在B/S架构下实现对位打印

现在我们实现打印类的基类

using System;
using System.Drawing;
using System.Drawing.Printing;

namespace WGSys.DataExchange
{
    public class PrinterBase
    {
        protected static readonly Font memFont = new Font("宋体", 9);        //普通字体
        protected static readonly Font memBarCodeFont=new Font("C39HrP24DhTt",36); //条形码字体

        protected PrintPageEventHandler memHandler;
        string memDocName = null;

        public PrinterBase()
        {
            memHandler = new PrintPageEventHandler(this.PageHandler);//表示将要处理 PrintDocument 的 PrintPage 事件的方法
        }

        public string DocName
        {
            get
            {
                return memDocName;
            }
            set
            {
                memDocName = value;
            }
        }

        public virtual void Print(PrintDocument tempPrnDoc,bool isPreview)
        {
                tempPrnDoc.PrintPage += memHandler;
                if ((memDocName!=null)&&(memDocName.Length>0))
                    tempPrnDoc.DocumentName = memDocName;//打印文档时要显示的文档名。默认情况下为“文档”
                if(isPreview)
                {
                    System.Windows.Forms.PrintPreviewDialog pd = new System.Windows.Forms.PrintPreviewDialog();
                    pd.Document = tempPrnDoc;
                    pd.ShowDialog();
                }
                else
                {
                    tempPrnDoc.Print();
                }
        }
        public virtual void OnPrintPage(PrintPageEventArgs ev)
        {
            ev.Graphics.DrawString(
                "Output",
                memFont,
                Brushes.Black,
                ev.MarginBounds.Left,
                ev.MarginBounds.Top,
                new StringFormat()
                );
            //=================
            
            ev.HasMorePages = false;
        }

        protected void PageHandler(object sender, PrintPageEventArgs ev)
        {
            OnPrintPage(ev);
        }
    }
}

打印所需的数据我们用一个数据类来表示，每个属性我们应用[XmlAttribute]特性，为此我们可是使用XML的序列化和反序列化以便把数据转换成XML格式通过WEB SERVER的方式传递给客户端的控件处理，同时客户端控件接受到XML数据以后也可以进行反序列化还原出数据类实例。

/**//*
 *                账单打印数据类
 * Create:2005-8-11    Version:WGWATER1.1   Author:maojun
 * 
 * */
using System;
using System.Xml;
using System.Xml.Serialization;
using System.IO;

namespace WGSys.DataExchange
{
    /**//// <summary>
    /// Summary description for BillPrintData.
    /// </summary>
    public class BillPrintData
    {
        private static XmlSerializer memBillPrnDataSerializer;
        static BillPrintData()
        {
            memBillPrnDataSerializer = new XmlSerializer(typeof(BillPrintData)); 
        }

        public string ToXml()
        {
            StringWriter sw = new StringWriter(); 
            XmlTextWriter writer = new XmlTextWriter(sw);
            memBillPrnDataSerializer.Serialize(writer,this);
            writer.Close();
            sw.Close();
            return sw.ToString();
        }

        public static BillPrintData FromXml(string xml)
        {
            StringReader r = new StringReader(xml);
            XmlTextReader reader = new XmlTextReader(r);
            return memBillPrnDataSerializer.Deserialize(reader) as BillPrintData;
        }
 
        //抄表员
        private string mynotename;
        [XmlAttribute]
        public string NoteName{
            get{return mynotename;}
            set{mynotename=value;}
        }
        //统册号
        private string mytcnumber;
        [XmlAttribute]
        public string TCNumber{
            get{return mytcnumber;}
            set{mytcnumber=value;}
        }
        ..
        ..
    }
}