为什么C＃将我的颜色结构更改为ValueType？ [英] Why C# change my color structure to ValueType?

问题描述

我在C ++ CLI中定义了以下代码。

然而，当我想调用SetColor时，第一个参数应该显示为System.Drawing.Color;显示为ValueType。

这也让我将任何变量传递给它。无论是 Color 还是不是。

I have defined following code in C++ CLI.
However when I want to call SetColor the first parameter which is supposed to appear as System.Drawing.Color; appears as ValueType.
This also let me to pass any variable into it. No matter if it's Color or not.

[System::Runtime::CompilerServices::ExtensionAttribute]
public ref class MyExtensions abstract sealed {
public:        
    [System::Runtime::CompilerServices::ExtensionAttribute]
    static System::String^ SetColor(System::String^ in, System::Drawing::Color^ ext) {
        return gcnew System::String("{") +
            ext->R.ToString("X") + ext->G.ToString("X") + ext->B.ToString("X")
            + gcnew System::String("}")  + in;
    }        
};

推荐答案

Color是一个结构体。从参数 System :: Drawing :: Color ^ ext 中删除​​ ^ 。

Color is a struct. Remove the ^ from the parameter System::Drawing::Color^ ext.

此外， gcnew System :: String（{）是多余的。直接使用{，它已经是一个String对象。

Also, gcnew System::String("{") is redundant. Just use "{" directly, it's already a String object.

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