C++/CLI 函数调用缺少参数列表；用于创建指向成员的指针

Question

我正在使用 C++/CLI。我需要将 void 作为函数参数传递。函数参数是一个委托 void

我收到以下错误 error C3867: 'ChartTestApplication::UIMain::ChartCursorSelected': 函数调用缺少参数列表；使用 '&ChartTestApplication::UIMain::ChartCursorSelected' 创建一个指向 member

的指针

这里是 class 我定义函数的地方

namespace charting 
{

public delegate void CursorPositionChanged(double x, double y);

public ref class ChartTest sealed abstract
{
static void MyFunc(Chart ^sender, CursorPositionChanged ^selectionChanged, CursorPositionChanged ^cursorMoved)
{
   // Some code here
}

}

}

这是另一个 class 我想调用 MyFunc 函数的地方

void UIMain::ChartCursorSelected(double x, double y)
    {
        txtChartSelect->Text = x.ToString("F4") + ", " + y.ToString("F4");
    }

    void UIMain::ChartCursorMoved(double x, double y)
    {
        txtChartValue->Text = x.ToString("F4") + ", " + y.ToString("F4");
    }

    System::Void UIMain::UIMain_Shown(System::Object^  sender, System::EventArgs^  e)
    {
        ChartTest ::MyFunc(this->mainChart, this->ChartCursorSelected, this->ChartCursorMoved);
    }

请帮忙。

Answer 1

这是一个代码示例。正如 Hans Passant 建议的那样，您可能需要阅读 this article 关于 C++/CLI 中的委托。

namespace charting 
{
    public delegate void CursorPositionChanged(double x, double y);

    public ref class ChartTest sealed abstract
    {
    public:
        static void MyFunc(ref class Chart ^sender, CursorPositionChanged^, CursorPositionChanged^) { }
    };

    public ref class Chart { };

    public ref class UIMain
    {
    public:
        UIMain()
            : mainChart(gcnew Chart) { }

        void ChartCursorSelected(double x, double y) { }

        void ChartCursorMoved(double x, double y) { }

        System::Void UIMain_Shown(System::Object^ sender, System::EventArgs^ e)
        {
            ChartTest::MyFunc(
                this->mainChart,
                gcnew CursorPositionChanged(this, &UIMain::ChartCursorSelected),
                gcnew CursorPositionChanged(this, &UIMain::ChartCursorMoved)
                );
        }

        Chart^ mainChart;
    };
}

C++/CLI 函数调用缺少参数列表；用于创建指向成员的指针

C++/CLI function call missing argument list; use to create a pointer to member

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delegates

c++-cli

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