小票打印代码

http://blog.sina.com.cn/s/blog_61090e890100gvq4.html

    public class TicketSet
    {
        public struct keyAndValue
        {
            public String keyStr;
            public String valueStr;
        }

        private List<keyAndValue> keyAndValueListTop = new List<keyAndValue>();
        /// <summary>
        /// 小票头部信息
        /// </summary>
        public List<keyAndValue> KeyAndValueListTop
        {
            get { return keyAndValueListTop; }
        }
        /// <summary>
        /// 增加小票头部键值对
        /// </summary>
        /// <param name="keyStr">键</param>
        /// <param name="valueStr">值</param>
        public void AddKeyAndValueTop(String keyStr, String valueStr)
        {
            keyAndValue keyandvale = new keyAndValue();
            keyandvale.keyStr = keyStr;
            keyandvale.valueStr = valueStr;
            this.keyAndValueListTop.Add(keyandvale);
        }

        private List<keyAndValue> keyAndValueListMid = new List<keyAndValue>();
        /// <summary>
        /// 小票中间费用信息
        /// </summary>
        public List<keyAndValue> KeyAndValueListMid
        {
            get { return keyAndValueListMid; }
        }
        /// <summary>
        /// 增加小票中间费用键值对
        /// </summary>
        /// <param name="keyStr">键</param>
        /// <param name="valueStr">值</param>
        public void AddKeyAndValueMid(String keyStr, String valueStr)
        {
            keyAndValue keyandvale = new keyAndValue();
            keyandvale.keyStr = keyStr;
            keyandvale.valueStr = valueStr;
            this.keyAndValueListMid.Add(keyandvale);
        }
        private List<keyAndValue> keyAndValueListFoot = new List<keyAndValue>();
        /// <summary>
        /// 小票底部信息
        /// </summary>
        public List<keyAndValue> KeyAndValueListFoot
        {
            get { return keyAndValueListFoot; }
        }
        /// <summary>
        /// 增加小票底部键值对
        /// </summary>
        /// <param name="keyStr">键</param>
        /// <param name="valueStr">值</param>
        public void AddKeyAndValueFoot(String keyStr, String valueStr)
        {
            keyAndValue keyandvale = new keyAndValue();
            keyandvale.keyStr = keyStr;
            keyandvale.valueStr = valueStr;
            this.keyAndValueListFoot.Add(keyandvale);
        }
        private String ticketSignature;
        /// <summary>
        /// 小票顶部签名
        /// </summary>
        public String TicketSignature
        {
            get { return ticketSignature; }
            set { ticketSignature = value; }
        }

        private String ticketTitle;
        /// <summary>
        /// 小票的标题
        /// </summary>
        public String TicketTitle
        {
            get { return ticketTitle; }
            set { ticketTitle = value; }
        }
        private String ticketFooter;

        /// <summary>
        /// 小票底部签名
        /// </summary>
        public String TicketFooter
        {
            get { return ticketFooter; }
            set { ticketFooter = value; }
        }
        private DataTable dtGoodsList;

        /// <summary>
        /// 商品列表信息
        /// 传入DataTable的格式
        /// 商品编码    商品名称    数量    单价    金额
        /// </summary>
        public DataTable DtGoodsList
        {
            get { return dtGoodsList; }
            set { dtGoodsList = value; }
        }
        private int ticketWidth;

        /// <summary>
        /// 小票宽度,按字符数计算
        /// </summary>
        public int TicketWidth
        {
            get { return ticketWidth; }
            set { ticketWidth = value; }
        }
        private Decimal colper1;

