我在C ++ / CLI中有2个ref类:
>第一堂课:
public ref class wBlobFilter
{
int mMin;
int mMax;
bool mIsActive;
public:
// min value
property int Min
{
int get() {return mMin;}
void set(int value) {mMin = value;}
}
// max value
property int Max
{
int get(){return mMax;}
void set(int value){mMax = value;}
}
// set to true to active
property bool IsActive
{
bool get() {return mIsActive;}
void set(bool value){mIsActive = value;}
}
};
>第二节课:
public ref class wBlobParams
{
wBlobFilter mFilter;
public:
property wBlobFilter Filter
{
wBlobFilter get() {return mFilter;}
void set(wBlobFilter value) { mFilter = value; }
}
};
当我在C#中调用它时,我收到一条错误消息:"无法修改返回值,因为它不是变量"
Params.Filter.Min = 0;
那么,如何通过类wBlobParams属性直接设置类wBlobFilter的成员变量的值?对不起,我的英语不好。谢谢!!!
答案 0 :(得分:0)
很难知道你想要发生什么。如果它继承,那么过滤器的属性将可用。
public ref class wBlobParams : public wBlobFilter
{};
void f(wBlobParams^ params) {
auto max = params->Max;
}
或者在wBlobParams中复制属性访问:
public ref class wBlobParams {
public:
wBlobFilter^ mFilter;
property int Max {
int get() { return mFilter->Max; }
}
};
void f(wBlobParams^ params) {
auto max = params->Max;
}
编辑1:
看这个。你做的很好。只是你使用gc句柄的语法是错误的。
public ref class cA {
int x;
public:
cA() : x(0) {}
property int X {
int get() { return x; }
void set(int _x) { x = _x; }
}
};
public ref class cB {
cA^ a;
public:
cB() : a(gcnew cA()) {}
property cA^ A {
cA^ get() { return a; }
void set(cA^ _a) { a = _a; }
}
};
void main() {
cB^ b = gcnew cB();
b->A->X = 5;
Console::WriteLine(b->A->X);
}