即使设置了值，打印范围也不起作用 [英] Print range not working even if values are set

问题描述

我设置了一个简单的打印解决方案，并且正常打印可以正常工作(测试了几次)，但是当我使用PrintDialog指定自定义页面范围时，就好像该范围已过.调试时，我检查printDocument对象并确认范围值正确，但是打印机产生的最终产品与我给它的值相差不大.

I have a simple printing solution set up and normal printing works fine(tested it a couple of times), however when I use the PrintDialog to specify a custom page range, it is as if the range is ingored. When I debug I inspect the printDocument object and confirm that the range values are correct but the end product that the printer produces does not much the values I gave it.

这是我的代码:

            printDialog.Document = printdoc;
            printDialog.AllowSomePages = true;

            if (printDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                printdoc.PrinterSettings.FromPage = printDialog.PrinterSettings.FromPage;
                printdoc.PrinterSettings.ToPage = printDialog.PrinterSettings.ToPage;
                printdoc.PrinterSettings.PrintRange = printDialog.PrinterSettings.PrintRange;

                printPreviewDialog.Document = printdoc;
                printPreviewDialog.FindForm().WindowState = FormWindowState.Maximized;
                printPreviewDialog.ShowDialog();
            }

*注意-printdoc是System.Drawing.Printing.PrintDocument的实例.我在PrintDocument的PrintPage事件处理程序中添加了代码，以填充我正在打印的页面.

*Note - printdoc is a instance of System.Drawing.Printing.PrintDocument. I added code in the PrintDocument's PrintPage event handler to populate the page I'm printing.

推荐答案

您需要告诉打印对话框它应该接受用户输入的页面范围.为此，您可以指定 PrinterSettings.PrintRange .

You need to tell the print dialog that it should accept user input for page ranges. To do this, you can specify the PrinterSettings.PrintRange.

var printDialog = new PrintDialog();
printDialog.AllowSomePages = true; //May not be needed
printDialog.PrinterSettings.PrintRange = PrintRange.SomePages; //Needed
if(printDialog.ShowDialog() == DialogResult.OK)
{
    // ... do the rest here
}

注意:您应该得到的主要建议是，需要设置PrintDialog.AllowSomePages = true(以及From/ToPage)，以便告诉对话框仅打印这些范围.另外，我不确定在对话框关闭后设置AllowSomePages是否会生效，所以这就是为什么我将代码放在ShowDialog之前的原因.您可以尝试在方便时在if语句中设置它.

Notes: The main takeaway you should get is that you need to set PrintDialog.AllowSomePages = true (along with From/ToPage) in order to tell the dialog to only print those ranges. Also, I am not sure if setting the AllowSomePages after the dialog closes will take effect, so that's why I put the code before ShowDialog. You can try to set it inside the if-statement at your convenience.

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