod.Invoke(null, myparam); } } UloadAssembly(); ShowLoadedAssemblies(); return _Decrypt; } //Loading the Assembly public void LoadAssembly() { Evidence evi = new Evidence(AppDomain.CurrentDomain.Evidence); DomainName = AppDomain.CreateDomain(Classes.ApplicationSettings.CurrentValues.m_NameSpace , evi , AppDomain.CurrentDomain.BaseDirectory , Classes.ApplicationSettings.CurrentValues.m_EncryptionDLLPath , true ); String LoadingAssemblyName = AssemblyName.GetAssemblyName(Classes.ApplicationSettings.CurrentValues.m_EncryptionDLLPath).FullName; ClassInstance = DomainName.CreateInstanceAndUnwrap(LoadingAssemblyName , Classes.ApplicationSettings.CurrentValues.m_NameSpace + \".\" + Classes.ApplicationSettings.CurrentValues.m_ClassName ); } public void UloadAssembly() { //Unload the loaded appdomain AppDomain.Unload(DomainName); GC.Collect(); }