36

在 C# 中，我正在尝试使用带有以下代码的 PrintDocument 类打印图像。图像大小为 1200 像素宽和 1800 像素高。我正在尝试使用小型斑马打印机在 4*6 纸上打印此图像。但是程序只打印 4*6 的大图像。这意味着它没有将图像调整为纸张尺寸！

     PrintDocument pd = new PrintDocument();
     pd.PrintPage += (sender, args) =>
     {
           Image i = Image.FromFile("C://tesimage.PNG");
           Point p = new Point(100, 100);
           args.Graphics.DrawImage(i, 10, 10, i.Width, i.Height);
     };
     pd.Print();

当我使用 Window Print 打印相同的图像时（右键单击并选择打印，它会自动缩放到纸张尺寸并正确打印。这意味着一切都在 4*6 纸上。）我如何在我的 C# 程序中做同样的事情？

4

7 回答 7

39

您传递给 DrawImage 方法的参数应该是您希望图像在纸上的大小，而不是图像本身的大小，然后 DrawImage 命令将为您处理缩放。可能最简单的方法是使用 DrawImage 命令的以下覆盖。

args.Graphics.DrawImage(i, args.MarginBounds);

注意：如果图像的比例与矩形不同，这将使图像倾斜。一些关于图像大小和纸张大小的简单数学运算将允许您创建一个适合纸张边界的新矩形，而不会扭曲图像。

于 2012-04-02T22:30:47.793 回答
31

不要践踏 BBoy 已经不错的答案，但我已经完成了保持纵横比的代码。我接受了他的建议，所以他应该在这里获得部分荣誉！

PrintDocument pd = new PrintDocument();
pd.DefaultPageSettings.PrinterSettings.PrinterName = "Printer Name";
pd.DefaultPageSettings.Landscape = true; //or false!
pd.PrintPage += (sender, args) =>
{
    Image i = Image.FromFile(@"C:\...\...\image.jpg");
    Rectangle m = args.MarginBounds;

    if ((double)i.Width / (double)i.Height > (double)m.Width / (double)m.Height) // image is wider
    {
        m.Height = (int)((double)i.Height / (double)i.Width * (double)m.Width);
    }
    else
    {
        m.Width = (int)((double)i.Width / (double)i.Height * (double)m.Height);
    }
    args.Graphics.DrawImage(i, m);
};
pd.Print();
于 2013-10-10T21:01:52.133 回答
10

BBoy 提供的解决方案运行良好。但就我而言，我不得不使用

e.Graphics.DrawImage(memoryImage, e.PageBounds);

这将只打印表格。当我使用 MarginBounds 时，即使表单小于监视器屏幕，它也会打印整个屏幕。PageBounds 解决了这个问题。感谢BBoy！

于 2015-06-30T15:12:33.427 回答
4

你可以在这里使用我的代码

//Print Button Event Handeler
private void btnPrint_Click(object sender, EventArgs e)
{
    PrintDocument pd = new PrintDocument();
    pd.PrintPage += PrintPage;
    //here to select the printer attached to user PC
    PrintDialog printDialog1 = new PrintDialog();
    printDialog1.Document = pd;
    DialogResult result = printDialog1.ShowDialog();
    if (result == DialogResult.OK)
    {
        pd.Print();//this will trigger the Print Event handeler PrintPage
    }
}

//The Print Event handeler
private void PrintPage(object o, PrintPageEventArgs e)
{
    try
    {
        if (File.Exists(this.ImagePath))
        {
            //Load the image from the file
            System.Drawing.Image img = System.Drawing.Image.FromFile(@"C:\myimage.jpg");

            //Adjust the size of the image to the page to print the full image without loosing any part of it
            Rectangle m = e.MarginBounds;

            if ((double)img.Width / (double)img.Height > (double)m.Width / (double)m.Height) // image is wider
            {
                m.Height = (int)((double)img.Height / (double)img.Width * (double)m.Width);
            }
            else
            {
                m.Width = (int)((double)img.Width / (double)img.Height * (double)m.Height);
            }
            e.Graphics.DrawImage(img, m);
        }
    }
    catch (Exception)
    {

    }
}
于 2014-06-28T00:58:01.747 回答
4

回答：

public void Print(string FileName)
{
    StringBuilder logMessage = new StringBuilder();
    logMessage.AppendLine(string.Format(CultureInfo.InvariantCulture, "-------------------[ START - {0} - {1} -------------------]", MethodBase.GetCurrentMethod(), DateTime.Now.ToShortDateString()));
    logMessage.AppendLine(string.Format(CultureInfo.InvariantCulture, "Parameter: 1: [Name - {0}, Value - {1}", "None]", Convert.ToString("")));

    try
    {
        if (string.IsNullOrWhiteSpace(FileName)) return; // Prevents execution of below statements if filename is not selected.

