如何在c＃中的PrintPreview控件中显示多个页面＃

Question

在我的Windows应用程序中，我在PrintPriview控件中打印了多个项目，但当项目大于25时，它不会打印下一页来打印其余项目。我知道我们需要使用e.Hasmorepages = true，但我无法弄清楚如何正确使用它。请帮忙。

屏幕截图 - Click here to see screen shot

private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e) 
    { 
     Bitmap bmp = Properties.Resources.logo2; 
     Image image = bmp; 
     e.Graphics.DrawImage(image, 0, 0, image.Width, image.Height); 

     e.Graphics.DrawString("Date: " + DateTime.Now.ToShortDateString(), new Font("Arial", 12, FontStyle.Regular), Brushes.Black, new Point(25, 160)); 
     e.Graphics.DrawString("Client Name: " + ClientNameTextBox.Text.Trim(), new Font("Arial", 12, FontStyle.Regular), Brushes.Black, new Point(25, 190)); 

     e.Graphics.DrawString("------------------------------------------------------------------------------------------------------------------------------------", new Font("Arial", 12, FontStyle.Regular), Brushes.Black, new Point(25, 235)); 
     e.Graphics.DrawString("Item Name", new Font("Arial", 12, FontStyle.Bold), Brushes.Black, new Point(30, 255)); 
     e.Graphics.DrawString("Quantity", new Font("Arial", 12, FontStyle.Bold), Brushes.Black, new Point(380, 255)); 
     e.Graphics.DrawString("Unit Price (£)", new Font("Arial", 12, FontStyle.Bold), Brushes.Black, new Point(510, 255)); 
     e.Graphics.DrawString("Total Price (£)", new Font("Arial", 12, FontStyle.Bold), Brushes.Black, new Point(660, 255)); 
     e.Graphics.DrawString("------------------------------------------------------------------------------------------------------------------------------------", new Font("Arial", 12, FontStyle.Regular), Brushes.Black, new Point(25, 270)); 

     int yPos = 295; 

     foreach (var i in shoppingCart) 
     { 
      e.Graphics.DrawString(i.ItemName, new Font("Arial", 12, FontStyle.Regular), Brushes.Black, new Point(30, yPos)); 
      e.Graphics.DrawString(i.Quantity.ToString(), new Font("Arial", 12, FontStyle.Regular), Brushes.Black, new Point(400, yPos)); 
      e.Graphics.DrawString(i.UnitPrice.ToString(), new Font("Arial", 12, FontStyle.Regular), Brushes.Black, new Point(550, yPos)); 
      e.Graphics.DrawString(i.TotalPrice.ToString(), new Font("Arial", 12, FontStyle.Regular), Brushes.Black, new Point(700, yPos)); 
      yPos += 30; 

     } 

     e.Graphics.DrawString("------------------------------------------------------------------------------------------------------------------------------------", new Font("Arial", 12, FontStyle.Regular), Brushes.Black, new Point(25, yPos)); 

     e.Graphics.DrawString("Total Amount:  £" + TotalAmountTextBox.Text.Trim(), new Font("Arial", 12, FontStyle.Regular), Brushes.Black, new Point(550, yPos + 30)); 
     e.Graphics.DrawString("Sales Tax (16%): £" + SalesTaxTextBox.Text.Trim(), new Font("Arial", 12, FontStyle.Regular), Brushes.Black, new Point(550, yPos + 60)); 
     e.Graphics.DrawString("Total To Pay:  £" + TotalToPayTextBox.Text.Trim(), new Font("Arial", 12, FontStyle.Regular), Brushes.Black, new Point(550, yPos + 90)); 

     e.Graphics.DrawString("------------------------------------------------------------------------------------------------------------------------------------", new Font("Arial", 12, FontStyle.Regular), Brushes.Black, new Point(25, yPos + 120)); 

    } 

在此先感谢。

问候，

Answer 1

是的，你需要

一）观看y值

二）设置HasMorePages为真时，它是在最大页面高度值

C） 离开打印页面事件。

如果需要，它会再次调用，即当您打印或预览下页..

您还需要跟踪您在类级别的变量已打印车项目;用for循环代替foreach循环存储/使用该项目编号！在y大于适合页面的最大值的情况下，跳出循环，然后再从return开始！

同样设计用于重复标题，但你有正确的想法！最后，另一个班级变量应该跟踪页码！