Question

有一个程序应该只写出论文中的页数假设计数= 50

但是当我编写代码时，它会迅速而且永远不会停止。

这是代码：

 private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
    {
        RectangleF yek1;
        while(count >= 0)
        {
           e.Graphics.DrawString("12345678901234567890", TitleFont, BlackBrush,yek,TitleStingFormat);

            yek1 = new Rectangle(10, 10, drawWidth, drawHeight);

            e.Graphics.DrawString(count.toString(), TitleFont, BlackBrush, yek1, TitleStingFormat);

            count --;
            e.HasMorePages = true;

        }
            e.HasMorePages = false;
}

谢谢，如果有人可以帮助我。

我改变了上面的代码。但它只是打印＆＃34; 50＆＃34;这是反击的第一个值。

 private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
    {


        // Page Size
        int pageWidth = 830;
        int pageHeight = 1170;

        int BorderWidth, BorderHeight, BorderX, BorderY, drawHeight, drawWidth, drawY1, drawY2, drawX1, drawX2;
        Color BorderColor;
        float BorderLineWidth;

        Font TitleFont;
        Brush BlackBrush, whiteBrush;
        StringFormat TitleStingFormat = new StringFormat();




        // Border

        BorderWidth = pageWidth - 40;
        BorderHeight = pageHeight - 20;
        BorderX = 30;
        BorderY = 25;
        BorderColor = Color.Gray;
        BorderLineWidth = 2;

        drawHeight = 30;
        drawWidth = 400;
        drawY1 = 400;
        drawY2 = 985;
        drawX1 = 100;
        drawX2 = 513;
        int xc = 0;

        int counter = 10;

        TitleFont = textBox1.Font;
        BlackBrush = Brushes.Black;
        whiteBrush = Brushes.White;
        TitleStingFormat = new StringFormat();
        TitleStingFormat.Alignment = StringAlignment.Near;


        // draw border
        Pen BorderPen = new Pen(BorderColor, BorderLineWidth);
        Pen linePen = new Pen(BorderColor, 1);
        linePen.DashStyle = System.Drawing.Drawing2D.DashStyle.Dash;

        //Rectangles for clearing the paper
 /*       RectangleF one = new Rectangle(BorderX, BorderY, BorderWidth, drawY * 9 + 8);
        RectangleF two = new Rectangle(BorderX, BorderY + 270, BorderWidth, drawY * 9 + 8);
        RectangleF three = new Rectangle(BorderX, BorderY + 540, BorderWidth, drawY * 9 + 8);
        RectangleF four = new Rectangle(BorderX, BorderY + 810, BorderWidth, drawY * 9 + 5);


        RectangleF yek = new Rectangle(drawX1, drawY1, drawWidth, drawHeight);
        RectangleF dow = new Rectangle(drawX2, drawY1, drawWidth, drawHeight);
        RectangleF se = new Rectangle(drawX1, drawY2, drawWidth, drawHeight);
        RectangleF chehar = new Rectangle(drawX2, drawY2, drawWidth, drawHeight);
        */
        //Draw
        RectangleF yek1;
        RectangleF dow1;
        RectangleF se1;
        RectangleF chehar1;
        while(counter >= 0)
        {
       /*     e.Graphics.DrawString("12345678901234567890", TitleFont, BlackBrush, yek, TitleStingFormat);
            e.Graphics.DrawString("12345678901234567890", TitleFont, BlackBrush, dow, TitleStingFormat);
            e.Graphics.DrawString("12345678901234567890", TitleFont, BlackBrush, se, TitleStingFormat);
            e.Graphics.DrawString("12345678901234567890", TitleFont, BlackBrush, chehar, TitleStingFormat);
            */


            yek1 = new Rectangle(drawX1, 10 +(xc * 830), drawWidth, drawHeight);
        //    dow1 = new Rectangle(drawX2, drawY1+ (xc * 830), drawWidth, drawHeight);
        //    se1 = new Rectangle(drawX1, drawY2+(xc * 830), drawWidth, drawHeight);
        //    chehar1 = new Rectangle(drawX2, drawY2+(xc * 830), drawWidth, drawHeight);

            e.Graphics.DrawString(counter.ToString(), TitleFont, BlackBrush, yek1, TitleStingFormat);
        //    e.Graphics.DrawString("12345678901234567890", TitleFont, BlackBrush, dow1, TitleStingFormat);
        //    e.Graphics.DrawString("12345678901234567890", TitleFont, BlackBrush, se1, TitleStingFormat);
        //    e.Graphics.DrawString("12345678901234567890", TitleFont, BlackBrush, chehar1, TitleStingFormat);

        //    counter--;

            counter--;
            xc++;

            e.HasMorePages = true;
          //  MessageBox.Show(xc.ToString());

        }

        e.HasMorePages = false;
    }

Answer 1

你做错了。它正在发生的是打印50页，然后打破你的循环。在它退出循环后，e.HasMorePages仍设置为true。那么你的应用程序就像“哦！还有更多的页面。让我们打印那些”。所以它再次运行PrintPage事件，它会冲洗并重复。

在您突破e.HasMorePages循环后将false属性设置为while，它应该可以解决您的问题。

Answer 2

此代码看起来会在单个页面上编写循环的所有迭代，然后再次为下一页执行此操作。你可能想要取出循环：

private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
{
    RectangleF yek1;

    // Change "while" to "if" here
    if(count >= 0)
    {
       e.Graphics.DrawString("12345678901234567890", TitleFont, BlackBrush,yek,TitleStingFormat);

        yek1 = new Rectangle(drawX1, drawY1 + (xc * 830), drawWidth, drawHeight);

        e.Graphics.DrawString(xc.ToString(), TitleFont, BlackBrush, yek1, TitleStingFormat);

        count --;

        // Set HasMorePages depending on the value of count
        e.HasMorePages = (count >= 0);
        return;
    }

    // No more pages
    e.HasMorePages = false;
}

如何在c＃中打印一些页面

2 个答案: