从.NET服务打印

using System.Drawing.Printing;
using System.IO;
using System.Windows.Forms;

private void PrintText()
{
    // 创建一个PrintDocument对象
    PrintDocument printDoc = new PrintDocument();

    // 添加打印事件处理程序
    printDoc.PrintPage += new PrintPageEventHandler(printDoc_PrintPage);

    // 设置打印机名称
    printDoc.PrinterSettings.PrinterName = "Your Printer Name";

    // 打印文档
    printDoc.Print();
}

private void printDoc_PrintPage(object sender, PrintPageEventArgs e)
{
    // 创建字体对象
    Font font = new Font("Arial", 12);

    // 创建Brush对象
    Brush brush = new SolidBrush(Color.Black);

    // 计算文本宽度和高度
    int textWidth = (int)e.Graphics.MeasureString("Hello, World!", font).Width;
    int textHeight = (int)e.Graphics.MeasureString("Hello, World!", font).Height;

    // 计算文本位置
    int xPosition = (e.PageBounds.Width / 2) - (textWidth / 2);
    int yPosition = (e.PageBounds.Height / 2) - (textHeight / 2);

    // 在页面上绘制文本
    e.Graphics.DrawString("Hello, World!", font, brush, xPosition, yPosition);

    // 指示打印完成
    e.HasMorePages = false;
}