Question

我有3种打印方法：printa，printb和printc（每种打印一种形式）。所有3个表单都需要跨多个页面打印。如何在3页上打印？

我知道我们需要使用事件处理程序并使用currentpage和e.hasmorepages但我不确定如何使用它。

Answer 1

只需跟踪页码即可。您在BeginPrint事件中将其设置为0，并在每次调用PrintPage时将其递增。像这样：

    int pageNumber;

    private void printDocument1_BeginPrint(object sender, System.Drawing.Printing.PrintEventArgs e) {
        pageNumber = 0;
    }

    private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e) {
        ++pageNumber;
        e.HasMorePages = true;
        switch (pageNumber) {
            case 1: printa(e); break;
            case 2: printb(e); break;
            case 3: printc(e); e.HasMorePages = false; break;
        }
    }

Answer 2

是的，它可能非常模糊。以下是我为printing Reporting Services报告（下面的代码中的MetaFile图像数组）所做的操作。

public void Print()
{
    if (emfImage == null || emfImage.Count <= 0)
    {
        throw new ArgumentException("An image is required to print.");
    }

    printer = printer.Trim();
    if (string.IsNullOrEmpty(printer))
    {
        throw new ArgumentException("A printer is required.");
    }

    printingPage = 0;
    PrintDocument pd = new PrintDocument();
    pd.PrinterSettings.PrinterName = printer;
    pd.PrintPage += new PrintPageEventHandler(pd_PrintPage);
    pd.Print();
}

private void pd_PrintPage(object sender, PrintPageEventArgs e)
{
    Metafile page = emfImage[printingPage];
    e.Graphics.DrawImage(page, 0, 0, page.Width, page.Height);

    e.HasMorePages = ++printingPage < emfImage.Count;
}

在多个页面上打印表单

2 个答案: