printDocument的时候预览显示不全

this.printDocument1.DefaultPageSettings.PaperSize = new PaperSize("Custum", 105, 60);//自定义纸张大小为105*60
printDocument1.DefaultPageSettings.Margins = new Margins(0, 0, 0, 0);//边距

    private void printDocument1_PrintPage(System.Object sender, System.Drawing.Printing.PrintPageEventArgs e)
    {
       
        ////打印内容 为 局部的 this.groupBox1
        Bitmap _NewBitmap = new Bitmap(groupBox1.Width, groupBox1.Height);
        groupBox1.DrawToBitmap(_NewBitmap, new Rectangle(0, 0, _NewBitmap.Width, _NewBitmap.Height));
        e.Graphics.DrawImage(_NewBitmap, 0, 0, 105, 60);
      }

应该怎么解决呢？

你好,
你可以自定义页面大小大一点2*200:

PrintDocument pd = new PrintDocument();
pd.DefaultPageSettings.PaperSize = pd.PrinterSettings.PaperSizes(200,200);