所以，我正在尝试打印datagridview数据，但问题是在页面高度超过限制后，它不会移动到下一页打印剩余数据。我尝试通过计算项目来添加条件但没有成功。请告诉我我的代码有什么问题。如果我添加项目号的条件。页面不断增加，但所有页面都有相同的数据。
private void printDocument1_PrintPage(object sender,
System.Drawing.Printing.PrintPageEventArgs e)
{
Image image = Resources.grocery;
float pageWidth = e.PageSettings.PrintableArea.Width;
float pageHeight = e.PageSettings.PrintableArea.Height;
Font font = new Font("Arial", 12, FontStyle.Regular);
float fontHeight = font.GetHeight();
int startX = 40;
int startY = 30;
int offsetY = 30;
e.Graphics.DrawImage(image, 0, 0, 250, 250);
e.Graphics.DrawString("Invoice ID : GO-" + saaale, font, Brushes.Black, new Point(570, offsetY));
offsetY += (int)fontHeight;
e.Graphics.DrawString("Invoice Date :" + theDate, font, Brushes.Black, new Point(570, offsetY+40));
offsetY += (int)fontHeight;
e.Graphics.DrawString("Due Date : " + a, font, Brushes.Black, new Point(570, offsetY+80));
offsetY += (int)fontHeight;
e.Graphics.DrawString("Client Name: " + this.comboBox1.GetItemText(this.comboBox1.SelectedItem), font, Brushes.Black, new Point(570, offsetY + 120));
offsetY += (int)fontHeight;
e.Graphics.DrawString("----------------------------------------------------------------------------------------------------------------------------------------------------------------------------", new Font("Arial", 12, FontStyle.Bold), Brushes.Black, new Point(0, 290));
offsetY += (int)fontHeight;
e.Graphics.DrawString("S.No", font, Brushes.Black, new Point(10, offsetY + 280));
offsetY += (int)fontHeight;
e.Graphics.DrawString("Product Name", font, Brushes.Black, new Point(130, offsetY + 280));
offsetY += (int)fontHeight;
e.Graphics.DrawString("Quantity", font, Brushes.Black, new Point(440, offsetY + 280));
offsetY += (int)fontHeight;
e.Graphics.DrawString("Sale Price", font, Brushes.Black, new Point(580, offsetY + 280));
offsetY += (int)fontHeight;
e.Graphics.DrawString("Amount", font, Brushes.Black, new Point(750, offsetY + 280));
offsetY += (int)fontHeight;
e.Graphics.DrawString("----------------------------------------------------------------------------------------------------------------------------------------------------------------------------", new Font("Arial", 12, FontStyle.Bold), Brushes.Black, new Point(0, 330));
offsetY += (int)fontHeight;
int j = 340; //370
int count111 = 0;
for (int i = 0; i < dataGridView1.RowCount - 1; i++)
{
if (offsetY >= pageHeight)
{
e.HasMorePages = true;
offsetY = 0;
return;
}
else
{
e.Graphics.DrawString(dataGridView1.Rows[i].Cells[0].Value.ToString(), font, Brushes.Black, new Point(10, offsetY + j));
offsetY += (int)fontHeight;
e.Graphics.DrawString(dataGridView1.Rows[i].Cells[1].Value.ToString(), font, Brushes.Black, new Point(140, offsetY + j));
offsetY += (int)fontHeight;
e.Graphics.DrawString(dataGridView1.Rows[i].Cells[2].Value.ToString(), font, Brushes.Black, new Point(450, offsetY + j));
offsetY += (int)fontHeight;
e.Graphics.DrawString(dataGridView1.Rows[i].Cells[3].Value.ToString(), font, Brushes.Black, new Point(590, offsetY + j));
offsetY += (int)fontHeight;
e.Graphics.DrawString(dataGridView1.Rows[i].Cells[4].Value.ToString(), font, Brushes.Black, new Point(760, offsetY + j));
j = j + 30;
//count111++;
e.HasMorePages = false;
