.NET Compact Framework 对 .NET 框架类中的内部方法的反射调用

发布于 2024-12-06 14:46:59 字数 500 浏览 0 评论 0原文

我正在尝试从 .NET 2.0 CF 应用程序加载 .NET 程序集。我想调用具有三个参数的内部方法，如下所示：

var obj = new System.Web.Security.SqlMembershipProvider();

MethodInfo mi = obj.GetType().GetMethod("GenerateSalt", 
                    BindingFlags.NonPublic | BindingFlags.Instance,
                    null, new Type[] {}, null);

object resObj = mi.Invoke(obj, new object[] {});

当执行 GetMethod 调用时，会引发 InvalidProgramException。我可以从常规 .NET 2.0 控制台应用程序测试工具进行此调用，但在 .NET 2.0 CF 中它会抛出异常。

到底是怎么回事？

原文

I am trying to load a .NET assembly from a .NET 2.0 CF application. I want to invoke an internal method with three params like so:

var obj = new System.Web.Security.SqlMembershipProvider();

MethodInfo mi = obj.GetType().GetMethod("GenerateSalt", 
                    BindingFlags.NonPublic | BindingFlags.Instance,
                    null, new Type[] {}, null);

object resObj = mi.Invoke(obj, new object[] {});

When the GetMethod call is executed, a InvalidProgramException is thrown. I can make this call from a regular .NET 2.0 console app test harness, but in .NET 2.0 CF it throws.

What is going on?

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回眸一笑 2024-12-13 14:46:59

您无法从 Compact Framework 项目引用包含 SqlMembershipProvider 的程序集 (System.Web.dll)。据我所知，这种类型在 Compact Framework 中不可用。

您可能会收到异常，因为您正在加载的程序集包含 Compact Framework 运行时无法理解的 IL。

然而，自己重写GenerateSalt所做的事情相当简单，并且紧凑的框架应该具备使其工作所需的一切：

public string GenerateSalt()
{
    byte[] data = new byte[0x10];
    new System.Security.Cryptography.RNGCryptoServiceProvider().GetBytes(data);
    return System.Convert.ToBase64String(data);
}

根本不需要使用SqlMembershipProvider（或反射）。

You cannot reference the assembly (System.Web.dll) that contains SqlMembershipProvider from a Compact Framework project. As far as I can tell, this type is not available in the Compact Framework.

You are likely getting the exception because you are loading an assembly that contains IL that the Compact Framework Runtime cannot understand.

However, it is fairly simple to re-write what GenerateSalt does yourself, and the compact framework should have everything needed to make it work:

public string GenerateSalt()
{
    byte[] data = new byte[0x10];
    new System.Security.Cryptography.RNGCryptoServiceProvider().GetBytes(data);
    return System.Convert.ToBase64String(data);
}

No need to use the SqlMembershipProvider (or reflection) at all.

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