先举个例子 Form里有10个DataGridview控件 每个只有一行数据,我想把这10个打印在一个页面上 怎么办? 我最先想到的是把这些数据合成一个table,但是合成table会耗费性能,而且 这10个表格的列数不一定相等
网上也找不到一页打印多个DataGridview的方法 做一就自己动手改写了一个 写出来后,我拿两个DataGridview测试,功能基本能实现 但是感觉写的代码很不专业 性能很差 希望大家帮忙优化一下 本帖纯技术讨论帖 禁水!谢谢!这是我调用这个类的代码private void button1_Click(object sender, EventArgs e)
{
DataGridView[] dgv = new DataGridView[2];
dgv[0] = dataGridView2;
dgv[1] = dataGridView1;
DataGridViewPrint dgvp = new DataGridViewPrint(dgv);
dgvp.Print();
}
这是功能类public class DataGridViewPrint
{
private DataGridView[] dataGridView;
private PrintDocument printDocument;
private PageSetupDialog pageSetupDialog;
private PrintPreviewDialog printPreviewDialog; private int dgvIndex=0; private int rowCount = 0;
private int colCount = 0;
private int x = 0;
private int y = 0;
private int i = 0;
private int j = 0;
private int rowGap = 20;
private int colGap = 5;
private int leftMargin = 50;
private Font font = new Font("Arial", 10);
private Font headingFont = new Font("Arial", 11, FontStyle.Underline);
private Font captionFont = new Font("Arial", 10, FontStyle.Bold);
private Brush brush = new SolidBrush(Color.Black);
private string cellValue = ""; public DataGridViewPrint(DataGridView[] dataGridView)
{
this.dataGridView = dataGridView;
printDocument = new PrintDocument();
printDocument.PrintPage += new PrintPageEventHandler(this.printDocument_PrintPage);
} private void printDocument_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
{
for (; dgvIndex < dataGridView.Length;dgvIndex++ )
{
rowCount = dataGridView[dgvIndex].Rows.Count - 1; colCount = dataGridView[dgvIndex].ColumnCount; //print headings
y += rowGap;
x = leftMargin;
for (j = 0; j < colCount; j++)
{
if (dataGridView[dgvIndex].Columns[j].Width > 0)
{
cellValue = dataGridView[dgvIndex].Columns[j].HeaderText;
e.Graphics.DrawString(cellValue, headingFont, brush, x, y);
x += dataGridView[dgvIndex].Columns[j].Width + colGap;
}
}
//print all rows
for (; i < rowCount; i++)
{
y += rowGap;
x = leftMargin;
for (j = 0; j < colCount; j++)
{
if (dataGridView[dgvIndex].Columns[j].Width > 0)
{
cellValue = dataGridView[dgvIndex].Rows[i].Cells[j].Value.ToString();
e.Graphics.DrawString(cellValue, font, brush, x, y);
x += dataGridView[dgvIndex].Columns[j].Width + colGap;
y = y + rowGap * (cellValue.Split(new char[] { ' ', ' ' }).Length - 1);
}
}
if (y >= e.PageBounds.Height - 50)
{
//允許多頁打印
y = rowGap;
e.HasMorePages = true;
i++; /*
* PrintPageEventArgs類的HaeMorePages屬性為True時,通知控件器,必須再次調用OnPrintPage()方法,打印一個頁面。
* PrintLoopI()有一個用於每個要打印的頁面的序例。如果HasMorePages是False,PrintLoop()就會停止。
*/
return;
}
}
}
e.HasMorePages = false;
}
public PrintDocument GetPrintDocument()
{
return printDocument;
} public void Print()
{
try
{
pageSetupDialog = new PageSetupDialog();
pageSetupDialog.Document = printDocument;
pageSetupDialog.ShowDialog();
printPreviewDialog = new PrintPreviewDialog();
printPreviewDialog.Document = printDocument;
printPreviewDialog.Height = 600;
printPreviewDialog.Width = 800;
printPreviewDialog.ShowDialog();
}
catch (Exception e)
{
throw new Exception("Printer error." + e.Message);
