Silverlight 和 Windows Phone 7 是否支持模块初始值设定项? [英] Are Module initializers supported in Silverlight and Windows Phone 7?

问题描述

如果你愿意操作 IL .net 支持模块初始化器

If you are willing to manipulate IL .net supports Module Initializers

http://blogs.msdn.com/b/junfeng/archive/2005/11/19/494914.aspx

http://tech.einaregilsson.com/2009/12/16/module-initializers-in-csharp/

Silverlight 和 Windows Phone 7 是否支持模块初始值设定项?

Are Module initializers supported in Silverlight and Windows Phone 7?

推荐答案

只有 C++/CLI 支持模块初始值设定项.这只是间接的，它使用它们来启动 CRT 并初始化非托管变量和对象.你必须写在IL.我试过了，它在 Silverlight 4 上工作得很好:

Only C++/CLI supports a module initializer. And that's only indirectly, it uses them to get the CRT started and to get unmanaged variables and objects initialized. You have to write on in IL. I tried, it worked just fine on Silverlight 4:

.assembly extern mscorlib
{
  .publickeytoken = (7C EC 85 D7 BE A7 79 8E )
  .ver 2:0:5:0
}

.assembly test
{
  .custom instance void [mscorlib]System.Runtime.CompilerServices.RuntimeCompatibilityAttribute::.ctor() = ( 01 00 01 00 54 02 16 57 72 61 70 4E 6F 6E 45 78
                                                                                                               63 65 70 74 69 6F 6E 54 68 72 6F 77 73 01 )
  .custom instance void [mscorlib]System.Runtime.Versioning.TargetFrameworkAttribute::.ctor(string) = ( 01 00 18 53 69 6C 76 65 72 6C 69 67 68 74 2C 56
                                                                                                        65 72 73 69 6F 6E 3D 76 34 2E 30 01 00 54 0E 14
                                                                                                        46 72 61 6D 65 77 6F 72 6B 44 69 73 70 6C 61 79
                                                                                                        4E 61 6D 65 0D 53 69 6C 76 65 72 6C 69 67 68 74
                                                                                                        20 34 )                                    
  .hash algorithm 0x00008004
  .ver 1:0:0:0
}

.method assembly specialname rtspecialname static void .cctor() cil managed
{
  ldc.i4.s   42
  stsfld     int32 Example.Class1::test
  ret
}

.class public auto ansi beforefieldinit Example.Class1
       extends [mscorlib]System.Object
{
  .field public static int32 test
  .method public hidebysig specialname rtspecialname 
          instance void  .ctor() cil managed
  {
    .maxstack 8
    ldarg.0
    call       instance void [mscorlib]System.Object::.ctor()
    ret
  }
}

这是一个愚蠢的例子，模块初始值设定项设置了 Class1 的静态字段.然后，我在示例 Silverlight 应用程序中创建了 Class1 的实例，并使用调试器验证了该值.

Its a silly example, the module initializer sets a static field of Class1. I then created an instance of Class1 in a sample Silverlight app and verified the value with the debugger.

这个完全相同的代码在 Windows Phone 模拟器中不能工作.我应该修改了 TargetFrameworkAttribute，实际上并没有尝试这个.我怀疑这是问题的根源.

This exact same code did not work in the Windows Phone emulator. I should have modified the TargetFrameworkAttribute, did not actually try this. I doubt that it is the source of the problem.

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