C# PrintDialog与PrintPreviewDialog打印预览报告-优快云博客

该文章介绍了如何在C#中利用PrintDialog和PrintPreviewDialog控件进行打印预览功能的实现。代码示例展示了如何设置自定义纸张大小，调整打印比例，并在BeginPrint和PrintPage事件中处理图像绘制，确保高质量的打印效果。

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报告界面：(界面引入PrintDialog、PrintPreviewDialog、PrintDocument控件)

打印预览按钮代码

private void btnPrintPreview_Click(object sender, EventArgs e)
        {
            PaperSize ps = new PaperSize("Custom Size 1", panel1.Width, panel1.Height+50);
            //将缺省的纸张设置为新建的自定义纸张
            printDocument1.DefaultPageSettings.PaperSize = ps;
            printPreviewDialog1.Document = printDocument1;
            try
            {
                printPreviewDialog1.Width = Screen.PrimaryScreen.Bounds.Width;
                printPreviewDialog1.Height = Screen.PrimaryScreen.Bounds.Height;
                printPreviewDialog1.ShowDialog();
            }
            catch (Exception ex)
            {
            }
        }

打印按钮代码：

private void btnPrint_Click_1(object sender, EventArgs e)
        {
            btnPrintPreview.Enabled = false;
            btnPrint.Enabled = false;

            this.printDialog1.Document = this.printDocument1;
            if (this.printDialog1.ShowDialog() == DialogResult.OK)
            {
                try
                {
                    this.printDocument1.Print();
                }
                catch (Exception ex)
                {
                }
            }
            btnPrintPreview.Enabled = true;
            btnPrint.Enabled = true;
        }

PrintDocument控件，BeginPrint事件以及PrintPage事件

private int iPrintStatus;
private void printDocument1_BeginPrint(object sender, PrintEventArgs e)
        {
            if (e.PrintAction == PrintAction.PrintToPreview)  //打印预览
                iPrintStatus = 1;
            else if (e.PrintAction == PrintAction.PrintToPrinter)//打印机直接打印
                iPrintStatus = 2;
            else if (e.PrintAction == PrintAction.PrintToFile)//打印到文件
                iPrintStatus = 3;
        }

 private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
        {
            using (Bitmap _NewBitmap = new Bitmap(panel1.Width, panel1.Height))
            {
                _NewBitmap.SetResolution(1980, 1024); //分辨率
                panel1.DrawToBitmap(_NewBitmap, new Rectangle(0, 0, _NewBitmap.Width, _NewBitmap.Height));
                e.Graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
                e.Graphics.SmoothingMode = SmoothingMode.HighQuality;
                e.Graphics.CompositingQuality = CompositingQuality.HighQuality;
                e.Graphics.TextRenderingHint = TextRenderingHint.AntiAlias;
                if (iPrintStatus == 2)
                    e.Graphics.PageScale = 0.667f;  //1   打印到纸上的缩放比例
                e.Graphics.DrawImage(_NewBitmap, 0, 0, _NewBitmap.Width, _NewBitmap.Height);
            }
        }

5.打印预览效果(打印预览效果，就是打印到A4纸的效果)：