PrintDocument出现空白

Question

我有这个方法，它应该生成我需要打印的内容：

    private void myPrintDocument_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
    {

        e.Graphics.PageUnit = GraphicsUnit.Inch;
        e.Graphics.DrawImage(makeBarcode(), 500, 1000);
        e.Graphics.DrawString("Do Not Seperate", makeFont(), Brushes.Black, 100, 2);
        e.Graphics.DrawString("Choking Hazard", makeFont(), Brushes.Black, 200, 2);
    }

无论如何，当我打印它时，它会出现空白，而当我在PrintPreviewDialog中查看它时，它会出现空白。我在这里错过了什么？

顺便说一下，这是我的构造函数：

    public Form1()
    {
        InitializeComponent();
        this.myPrintDocument.PrintPage += new
            System.Drawing.Printing.PrintPageEventHandler
            (this.myPrintDocument_PrintPage);
    }

对于Mark

    private Image makeBarcode()
    {
        InventoryBLL ibll = new InventoryBLL();
        Barcode b = new Barcode();
        b.IncludeLabel = true;
        b.Height = 35;
        b.Width = 200;
        b.BackColor = Color.White;
        b.ForeColor = Color.Black;
        b.Alignment = BarcodeLib.AlignmentPositions.CENTER;
        return b.Encode(TYPE.CODE128, ibll.getFNSKU(txtASIN.Text));

    }
    private Font makeFont()
    {
        Font myFont = new Font("arial", 10);
        return myFont;
    }

Answer 1

   e.Graphics.PageUnit = GraphicsUnit.Inch;
   ...
   e.Graphics.DrawString("Choking Hazard", ..., 200, 2);

该字符串将以200英寸的速度打印。假设你的论文不是很大，8英寸是典型的。你看不到报纸上有什么。考虑更改PageUnit或使用小得多的浮点打印位置。