将枚举值传递给动态对象调用的方法
我正在开发动态（在运行时）加载 dll 的程序。
例如：Microsoft.AnalysisServices.dll。
在这个 dll 中，我们有这个枚举：
namespace Microsoft.AnalysisServices
{
[Flags]
public enum UpdateOptions
{
Default = 0,
ExpandFull = 1,
AlterDependents = 2,
}
}
并且我们还有这个类 Cube：
namespace Microsoft.AnalysisServices
{
public sealed class Cube : ...
{
public Cube(string name);
public Cube(string name, string id);
..
..
..
}
}
我动态加载这个 dll 并创建对象Cube。然后我调用了一个方法Cube.Update()。此方法将Cube部署到SQL分析服务器。但如果我想打电话 此方法带有参数 Cube.Update(UpdateOptions.ExpandFull) 我收到错误，因为方法没有获取适当的参数。
我已经尝试过这个，但不起作用：
dynamic updateOptions = AssemblyLoader.LoadStaticAssembly("Microsoft.AnalysisServices", "Microsoft.AnalysisServices.UpdateOptions");//my class for loading assembly
Array s = Enum.GetNames(updateOptions);
dynamic myEnumValue = s.GetValue(1);//1 = ExpandFull
dynamicCube.Update(myEnumValue);// == Cube.Update(UpdateOptions.ExpandFull)
我知道参数 myEnumValue 中存在错误，但我不知道如何从程序集中动态获取枚举类型并将其传递给方法。有人知道解决办法吗？
非常感谢您的解答和帮助！
I'm working on program which dynamically(in runtime) loads dlls.
For an example: Microsoft.AnalysisServices.dll.
In this dll we have this enum:
namespace Microsoft.AnalysisServices
{
[Flags]
public enum UpdateOptions
{
Default = 0,
ExpandFull = 1,
AlterDependents = 2,
}
}
and we also have this class Cube:
namespace Microsoft.AnalysisServices
{
public sealed class Cube : ...
{
public Cube(string name);
public Cube(string name, string id);
..
..
..
}
}
I dynamically load this dll and create object Cube. Than i call a method Cube.Update(). This method deploy Cube to SQL Analysis server. But if i want to call
this method with parameters Cube.Update(UpdateOptions.ExpandFull) i get error, because method doesn't get appropriate parameter.
I have already tried this, but doesn't work:
dynamic updateOptions = AssemblyLoader.LoadStaticAssembly("Microsoft.AnalysisServices", "Microsoft.AnalysisServices.UpdateOptions");//my class for loading assembly
Array s = Enum.GetNames(updateOptions);
dynamic myEnumValue = s.GetValue(1);//1 = ExpandFull
dynamicCube.Update(myEnumValue);// == Cube.Update(UpdateOptions.ExpandFull)
I know that error is in parameter myEnumValue but i don't know how to get dynamically enum type from assembly and pass it to the method. Does anybody know the solution?
Thank you very much for answers and help!
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评论（2）
所有枚举都可以像其基本类型一样对待。在本例中，UpdateOptions 的基本类型是 int，因此您可以简单地将值 1 传递到dynamicCube.Update 中，如下所示：
您无需担心动态枚举类型位。
All enums can be treated the same as their base type. In this case, the base type of UpdateOptions is int so you can simply pass thevalue 1 into dynamicCube.Update like this:
You don't need to bother with the dynamic enum type bits.
我找到了解决方案。代码如下：
动态程序集 = AssemblyLoader.LoadStaticAssembly("Microsoft.AnalysisServices", Microsoft.AnalysisServices.UpdateOptions");动态expandFull = (Enum)Enum.Parse(程序集, "ExpandFull", true);
dynamicCub.Update(expandFull);
并且它有效！
问候，
I found the solution. The code is like this:
dynamic assembly = AssemblyLoader.LoadStaticAssembly("Microsoft.AnalysisServices", Microsoft.AnalysisServices.UpdateOptions");dynamic expandFull = (Enum)Enum.Parse(assembly, "ExpandFull", true);
dynamicCub.Update(expandFull);
and it works!
Regards,