读写XML文件

        #region 读写xml配置文件

        public void ReadPrintConfig()
        {
            string sFileName = Application.StartupPath + @"" + this.Text + ".xml";
            if (!File.Exists(sFileName)) return;
            //读取打印机参数
            XmlDocument xmldoc = new XmlDocument();
            xmldoc.Load(sFileName);
            //
            XmlNode PrinterParam = xmldoc.SelectSingleNode("PrintConfig/PrinterParam");
            if (PrinterParam != null)
            {
                XmlNode xesub1 = PrinterParam.SelectSingleNode("PrinterName");
                if (xesub1 != null) this.cbxSelectPrinter.Text = xesub1.InnerText;

                XmlNode xesub2 = PrinterParam.SelectSingleNode("PaperSize");
                if (xesub2 != null)
                {
                    XmlElement xe = (XmlElement)xesub2;
                    this.cbxPaperKind.Text = xe.GetAttribute("Kind");
                    this.nudPaperWidth.Value = Math.Max(Convert.ToInt32(xe.GetAttribute("Width")),50);
                    this.nudPaperHeight.Value = Math.Max(Convert.ToInt32(xe.GetAttribute("Height")),50);
                }
            }
            //读取打印项目位置
            XmlNode PrintItemList = xmldoc.SelectSingleNode("PrintConfig/PrintItemList");
            if (PrintItemList == null) return;
            XmlNodeList xnl = PrintItemList.ChildNodes;
            foreach (XmlNode xnf in xnl)
            {
                XmlElement xe = (XmlElement)xnf;
                string sName = xe.Name;
                int x = Convert.ToInt32(xe.GetAttribute("X"));
                int y = Convert.ToInt32(xe.GetAttribute("Y"));
                //
                //MessageBox.Show(sName);
                Control[] ctrlList = this.Controls.Find(sName,true);
                if (ctrlList.Length > 0)
                {
                    ctrlList[0].Left = x;
                    ctrlList[0].Top = y;
                }
            }
        }

        private void WritePrintConfig()
        {
            XmlDocument xmldoc = new XmlDocument();
            //xml声明行
            var xmlnode = xmldoc.CreateNode(XmlNodeType.XmlDeclaration,"","");
            xmldoc.AppendChild(xmlnode);
            //打印配置
            XmlNode PrintConfig = xmldoc.CreateNode(XmlNodeType.Element,"PrintConfig",null);
            xmldoc.AppendChild(PrintConfig);
            //打印机参数
            XmlNode PrinterParam = xmldoc.CreateNode(XmlNodeType.Element,"PrinterParam",null);
            PrintConfig.AppendChild(PrinterParam);
            XmlElement xesub1 = xmldoc.CreateElement("PrinterName");
            xesub1.InnerText = this.cbxSelectPrinter.Text;
            PrinterParam.AppendChild(xesub1);
            XmlElement xesub2 = xmldoc.CreateElement("PaperSize");
            xesub2.SetAttribute("Kind",this.cbxPaperKind.Text);
            xesub2.SetAttribute("Width",this.nudPaperWidth.Value.ToString());
            xesub2.SetAttribute("Height",this.nudPaperHeight.Value.ToString());
            PrinterParam.AppendChild(xesub2);
            //打印项目列表
            XmlNode PrintItemList = xmldoc.CreateNode(XmlNodeType.Element,"PrintItemList",null);
            PrintConfig.AppendChild(PrintItemList);
            foreach (Control ctrl in this.Controls)
            {
                //MessageBox.Show(ctrl.Name);
                if (ctrl is Label)
                {
                    XmlElement xe = xmldoc.CreateElement(ctrl.Name);
                    xe.SetAttribute("X",ctrl.Left.ToString());
                    xe.SetAttribute("Y",ctrl.Top.ToString());
                    PrintItemList.AppendChild(xe);
                }
            }
            //保存
            string sFileName = Application.StartupPath + @"" + this.Text + ".xml";
            if (File.Exists(sFileName)) File.Delete(sFileName);
            xmldoc.Save(sFileName);
            MessageBox.Show("打印配置已成功保存到文件：nn" + sFileName);
        }

        #endregion

生成的XML文件格式如下：

<?xml version="1.0"?>
<PrintConfig>
  <PrinterParam>
    <PrinterName>Microsoft XPS Document Writer</PrinterName>
    <PaperSize Kind="自定义" Width="241" Height="152" />
  </PrinterParam>
  <PrintItemList>
    <lbl备注 X="538" Y="441" />
    <lbl税务机关 X="554" Y="81" />
    <lbl纳税人识别号 X="151" Y="117" />
    <lbl填票人 X="156" Y="468" />
    <lbl金额合计 X="732" Y="333" />
    <lbl金额合计大写 X="151" Y="387" />
    <lbl税种 X="151" Y="230" />
    <lbl实缴金额 X="731" Y="230" />
    <lbl品目名称 X="330" Y="231" />
    <lbl地址 X="151" Y="165" />
    <lbl填开日期 X="323" Y="81" />
    <lbl纳税人名称 X="395" Y="114" />
  </PrintItemList>
</PrintConfig>

（编辑：李大同）

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