} }
}
网上也找不到一页打印多个DataGridview的方法 做一就自己动手改写了一个 写出来后,我拿两个DataGridview测试,功能基本能实现 但是感觉写的代码很不专业 性能很差 希望大家帮忙优化一下 本帖纯技术讨论帖 禁水!谢谢!这是我调用这个类的代码private void button1_Click(object sender, EventArgs e)
{
DataGridView[] dgv = new DataGridView[2];
dgv[0] = dataGridView2;
dgv[1] = dataGridView1;
DataGridViewPrint dgvp = new DataGridViewPrint(dgv);
dgvp.Print();
}
这是功能类public class DataGridViewPrint
{
private DataGridView[] dataGridView;
private PrintDocument printDocument;
private PageSetupDialog pageSetupDialog;
private PrintPreviewDialog printPreviewDialog; private int dgvIndex=0; private int rowCount = 0;
private int colCount = 0;
private int x = 0;
private int y = 0;
private int i = 0;
private int j = 0;
private int rowGap = 20;
private int colGap = 5;
private int leftMargin = 50;
private Font font = new Font("Arial", 10);
private Font headingFont = new Font("Arial", 11, FontStyle.Underline);
private Font captionFont = new Font("Arial", 10, FontStyle.Bold);
private Brush brush = new SolidBrush(Color.Black);
private string cellValue = ""; public DataGridViewPrint(DataGridView[] dataGridView)
{
this.dataGridView = dataGridView;
printDocument = new PrintDocument();
printDocument.PrintPage += new PrintPageEventHandler(this.printDocument_PrintPage);
} private void printDocument_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
{
for (; dgvIndex < dataGridView.Length;dgvIndex++ )
{
rowCount = dataGridView[dgvIndex].Rows.Count - 1; colCount = dataGridView[dgvIndex].ColumnCount; //print headings
y += rowGap;
x = leftMargin;
for (j = 0; j < colCount; j++)
{
if (dataGridView[dgvIndex].Columns[j].Width > 0)
{
cellValue = dataGridView[dgvIndex].Columns[j].HeaderText;
e.Graphics.DrawString(cellValue, headingFont, brush, x, y);
x += dataGridView[dgvIndex].Columns[j].Width + colGap;
}
}
//print all rows
for (; i < rowCount; i++)
{
y += rowGap;
x = leftMargin;
for (j = 0; j < colCount; j++)
{
if (dataGridView[dgvIndex].Columns[j].Width > 0)
{
cellValue = dataGridView[dgvIndex].Rows[i].Cells[j].Value.ToString();
e.Graphics.DrawString(cellValue, font, brush, x, y);
x += dataGridView[dgvIndex].Columns[j].Width + colGap;
y = y + rowGap * (cellValue.Split(new char[] { ' ', ' ' }).Length - 1);
}
}
if (y >= e.PageBounds.Height - 50)
{
//允許多頁打印
y = rowGap;
e.HasMorePages = true;
i++; /*
* PrintPageEventArgs類的HaeMorePages屬性為True時,通知控件器,必須再次調用OnPrintPage()方法,打印一個頁面。
* PrintLoopI()有一個用於每個要打印的頁面的序例。如果HasMorePages是False,PrintLoop()就會停止。
*/
return;
}
}
}
e.HasMorePages = false;
}
public PrintDocument GetPrintDocument()
{
return printDocument;
} public void Print()
{
try
{
pageSetupDialog = new PageSetupDialog();
pageSetupDialog.Document = printDocument;
pageSetupDialog.ShowDialog();
printPreviewDialog = new PrintPreviewDialog();
printPreviewDialog.Document = printDocument;
printPreviewDialog.Height = 600;
printPreviewDialog.Width = 800;
printPreviewDialog.ShowDialog();
}
catch (Exception e)
{
throw new Exception("Printer error." + e.Message);
} }
}
肯定影响性能的。
建议尽量少用类的成员,各个方法之间的数据传递用参数实现。
这样就可以变全局变量为局部变量了。
你的类的成员(全局变量)只有在对象被注销时释放空间。
而局部变量在方法执行完了就可以释放空间了。