Question

我尝试的方式是生成两个重叠的图像。

我可以制作两个不同的按钮来打印两个单独的bmp，但是我需要将两个bmp打印在同一页面上，因为用户可以选择PDF打印机并生成一个两页的文件。

void Imprimir()
{
    PrintDocument pd = new PrintDocument();
    pd.DocumentName = "Relatório SisIndice";
    pd.PrintPage += new PrintPageEventHandler(doc_PrintPage);
    pd.DefaultPageSettings.Landscape = true;
    PrintDialog printDialog1 = new PrintDialog();
    printDialog1.Document = pd;
    DialogResult result = printDialog1.ShowDialog();
    if (result == DialogResult.OK)
    {    
        pd.Print();
    }
}

private void doc_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
{
    Bitmap bmp = new Bitmap(pnlPrint.Width, pnlPrint.Height, pnlPrint.CreateGraphics());
    pnlPrint.DrawToBitmap(bmp, new Rectangle(0, 0, pnlPrint.Width, pnlPrint.Height));
    RectangleF bounds = e.PageSettings.PrintableArea;
    float factor = ((float)bmp.Height / (float)bmp.Width);
    e.Graphics.DrawImage(bmp, bounds.Left, bounds.Top, 1118, 855);
    e.HasMorePages = true;
    Bitmap bmp1 = new Bitmap(dgvDetGraf.Width, dgvDetGraf.Height, dgvDetGraf.CreateGraphics());
    dgvDetGraf.DrawToBitmap(bmp1, new Rectangle(0, 1800, dgvDetGraf.Width, dgvDetGraf.Height));
    RectangleF bounds1 = e.PageSettings.PrintableArea;
    e.Graphics.DrawImage(bmp1, bounds1.Left, bounds1.Top, 894, 684);
    e.HasMorePages = false;

}

Answer 1

您已关闭，但您错过了PrintPage事件会针对单个页面触发。在那种情况下，你必须在其Graphics对象上进行所有绘画/绘图。如果没有其他页面，则将HasMorePages设置为false。

因此，如果您在第1页或第2页上并且基于该绘制您在该页面上所需的位图，则不必一次性绘制所有这些位图。

我选择了最简单的解决方案，该解决方案可能会涉及page变量，以跟踪我们所依赖的网页。

int page = 0; 

void Imprimir()
{
    // snip irrelevant stuf
    if (result == DialogResult.OK)
    {   
        // reset our state to page 1
        page = 1;
        pd.Print();
    }
}

private void doc_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
{
    // this gets called twice, the page variable
    // keeps track of what to do (it keeps the State)
    switch(page)
    {
        // do this for page 1
        case 1:
            Bitmap bmp = new Bitmap(pnlPrint.Width, pnlPrint.Height, pnlPrint.CreateGraphics());
            pnlPrint.DrawToBitmap(bmp, new Rectangle(0, 0, pnlPrint.Width, pnlPrint.Height));
            RectangleF bounds = e.PageSettings.PrintableArea;
            float factor = ((float)bmp.Height / (float)bmp.Width);
            e.Graphics.DrawImage(bmp, bounds.Left, bounds.Top, 1118, 855);
            e.HasMorePages = true;
            break;
        // do this for page 2
        case 2:
            Bitmap bmp1 = new Bitmap(dgvDetGraf.Width, dgvDetGraf.Height, dgvDetGraf.CreateGraphics());
            dgvDetGraf.DrawToBitmap(bmp1, new Rectangle(0, 1800, dgvDetGraf.Width, dgvDetGraf.Height));
            RectangleF bounds1 = e.PageSettings.PrintableArea;
            e.Graphics.DrawImage(bmp1, bounds1.Left, bounds1.Top, 894, 684);
            e.HasMorePages = false;
            break;
    }
    // don't forget to go the next state ... 
    page++; // increase page counter
}

如何将两个bmp打印成两个不同的页面？

1 个答案: