无限循环 PrintDocument HasmorePages c#

Question

我在多页打印信息时遇到问题，目前它会导致无限循环，我有几个小时在网上冲浪以寻求解决方案，但不清楚。

static void printDocument1_PrintPage(object sender, PrintPageEventArgs e)
{
    Graphics graphic = e.Graphics;
    SolidBrush brush = new SolidBrush(Color.Black);

    Font font = new Font("Courier New", 12);

    e.PageSettings.PaperSize = new PaperSize("A4", 850, 1100);

    float pageWidth = e.PageSettings.PrintableArea.Width;
    float pageHeight = e.PageSettings.PrintableArea.Height;

    float fontHeight = font.GetHeight();
    int startX = 40;
    int startY = 30;
    int offsetY = 0;

    for (int i = 0; i < 100; i++)
    {
        graphic.DrawString("Line: " + i, font, brush, startX, startY + offsetY);
        offsetY += (int)fontHeight;

        if (offsetY >= pageHeight)
        {
            e.HasMorePages = true;
            offsetY = 0;
            return;
        }
        else
        {
            e.HasMorePages = false;
        }
    }
}

有什么想法吗？ 谢谢

Answer 1

好吧，我想，我知道你想要什么了。我想你想打印 100 行。

对于您的情况，您应该有一个实例字段来保持打印行数。

试试这样的：

var printedLines = 0;
var linesToPrint = 100;

...

private void printDocument1_PrintPage(object sender, PrintPageEventArgs e)
{
    e.HasMorePages = false;

    ....


    while(printedLines < linesToPrint)
    {
         graphic.DrawString("Line: " + printedLines, font, brush, startX, startY + offsetY);
         offsetY += (int)fontHeight;

         ++printedLines;

         if (offsetY >= pageHeight)
         {
              e.HasMorePages = true;
              offsetY = 0;
              return;
         }
    }
}