        PrintDocument pd = new PrintDocument();

        //Disable the printing document pop-up dialog shown during printing.
        PrintController printController = new StandardPrintController();
        pd.PrintController = printController;

        //For testing only: Hardcoded set paper size to particular paper.
        //pd.PrinterSettings.DefaultPageSettings.PaperSize = new PaperSize("Custom 6x4", 720, 478);
        //pd.DefaultPageSettings.PaperSize = new PaperSize("Custom 6x4", 720, 478);

        pd.DefaultPageSettings.Margins = new Margins(0, 0, 0, 0);
        pd.PrinterSettings.DefaultPageSettings.Margins = new Margins(0, 0, 0, 0);

        pd.PrintPage += (sndr, args) =>
        {
            System.Drawing.Image i = System.Drawing.Image.FromFile(FileName);

            //Adjust the size of the image to the page to print the full image without loosing any part of the image.
            System.Drawing.Rectangle m = args.MarginBounds;

            //Logic below maintains Aspect Ratio.
            if ((double)i.Width / (double)i.Height > (double)m.Width / (double)m.Height) // image is wider
            {
                m.Height = (int)((double)i.Height / (double)i.Width * (double)m.Width);
            }
            else
            {
                m.Width = (int)((double)i.Width / (double)i.Height * (double)m.Height);
            }
            //Calculating optimal orientation.
            pd.DefaultPageSettings.Landscape = m.Width > m.Height;
            //Putting image in center of page.
            m.Y = (int)((((System.Drawing.Printing.PrintDocument)(sndr)).DefaultPageSettings.PaperSize.Height - m.Height) / 2);
            m.X = (int)((((System.Drawing.Printing.PrintDocument)(sndr)).DefaultPageSettings.PaperSize.Width - m.Width) / 2);
            args.Graphics.DrawImage(i, m);
        };
        pd.Print();
    }
    catch (Exception ex)
    {
        log.ErrorFormat("Error : {0}\n By : {1}-{2}", ex.ToString(), this.GetType(), MethodBase.GetCurrentMethod().Name);
    }
    finally
    {
        logMessage.AppendLine(string.Format(CultureInfo.InvariantCulture, "-------------------[ END  - {0} - {1} -------------------]", MethodBase.GetCurrentMethod().Name, DateTime.Now.ToShortDateString()));
        log.Info(logMessage.ToString());
    }
}
于 2015-03-09T12:49:41.940 回答
4

同意 TonyM 和 BBoy - 这是原始 4*6 打印标签的正确答案。(args.PageBounds)。这对我打印 Endicia API 服务运输标签很有用。

private void SubmitResponseToPrinter(ILabelRequestResponse response)
    {
        PrintDocument pd = new PrintDocument();
        pd.PrintPage += (sender, args) =>
        {
            Image i = Image.FromFile(response.Labels[0].FullPathFileName.Trim());
            args.Graphics.DrawImage(i, args.PageBounds);
        };
        pd.Print();
    }
于 2016-11-03T16:32:05.010 回答
0

所有这些答案都有问题，总是将图像拉伸到页面大小并在尝试此操作时切断一些内容。
找到了一个更简单的方法。

我自己的解决方案仅拉伸（这是正确的词吗？）如果图像太大，可以使用多个副本和页面方向。

                PrintDialog dlg = new PrintDialog();

            if (dlg.ShowDialog() == true)
            {
                BitmapImage bmi = new BitmapImage(new Uri(strPath));

                Image img = new Image();
                img.Source = bmi;

                if (bmi.PixelWidth < dlg.PrintableAreaWidth ||
                           bmi.PixelHeight < dlg.PrintableAreaHeight)
                {
                    img.Stretch = Stretch.None;
                    img.Width = bmi.PixelWidth;
                    img.Height = bmi.PixelHeight;
                }


                if (dlg.PrintTicket.PageBorderless == PageBorderless.Borderless)
                {
                    img.Margin = new Thickness(0);
                }
                else
                {
                    img.Margin = new Thickness(48);
                }
                img.VerticalAlignment = VerticalAlignment.Top;
                img.HorizontalAlignment = HorizontalAlignment.Left;

                for (int i = 0; i < dlg.PrintTicket.CopyCount; i++)
                {
                    dlg.PrintVisual(img, "Print a Image");
                }
            }
于 2020-08-12T21:07:41.767 回答