C＃使用＆＃39;这个＆＃39;课堂上的关键字

Question

我有一个从两点创建LineShape的代码。

class MyMenu
{
    public static void AddLine()
    {

        ShapeContainer canvas = new ShapeContainer();
        LineShape theLine = new LineShape();

        canvas.Parent = this;

        theLine.Parent = canvas;
        theLine.BorderColor = SystemColors.ControlDarkDark;

        theLine.StartPoint = new System.Drawing.Point(-3, 154);
        theLine.EndPoint = new System.Drawing.Point(212, 154);

    }
}

。我想创建一个类，并从那里使用，但我最终有一个错误。

Keyword 'this' is not valid in a static property, static method, or static field initializer    

我试着像这样修理它，但没有！

 Form1 MyForm = new Form1();
        canvas.Parent = MyForm;

谢谢！

Answer 1

我不确定，您可以尝试将表单引用传递给方法（如果这是您的意思）。

class MyMenu
{
    public static void AddLine(Form f)
    {

        ShapeContainer canvas = new ShapeContainer();
        LineShape theLine = new LineShape();

        canvas.Parent = f;

        theLine.Parent = canvas;
        theLine.BorderColor = SystemColors.ControlDarkDark;

        theLine.StartPoint = new System.Drawing.Point(-3, 154);
        theLine.EndPoint = new System.Drawing.Point(212, 154);

    }
}

从表格：

MyMenu.AddLine(this);