The following article provides a programmatic approach to printing data within a .NET WinForms Datagrid.

Sometimes all you need to do is print a simple report you are already showing on a monitor screen. Learn how to do this using DataGridPrint class in the .NET Framework. You can do this easily in .NET without overheat of a third-party vendors reporting package.

The sample code for this article is available at http://www.skaterpro.net/DataGridColumnsTrial.zip
You will also need learn more about the DataGridColumns .NET assembly and download its trial version that is available for download from http://www.rustemsoft.com/DataGridColumns.htm

To print data within the Datagrid object that is settled down onto your .NET Windows Form, a custom code using the DataGridPrint class is used.
The service class is intended to help you to create a print output based on your datagrid content. The class has been included into DataGridColumns .NET assembly since it is built for .NET WinForms datagrid control and very helpful for your .NET datagrid design. It will help you to implement an application with a print preview and a print support.
DataGrid object does not contain the table data within itself. The data is located within the DataSet that is bound to the DataGrid. So the DataGridPrint class object captures all color, layout, and font properties from the DataGrid for the print out. Also it captures the information in the rows from the datasource DataSet. The DataGridPrint class takes DataGrid, PrintDocument, and DataTable objects handed over to its constructor and utilizes these objects to represent the DataGrid as a printer output.
The DataGridPrint class is used by the Print dialog and Print Preview dialog on your .NET form to draw the DataGrid object content that should be printed.

DataGridPrint(PrintDocument1, DataGrid1, bBlackWhite)

PrintDocument1 - System.Drawing.Printing.PrintDocument reusable object that sends output to a printer
DataGrid1 - System.Windows.Forms.DataGrid object that content you are going to print
bBlackWhite - boolean parameter that defines if you like to use "Black and White" printing mode or you would like to send to printer the real coloring that your datagrid control has currently on your form.

Printing datagrid content is provided directly by the application logic in the .NET Framework. You add a PrintDocument object to the project and handle the PrintPage event which is called every time a new page is to be printed. An object of the DataGridPrint class that renders the printed page using GDI+ graphics functions in the PrintPage event handler is used for a .NET PrintDocument object.
A print job is initiated by the PrintDocument's Print method. This starts the print job and raises one or more events. When the print job begins, a BeginPrint event occurs, followed by the PrintPage event for each page, followed by the EndPage event when the job is done. If the print job contains multiple pages, one PrintPage event will be raised for each page in the job making the PrintPage event to execute multiple times. The PrintPage event is the main event involved in printing documents. To send content to the printer you must handle this event and provide code to render the content in the PrintPage event handler.



In the above example when the Print button is clicked the custom frmPrint print dialog form will be open. The frmPrint form contains several dialog checkboxes and buttons. By using this custom Print setting form you can manage your datagrid printing output. You may define if the datagrids header title will be printed or not by assigning DataGridPrint class objects PrintTitle variable. Another Title property helps you to define the caption text on your datagrid print output. By using the Print setting form you can perform the following actions:
1. Call Print dialog and send datagrid print output directly to a printer device. The Print dialog box lets you select options for a particular print job. For example, you can specify the printer to use, the range of pages to print, and the number of copies.
2. Call Print Preview dialog. From this dialog, you can preview on the screen how each printed page of your .NET datagrid will appear, and select page layout, orientation, and the range of pages to print.
3. Call Page Setup dialog. The Page Setup dialog box lets you set the following attributes of the printed .NET datagrid page:
-The paper type (envelope, legal, letter, and so on)
-The paper source (manual feed, tractor feed, sheet feeder, and so on)
-The page orientation (portrait or landscape)
-The width of the page margins

The following example creates a DataGridPrint object and prints the Datagrid.

Private PrintGrid As DataGridPrint
Private Sub btnPrint_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnPrint.Click
Dim fpr As New frmPrint()
With fpr
.Title = DataGrid1.CaptionText
.ShowDialog()
If .Result > 0 Then
PrintGrid = New DataGridPrint(PrintDocument1, DataGrid1, .bBlackWhite)
PrintGrid.PrintTitle = .bTitle
PrintGrid.Title = .Title
Select Case .Result
Case 1 ' Print
' The Print method prints the datagrid without using a print dialog.
' Use a PrintDialog when you want to offer the user the ability to choose print settings.
If PrintDialog1.ShowDialog() = DialogResult.OK Then PrintDocument1.Print()
Case 2 ' Page Setup
PageSetupDialog1.ShowDialog()
Case 3 ' Preview
PrintPreviewDialog1.Icon = fpr.Icon
PrintPreviewDialog1.ShowDialog()
End Select
End If
End With
End Sub

' Specify the output to print by handling the PrintPage event
' and by using the Graphics included in the PrintPageEventArgs.
Private Sub printDocument1_PrintPage(ByVal sender As Object, ByVal e As PrintPageEventArgs) Handles PrintDocument1.PrintPage
' Print method of DataGridPrint class starts the custom datagrid's printing process.
e.HasMorePages = PrintGrid.Print(e.Graphics)
End Sub

private DataGridPrint PrintGrid;
private void btnPrint_Click(object sender, System.EventArgs e)
{
frmPrint fpr = new frmPrint();
fpr.Title = DataGrid1.CaptionText;
fpr.ShowDialog();
if (fpr.Result > 0)
{
PrintGrid = new DataGridPrint(printDocument1, DataGrid1, fpr.bBlackWhite);
PrintGrid.PrintTitle = fpr.bTitle;
PrintGrid.Title = fpr.Title;
if (fpr.Result == 1) // Print
{
if (printDialog1.ShowDialog() == DialogResult.OK)
{
// The Print method prints the datagrid without using a print dialog.
// Use a PrintDialog when you want to offer the user the ability to choose print settings.
printDocument1.Print();
}
}
else if (fpr.Result == 2) // Page setup
{
pageSetupDialog1.ShowDialog();
}
else if (fpr.Result == 3) // Preview
{
printPreviewDialog1.Icon = fpr.Icon;
printPreviewDialog1.ShowDialog();
}
}
}

// Specify the output to print by handling the PrintPage event
// and by using the Graphics included in the PrintPageEventArgs.
private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
{
// Print method of DataGridPrint class starts the custom datagrid's printing process.
e.HasMorePages = PrintGrid.Print(e.Graphics);
}