how to print only the checked rows from a datagridview in c#

Question

I have a Datagridview it has a checkboxcolumn! when the data is loaded for standard all rows get checked! but i need to uncheck some of them and them, send it\'s values to a var

Answer 1

Print all checked rows in a page:

private void printDocument1_PrintPage(object sender, PrintPageEventArgs e)
{
    //Find all checked rows
    var allCheckedRows = this.myDataGridView.Rows.Cast()
                                .Where(row => (bool?)row.Cells[0].Value == true)
                                .ToList();

    //create a stringBuilder that will contain the string for all checked rows
    var builder = new StringBuilder();

    //For each checked row, create string presentation of row and add to output stringBuilder
    allCheckedRows.ForEach(row =>
    {
        //Create an array of all cell value of a row to then concatenate them using a separator
        var cellValues = row.Cells.Cast()
            .Where(cell => cell.ColumnIndex > 0)
            .Select(cell => string.Format("{0}", cell.Value))
            .ToArray();

        //Then joiconcatenate values using ", " as separator, and added to output
        builder.AppendLine(string.Join(", ", cellValues));
        //Here instead of adding them to the stringBuilder, you can add int to another list.      
    });

    //Print the output string
    e.Graphics.DrawString(builder.ToString(),
                this.myDataGridView.Font,
                new SolidBrush(this.myDataGridView.ForeColor),
                new RectangleF(0, 0, this.printDocument1.DefaultPageSettings.PrintableArea.Width, this.printDocument1.DefaultPageSettings.PrintableArea.Height));
}

Output:

1251000014, portraitx, U$ 125.00
1251000021, notebooky, U$ 899.96
1251444251, iphoness, U$ 566.26

Print each checked row in a separate page:

private int currentPrintingRowIndex = 0;

private void printDocument1_PrintPage(object sender, PrintPageEventArgs e)
{
    var allCheckedRows = this.myDataGridView.Rows.Cast()
                                .Where(row => (bool?)row.Cells[0].Value == true)
                                .ToList();

    if (allCheckedRows.Count > currentPrintingRowIndex)
    {
        var builder = new StringBuilder();
        var currentCheckedRow = allCheckedRows[currentPrintingRowIndex];

        var cellValues = currentCheckedRow.Cells.Cast()
                .Where(cell => cell.ColumnIndex > 0)
                .Select(cell => string.Format("{0}", cell.Value))
                .ToArray();

        builder.AppendLine(string.Join(", ", cellValues));

        e.Graphics.DrawString(builder.ToString(),
                    this.myDataGridView.Font,
                    new SolidBrush(this.myDataGridView.ForeColor),
                    new RectangleF(0, 0, this.printDocument1.DefaultPageSettings.PrintableArea.Width, this.printDocument1.DefaultPageSettings.PrintableArea.Height));

        currentPrintingRowIndex += 1;
        e.HasMorePages = allCheckedRows.Count > currentPrintingRowIndex;
    }
}

Output:

A document with 3 pages:

Page1 content: 1251000014, portraitx, U$ 125.00
Page2 content: 1251000021, notebooky, U$ 899.96
Page3 content: 1251444251, iphoness, U$ 566.26