c# - 在 WinForms 中打印图形

Question

我有一个创建返回 a 的类Graphics。我想以我的主要形式打印此图形。HoweverSystem.Drawing.Printing.PrintPageEventArg.Graphics是只读的。Graphics如何在无法设置的情况下打印我的System.Drawing.Printing.PrintPageEventArg.Graphics

    public Graphics makeLabel()
    {

        Graphics label = Graphics.FromImage(makeBitMap());
        label.PageUnit = GraphicsUnit.Inch;
        label.DrawImage(Barcode,1, 200);
        label.DrawString("Do Not Seperate", makeFont(), Brushes.Black, 100, 2);
        label.DrawString("Choking Hazard", makeFont(), Brushes.Black, 200, 2);
        return label;

    }