        /// <summary>
        /// 商品列表中第一个标题所占小票总宽度的百分比
        /// </summary>
        public Decimal Colper1
        {
            get { return colper1; }
            set { colper1 = value; }
        }
        private Decimal colper2;
        /// <summary>
        /// 商品列表中第二个标题所占小票总宽度的百分比
        /// </summary>
        public Decimal Colper2
        {
            get { return colper2; }
            set { colper2 = value; }
        }
        private Decimal colper3;
        /// <summary>
        /// 商品列表中第三个标题所占小票总宽度的百分比
        /// </summary>
        public Decimal Colper3
        {
            get { return colper3; }
            set { colper3 = value; }
        }

        private Decimal colper4;

        /// <summary>
        /// 商品列表中第四个标题所占小票总宽度的百分比
        /// </summary>
        public Decimal Colper4
        {
            get { return colper4; }
            set { colper4 = value; }
        }

        private Char signWeight;
        /// <summary>
        /// 重要分隔符的样式
        /// </summary>
        public Char SignWeight
        {
            get { return signWeight; }
            set { signWeight = value; }
        }
        private Char signLight;
        /// <summary>
        /// 一般分隔符的样式
        /// </summary>
        public Char SignLight
        {
            get { return signLight; }
            set { signLight = value; }
        }
        /// <summary>
        /// 商品列表设置
        /// </summary>
        /// <param name="ticket">TicketSet对象</param>
        /// 商品列表格式
        /// 商品名称    数量    单价    金额
        /// 李宁牌运动上衣
        /// 00009        1      290     290
        /// <returns>带格式的商品列表</returns>
        private String ItemsList()
        {
            StringBuilder result = new StringBuilder();

            if (this.dtGoodsList != null && this.dtGoodsList.Columns.Count > 0 && this.dtGoodsList.Rows.Count > 0)
            {
                result.Append(CreateLine(this.TicketWidth, this.SignWeight));

                result.Append(ArrangeArgPosition(this.dtGoodsList.Columns[1].Caption, this.TicketWidth, this.Colper1));

                result.Append(ArrangeArgPosition(this.dtGoodsList.Columns[2].Caption, this.TicketWidth, this.Colper2));

                result.Append(ArrangeArgPosition(this.dtGoodsList.Columns[3].Caption, this.TicketWidth, this.Colper3));

                result.Append(ArrangeArgPosition(this.dtGoodsList.Columns[4].Caption, this.TicketWidth, this.Colper4));

                result.Append("\r\n");
                result.Append(CreateLine(this.ticketWidth, this.SignLight));

                for (int i = 0; i < this.dtGoodsList.Rows.Count; i++)
                {
                    //商品名称
                    result.Append(SetArgPosition(this.dtGoodsList.Rows[i][1].ToString(), this.TicketWidth, false));
                    //商品编码
                    result.Append(ArrangeArgPosition(this.dtGoodsList.Rows[i][0].ToString(), this.TicketWidth, this.Colper1));
                    //数量
                    result.Append(ArrangeArgPosition(this.dtGoodsList.Rows[i][2].ToString(), this.TicketWidth, this.Colper2));
                    //单价
                    result.Append(ArrangeArgPosition(this.dtGoodsList.Rows[i][3].ToString(), this.TicketWidth, this.Colper3));
                    //金额
                    result.Append(ArrangeArgPosition(this.dtGoodsList.Rows[i][4].ToString(), this.TicketWidth, this.Colper4));

                    result.Append("\r\n");
                }
                result.Append(CreateLine(this.ticketWidth, this.SignLight));

            }
            return result.ToString();
        }
        /// <summary>
        /// 排列商品列表的表头信息
        /// </summary>
        /// <param name="arg">表头标题</param>
        /// <param name="charNum">标题所占总字符数，一般按照小票总宽度的百分比来设置</param>
        /// <returns>带有格式的标题</returns>
        private String ArrangeArgPosition(String arg, int ticketwidth, Decimal colPer)
        {
            StringBuilder result = new StringBuilder(arg);
            int charNum = Convert.ToInt32(ticketWidth * colPer);
            if (0 != charNum)
            {
                int argcount = System.Text.Encoding.Default.GetByteCount(arg);

                for (int i = 0; i < charNum - argcount; i++)
                {
                    result.Append(" ");
                }

