Print data grid view skips the first row

Question

I have created a print preview for the data grid view that I want to print. The code works fine but there is slight problem

Problem Screenshot:

In the data grid view row, the ID 1 is missing, it always starts from 2. How can I solve this problem? Please help.

My code:

 Private Sub PrintDocument1_PrintPage(sender As System.Object, e As System.Drawing.Printing.PrintPageEventArgs) Handles PrintDocument1.PrintPage

    Dim mRow As Integer = 0
    Dim newpage As Boolean = True
    PrintDocument1.DefaultPageSettings.Landscape = True

    With DataGridView1
        Dim fmt As StringFormat = New StringFormat(StringFormatFlags.LineLimit)
        fmt.LineAlignment = StringAlignment.Center
        fmt.Trimming = StringTrimming.EllipsisCharacter
        Dim y As Single = e.MarginBounds.Top
        Do While mRow < .RowCount
            Dim row As DataGridViewRow = .Rows(mRow)
            Dim x As Single = e.MarginBounds.Left
            Dim h As Single = 0
            For Each cell As DataGridViewCell In row.Cells

                Dim rc As RectangleF = New RectangleF(x, y, cell.Size.Width, cell.Size.Height)
                e.Graphics.DrawRectangle(Pens.Black, rc.Left, rc.Top, rc.Width, rc.Height)
                If (newpage) Then
                    e.Graphics.DrawString(DataGridView1.Columns(cell.ColumnIndex).HeaderText, .Font, Brushes.Black, rc, fmt)
                Else
                    e.Graphics.DrawString(DataGridView1.Rows(cell.RowIndex).Cells(cell.ColumnIndex).FormattedValue.ToString(), .Font, Brushes.Black, rc, fmt)
                End If
                x += rc.Width
                h = Math.Max(h, rc.Height)
            Next
            newpage = False
            y += h
            mRow += 1
            If y + h > e.MarginBounds.Bottom Then
                e.HasMorePages = True
                mRow -= 1
                newpage = True
                Exit Sub
            End If
        Loop
        mRow = 0
    End With
End Sub

Answer 1

rows(0) is the first data row, not header row, while cell.RowIndex is 1, so change rows(cell.RowIndex) as rows(cell.RowIndex-1) :

e.Graphics.DrawString(DataGridView1.Rows(cell.RowIndex - 1).Cells(cell.ColumnIndex).FormattedValue.ToString(), .Font, Brushes.Black, rc, fmt) 

Answer 2

Print each part separately to avoid this kind of problems. The headers part belongs to the Columns collection then print it first before you handle the Rows and Cells parts.

You have another problem in your code to fix. The mRow is a local variable that does not preserve the last printed row to skip or the new row to continue with when you request a new page. It must be a class field.

Private mRow As Integer

Private Sub PrintPreviewButton(sender As Object, e As EventArgs) _
    Handles Button1.Click
    PrintDocument1.DefaultPageSettings.Landscape = True
    mRow = 0

    Using d = New PrintPreviewDialog With {
        .Document = PrintDocument1
    }
        d.ShowDialog(Me)
    End Using
End Sub

Private Sub PrintDocument1_PrintPage(sender As Object, e As PrintPageEventArgs) _
    Handles PrintDocument1.PrintPage
    Dim g = e.Graphics
    Dim x As Integer = e.MarginBounds.X
    Dim y As Integer = e.MarginBounds.Y

    With DataGridView1
        Using sf = New StringFormat(StringFormat.GenericTypographic) With {
        .LineAlignment = StringAlignment.Center,
        .Trimming = StringTrimming.EllipsisCharacter
        }
            For Each col As DataGridViewColumn In .Columns
                Dim rect = New Rectangle(
                    x, y,
                    col.Width, col.DataGridView.ColumnHeadersHeight)

                g.DrawRectangle(Pens.Black, rect)
                rect.Inflate(-3, 0)
                g.DrawString(col.HeaderText, .Font, Brushes.Black, rect, sf)

                x += col.Width
            Next

            y += .ColumnHeadersHeight

            For i = mRow To .RowCount - 1
                Dim row = .Rows(i)

                If row.IsNewRow Then Exit Sub

                x = e.MarginBounds.X

                For Each cell As DataGridViewCell In row.Cells
                    Dim rect = New Rectangle(New Point(x, y), cell.Size)

                    g.DrawRectangle(Pens.Black, rect)
                    rect.Inflate(-3, 0)
                    g.DrawString(cell.FormattedValue?.ToString(),
                                    .Font, Brushes.Black, rect, sf)

                    x += cell.Size.Width
                Next cell

                y += row.Height

                If y + row.Height > e.MarginBounds.Bottom Then
                    mRow = i + 1
                    e.HasMorePages = True
                    Exit For
                End If
            Next i
        End Using
    End With
End Sub

Answer 3

The If (newpage) causes it to draw the headers instead of the first row.

You could change the section

newpage = False
y += h
mRow += 1

to

If not newpage Then
    mRow += 1
End If
newpage = False
y += h