protected XmlDocument GenerationAddReportColumn(IList<ReportColumn> columnList,

           string fromRdlcPath, string toRdlcPath)

        {

            XmlDocument xmlDoc = new XmlDocument();

            xmlDoc.Load(Server.MapPath(fromRdlcPath));

            XmlNodeList fileds = xmlDoc.GetElementsByTagName("Fields");

            XmlNodeList tablixColumns = xmlDoc.GetElementsByTagName("TablixColumns");

            XmlNodeList tablixMembers = xmlDoc.GetElementsByTagName("TablixColumnHierarchy");

            XmlNodeList tablixRows = xmlDoc.GetElementsByTagName("TablixRows");

            foreach (var item in columnList)

            {

                //添加Field节点

                XmlNode filedNode = fileds.Item().FirstChild.CloneNode(true);

                if (!fileds.Item().ChildNodes.Cast<XmlNode>().Any(c=>c.Attributes["Name"].Value==item.Field))

                {

                    filedNode.Attributes["Name"].Value = item.Field;

                    filedNode.FirstChild.InnerText = item.Field;

                    filedNode.ChildNodes[].InnerText = string.IsNullOrWhiteSpace(item.FieldType) ? "System.String" : item.FieldType;

                    fileds.Item().AppendChild(filedNode);

                }

                //添加TablixColumn

                XmlNode tablixColumn = tablixColumns.Item().FirstChild;

                XmlNode newtablixColumn = tablixColumn.CloneNode(true);

                newtablixColumn.FirstChild.InnerText = item.Width;

                tablixColumns.Item().AppendChild(newtablixColumn);

                //TablixMember

                XmlNode tablixMember = tablixMembers.Item().FirstChild.FirstChild;

                XmlNode newTablixMember = tablixMember.CloneNode(true);

                tablixMembers.Item().FirstChild.AppendChild(newTablixMember);

                var tablixRowsRowCells1 = tablixRows.Item().FirstChild.ChildNodes[];

                XmlNode tablixRowCell1 = tablixRowsRowCells1.FirstChild;

                XmlNode newtablixRowCell1 = tablixRowCell1.CloneNode(true);

                var textBox1 = newtablixRowCell1.FirstChild.ChildNodes[];

                textBox1.Attributes["Name"].Value = "Textbox_"+item.Field;

                var paragraphs = textBox1.ChildNodes.Cast<XmlNode>().Where(c => c.Name == "Paragraphs").FirstOrDefault();

                paragraphs.FirstChild.FirstChild.FirstChild.FirstChild.InnerText = item.ColumnName;

                var defaultName1 = textBox1.ChildNodes.Cast<XmlNode>().Where(c => c.Name == "rd:DefaultName").FirstOrDefault().InnerText = "Textbox_" + item.Field;

                tablixRowsRowCells1.AppendChild(newtablixRowCell1);

                var tablixRowsRowCells2 = tablixRows.Item().ChildNodes[].ChildNodes[];

                XmlNode tablixRowCell2 = tablixRowsRowCells2.FirstChild;

                XmlNode newtablixRowCell2 = tablixRowCell2.CloneNode(true);

                var textBox2 = newtablixRowCell2.FirstChild.ChildNodes[];

                textBox2.Attributes["Name"].Value = item.Field;

                var paragraphs2 = textBox2.ChildNodes.Cast<XmlNode>().Where(c => c.Name == "Paragraphs").FirstOrDefault();

                paragraphs2.FirstChild.FirstChild.FirstChild.FirstChild.InnerText = "=Fields!" + item.Field + ".Value";

                var defaultName2 = textBox2.ChildNodes.Cast<XmlNode>().Where(c => c.Name == "rd:DefaultName").FirstOrDefault().InnerText = item.Field;

                tablixRowsRowCells2.AppendChild(newtablixRowCell2);

            }

            xmlDoc.Save(Server.MapPath(toRdlcPath));

            return xmlDoc;

        }

    /// <summary>

    /// 报表列描述

    /// </summary>

    public class ReportColumn

    {

        public string Field { get; set; }

        public string ColumnName { get; set; }

        public string Width { get; set; }

        public string FieldType { get; set; }

    }