如何使用 C# 中的绘制字符串将所有行值打印到文档

Question

I have tried this code, but it showing outofrange exception, how can I resolve it, pls help

try
{
    for (int i = 0; i < Convert.ToInt32(OrderGV.Rows.Count)-1; i++)
    {
       graphics.DrawString(OrderGV.SelectedRows[i].Cells[1].Value.ToString() + "\t" + OrderGV.SelectedRows[i].Cells[2].Value.ToString(), new Font("Century", 14, FontStyle.Bold), Brushes.Black, new Point(startx, starty+200));
    }
}
catch (Exception)
{
   throw;
}

***Here OrderGV is a Datagridview.

Answer 1

You are looping over all data rows, but your drawing function only uses selected rows which causes an error if not all rows are selected. So the problem is, the Rows array in your loop is bigger than the SelectedRows array. I think the following should work.

try
{
    for (int i = 0; i < Convert.ToInt32(OrderGV.Rows.Count)-1; i++)
    {
       graphics.DrawString(OrderGV.Rows[i].Cells[1].Value.ToString() + "\t" + OrderGV.Rows[i].Cells[2].Value.ToString(), new Font("Century", 14, FontStyle.Bold), Brushes.Black, new Point(startx, starty+200));
    }
}
catch (Exception)
{
   throw;
}

Or the other way around if you only want the selected rows

try
{
    for (int i = 0; i < Convert.ToInt32(OrderGV.SelectedRows.Count)-1; i++)
    {
       graphics.DrawString(OrderGV.SelectedRows[i].Cells[1].Value.ToString() + "\t" + OrderGV.SelectedRows[i].Cells[2].Value.ToString(), new Font("Century", 14, FontStyle.Bold), Brushes.Black, new Point(startx, starty+200));
    }
}
catch (Exception)
{
   throw;
}