近日研究RDLC报表，发现其不能与RDL报表兼容，尤其是将RDL报表转换成RDLC报表。网上的资料贴出的的转换方式复杂且不切实际，遂决定深入研究。经研究发现，RDL报表与RDLC报表的XML格式有些差异，将RDL报表的XML格式改成与RDLC报表的XML格式相同，发现转换成功！ 如需转换123.rdl文件，只需RDLConvertRDLC("123.rdl")，即可转换成123.rdlc文件。由于本人对带命名空间的XML文件操作不熟悉，不能将除根节点意外的其他节点的xmlns属性只去掉，如有高手，欢迎指教！

        private void RDLConvertRDLC(string strFile)
        {
            if(File.Exists(strFile))
            {
                try
                {
                    XmlDocument xmlBak;
                    XmlNamespaceManager nsMgrBak;
                    XmlNodeList Reports;

                    // 打开需转换的XML文件
                    try
                    {
                        xmlBak = new XmlDocument();
                        xmlBak.Load(strFile);
                        nsMgrBak = new XmlNamespaceManager(xmlBak.NameTable);
                        nsMgrBak.AddNamespace("nsBak", "http://schemas.microsoft.com/sqlserver/reporting/2010/01/reportdefinition");
                        Reports = xmlBak.SelectSingleNode("/nsBak:Report", nsMgrBak).ChildNodes;
                    }
                    catch
                    {
                        File.Move(strFile, strFile + "c");
                        return;
                    }

                    // 创建新的XML文件
                    XmlDocument xmlDoc = new XmlDocument();
                    XmlDeclaration dec = xmlDoc.CreateXmlDeclaration("1.0", "utf-8", null);
                    xmlDoc.AppendChild(dec);

                    // 创建一个根节点Report
                    XmlElement root = xmlDoc.CreateElement("Report");
                    root.SetAttribute("xmlns:rd", "http://schemas.microsoft.com/SQLServer/reporting/reportdesigner");
                    root.SetAttribute("xmlns", "http://schemas.microsoft.com/sqlserver/reporting/2008/01/reportdefinition");
                    xmlDoc.AppendChild(root);

                    // 拷贝节点数据到新XML文件
                    for (int i = 0; i < Reports.Count; i++)
                    {
                        if (Reports[i].Name != "AutoRefresh")
                        {
                            if (Reports[i].Name == "ReportSections")
                            {
                                XmlNodeList ReportSections = xmlBak.SelectSingleNode("/nsBak:Report/nsBak:ReportSections/nsBak:ReportSection", nsMgrBak).ChildNodes;
                                for (int j = 0; j < ReportSections.Count; j++)
                                {
                                    XmlElement newElement = (XmlElement)xmlDoc.ImportNode(ReportSections[j], true);
                                    newElement.SetAttribute("xmlns", "http://schemas.microsoft.com/sqlserver/reporting/2008/01/reportdefinition");
                                    root.AppendChild(newElement);
                                }
                            }
                            else
                            {
                                XmlElement newElement = (XmlElement)xmlDoc.ImportNode(Reports[i], true);
                                newElement.SetAttribute("xmlns", "http://schemas.microsoft.com/sqlserver/reporting/2008/01/reportdefinition");
                                root.AppendChild(newElement);
                            }
                        }
                    }
                    xmlDoc.Save(@strFile + "c");
                    File.Delete(strFile);
                }
                catch (System.Exception ex)
                {
                    MessageBox.Show(ex.Message.ToString(), "错误", MessageBoxButtons.OK, MessageBoxIcon.Information);
                }
            }
            else
            {
                MessageBox.Show("文件"+strFile+"不存在！", "错误", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
        }
    }