}
}
e.Graphics.DrawString("----------------------------------------------------------------------------------------------------------------------------------------------------------------------------", new Font("Arial", 12, FontStyle.Bold), Brushes.Black, new Point(0, offsetY + j - offsetY));
offsetY += (int)fontHeight;
e.Graphics.DrawString("Total Amount : Rs " + sum, new Font("Arial", 12, FontStyle.Bold), Brushes.Black, new Point(550, offsetY + j + offsetY));
offsetY += (int)fontHeight;
// e.Graphics.DrawString("Thank You For Your Buisness ", new Font("Arial", 12, FontStyle.Bold), Brushes.DarkBlue, new Point(280, j + 400));
//multipage trial
//end
//Bitmap bm = new Bitmap(this.dataGridView1.Width, this.dataGridView1.Height);
//dataGridView1.DrawToBitmap(bm, new Rectangle(0, 0, this.dataGridView1.Width, this.dataGridView1.Height));
//e.Graphics.DrawImage(bm, 0, 350);
}
答案 0 :(得分：0)
不幸的是，我认为DataGridView不支持PrintDocument。因此，您必须自己管理网格循环。发布的代码似乎使事情变得更加复杂。主要问题是您正在检查网格行循环内的更多页面。这不起作用。
目前，PrintPage方法似乎是在网格中循环，但是，正如您在问题中所注意到的那样...它总是从每个页面的网格中的行的开始处开始。使用for循环i索引作为当前正在打印的网格行的索引将不会以这种方式工作。它肯定解释了为什么它总是从一开始就开始，但它也很可能永远不会结束，并且是一个无限循环。
因此，很明显您将不得不保留一个GLOBAL索引变量来保存当前行的行索引以进行打印。这样，每次输入PrintPage方法时，都可以使用此全局变量索引来跟踪要打印的当前行。
这表明需要满足两个（2）条件才能发出需要新页面的信号......即...您有更多行要打印并且您已到达打印页面的底部。
以下伪代码是帮助解决此问题的简单指南。
首先，创建一个全局变量来跟踪当前需要打印的行。拥有一个全局变量来跟踪当前（垂直）打印行位置相对于页面高度的位置可能是有益的。
int CurrentDGVRowIndex = 0;
currentPrint_Vertical_Value = 30;
然后在PrintPage方法中，我们可以使用这些变量来检查我们是否已经到达网格中打印行的末尾，此外，我们可以使用它们来查看是否有更多行打印，我们已到达页面底部。
private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e) {
float pageHeight = e.PageSettings.PrintableArea.Height;
currentPrint_Vertical_Value = 30;
PrintHeader(e);
// keep printing until either there are no more rows to print OR we reach the end of the page
while ((currentPrint_Vertical_Value < pageHeight) &&
(CurrentDGVRowIndex < dataGridView1.Rows.Count - 1)) {
// print a single row
e.Graphics.DrawString(dataGridView1.Rows[CurrentDGVRowIndex].Cells[0].Value.ToString(), font, Brushes.Black, new Point(10, currentPrint_Vertical_Value));
e.Graphics.DrawString(dataGridView1.Rows[CurrentDGVRowIndex].Cells[1].Value.ToString(), font, Brushes.Black, new Point(140, currentPrint_Vertical_Value));
e.Graphics.DrawString(dataGridView1.Rows[CurrentDGVRowIndex].Cells[2].Value.ToString(), font, Brushes.Black, new Point(450, currentPrint_Vertical_Value));
e.Graphics.DrawString(dataGridView1.Rows[CurrentDGVRowIndex].Cells[3].Value.ToString(), font, Brushes.Black, new Point(590, currentPrint_Vertical_Value));
e.Graphics.DrawString(dataGridView1.Rows[CurrentDGVRowIndex].Cells[4].Value.ToString(), font, Brushes.Black, new Point(760, currentPrint_Vertical_Value));
currentPrint_Vertical_Value = currentPrint_Vertical_Value + 30;
// increment to the next grid row
CurrentDGVRowIndex++;
}
一旦我们退出这个循环，我们知道一个（或两个）条件已经满足。
1）我们用完行打印
2）我们已到达页面底部。
鉴于此，我们只需检查是否需要打印更多页面。检查上一个打印行的行索引。如果它等于网格中的总行数，那么我们就完成了。如果没有，那么我们知道我们已到达可打印区域的末尾，需要再次调用PrintPage方法。
if (CurrentDGVRowIndex == dataGridView1.RowCount - 1) {
// no more rows in the grid to print – print summary and exit/
PrintFooter(e);
e.HasMorePages = false;
}
else {
// there are more rows to print therefore we have more pages
e.HasMorePages = true;
}
}
我希望这会有所帮助。