//声明打印对象
PrintDocument pd = new PrintDocument();
int ilvPreviewIndex = 0; 

private void btnPrint_Click(object sender, EventArgs e)
{
    //获取和设置标签的高宽和边距
    decimal dLabelHeight = nudLabelHeight.Value;
    decimal dLabelWidth = nudLabelWidth.Value;
    decimal dTopMargin = nudTopMargin.Value;
    decimal dLeftMargin = nudLeftMargin.Value;
    //设置边距
    Margins margin = new Margins(0, 0, 0, 0);
    pd.DefaultPageSettings.Margins = margin;
    pd.DefaultPageSettings.Margins = margin;
    //横向打印
    //pd.DefaultPageSettings.Landscape = true;
    //循环打印
    for(; ilvPreviewIndex < dgvPreview.Rows.Count; ilvPreviewIndex++)
    {
        //页面尺寸
        pd.DefaultPageSettings.PaperSize = new PaperSize("Custom", Utility.GetPixelByWidth(dLabelWidth), Utility.GetPixelByWidth(dLabelHeight));
        pd.PrintPage += new PrintPageEventHandler(this.pd_PrintPage);
        pd.Print();
    }
}

/// <summary>
/// 打印事件处理
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void pd_PrintPage(object sender, PrintPageEventArgs e)
{
    //排架号中的行间距
    int iMiddle = int.Parse(Utility.ConfigGetItem("ShelfMiddle"));
    //获取和设置标签的高宽和边距
    decimal dLabelHeight = nudLabelHeight.Value;
    decimal dLabelWidth = nudLabelWidth.Value;
    decimal dTopMargin = nudTopMargin.Value;
    decimal dLeftMargin = nudLeftMargin.Value;
    //获取排架号
    string sBeginCallNo = dgvPreview.Rows[ilvPreviewIndex].Cells[0].Value.ToString();
    string sConnectSymbol = txtConnectSymbol.Text.Trim();
    string sEndCallNo = dgvPreview.Rows[ilvPreviewIndex].Cells[1].Value.ToString();
    //设置水平文字对齐方式
    StringFormat stringFormat = new StringFormat();
    stringFormat.LineAlignment = StringAlignment.Center;
    stringFormat.Alignment = StringAlignment.Center;
    //将排架号进行拼接打印
    Graphics g = e.Graphics;
    float leftMargin = Utility.GetPixelByWidth(dLeftMargin); //左边距
    SolidBrush myBrush = new SolidBrush(Color.Black); //刷子
    float yPosition = Utility.GetPixelByHeight(dTopMargin); //行定位
    Font printFont = new Font("宋体", 12 f, FontStyle.Bold); //设置字体
    g.DrawString(sBeginCallNo, printFont, myBrush, leftMargin, yPosition, stringFormat);
    yPosition += Utility.GetPixelByHeight(iMiddle); //另起一行
    g.DrawString(sConnectSymbol, printFont, myBrush, leftMargin, yPosition, stringFormat);
    yPosition += Utility.GetPixelByHeight(iMiddle); //另起一行
    g.DrawString(sEndCallNo, printFont, myBrush, leftMargin, yPosition, stringFormat);
}