            }
            else
            {
                //隐藏某一列
                result.Remove(0, result.Length);
            }
            return result.ToString();
        }
        /// <summary>
        /// 设置小票头部信息，可以自动区分汉字还是英文，格式只限2行
        /// </summary>
        /// <param name="arg">小票头部内容</param>
        /// <param name="ticketwidth">小票宽度，按照字符个数计算</param>
        /// <param name="isMiddle">是否中间对齐</param>
        /// <returns>带格式的小票头部信息</returns>
        private String SetArgPosition(String arg, int ticketwidth, bool isMiddle)
        {
            StringBuilder result = new StringBuilder();
            int argnum = System.Text.Encoding.Default.GetByteCount(arg);
            if (argnum <= ticketwidth)
            {
                if (isMiddle)
                {
                    for (int i = 0; i < (ticketwidth - argnum) / 2; i++)
                    {
                        result.Append(" ");
                    }
                }
                result.Append(arg);
                result.Append("\r\n");

            }
            else
            {
                for (int i = 0; i <= ticketwidth / 2; i++)
                {
                    int temp = ticketwidth / 2 + i;
                    if (ticketwidth == System.Text.Encoding.Default.GetByteCount(arg.Substring(0, temp)) || ticketwidth == System.Text.Encoding.Default.GetByteCount(arg.Substring(0, temp)) - 1)
                    {
                        result.Append(arg.Substring(0, temp));
                        result.Append("\r\n");
                        result.Append(arg.Substring(temp, arg.Length - (temp)));
                        result.Append("\r\n");
                        break;
                    }
                }
            }
            return result.ToString();

        }
        /// <summary>
        /// 设置小票各部分的分隔线
        /// </summary>
        /// <param name="ticketwidth">小票的宽度，按照字符个数计算</param>
        /// <param name="signChar">分隔线的样式</param>
        /// <returns>小票的分隔线</returns>
        private String CreateLine(int ticketwidth, Char signChar)
        {

            StringBuilder result = new StringBuilder();
            for (int i = 0; i < ticketwidth; i++)
            {
                result.Append(signChar);
            }
            result.Append("\r\n");

            return result.ToString();

        }

        /// <summary>
        /// 生成小票
        /// </summary>
        /// <param name="ticket">TicketSet对象</param>
        /// <returns>最终小票结果</returns>
        public String Ticket()
        {
            StringBuilder ticketStr = new StringBuilder();
            //小票头部
            ticketStr.Append(SetArgPosition(this.TicketSignature, this.TicketWidth, true));
            ticketStr.Append(SetArgPosition(this.TicketTitle, this.TicketWidth, true));
            ticketStr.Append(CreateLine(this.TicketWidth, this.signWeight));

            //小票上部内容
            for (int i = 0; i < this.KeyAndValueListTop.Count; i++)
            {
                ticketStr.Append(this.KeyAndValueListTop[i].keyStr + this.KeyAndValueListTop[i].valueStr + "\r\n");
            }

            //商品列表
            ticketStr.Append(ItemsList());

            //小票中部内容
            for (int i = 0; i < this.KeyAndValueListMid.Count; i++)
            {
                ticketStr.Append(this.KeyAndValueListMid[i].keyStr + this.KeyAndValueListMid[i].valueStr + "\r\n");
            }
            ticketStr.Append(CreateLine(this.TicketWidth, this.signWeight));

            //小票下部内容
            for (int i = 0; i < this.KeyAndValueListFoot.Count; i++)
            {
                ticketStr.Append(SetArgPosition(this.KeyAndValueListFoot[i].keyStr + this.KeyAndValueListFoot[i].valueStr, this.TicketWidth, false));
            }

            //小票底部

            ticketStr.Append(SetArgPosition(this.TicketFooter, this.TicketWidth, false));

            return ticketStr.ToString();

        }
    }