System.Xml.XmlNamespaceManager.LookupNamespace C# (CSharp) Méthode

        public virtual string LookupNamespace( string prefix ) {
            int declIndex = LookupNamespaceDecl( prefix );
            return ( declIndex == -1  ) ? null : nsdecls[declIndex].uri;
        }

        // Public Methods
        #region CreateMasterContents(string styleFilePath, ArrayList odtFiles)
        public void CreateMasterContents(string styleFilePath, ArrayList odtFiles)
        {
            var doc = new XmlDocument();
            doc.Load(styleFilePath);
            var nsmgr = new XmlNamespaceManager(doc.NameTable);
            nsmgr.AddNamespace("office", "urn:oasis:names:tc:opendocument:xmlns:office:1.0");
            nsmgr.AddNamespace("text", "urn:oasis:names:tc:opendocument:xmlns:text:1.0");
            nsmgr.AddNamespace("xlink", "http://www.w3.org/1999/xlink");
          

            // if new stylename exists
            XmlElement root = doc.DocumentElement;
            string style = "//office:text";
            if (root != null)
            {

                XmlNode node = root.SelectSingleNode(style, nsmgr); // work
                if (node != null)
                {
                    for (int i = 0; i < odtFiles.Count; i++) // ODM - ODT 
                    {
                        string outputFile = odtFiles[i].ToString();
                        outputFile = Path.ChangeExtension(outputFile, "odt");
                        XmlNode newNode;
                        newNode = doc.CreateNode("element", "text:section", nsmgr.LookupNamespace("text"));
                        //attribute
                        XmlAttribute xmlAttrib = doc.CreateAttribute("text:style-name", nsmgr.LookupNamespace("text"));
                        xmlAttrib.Value = "SectODM";
                        newNode.Attributes.Append(xmlAttrib);

                        xmlAttrib = doc.CreateAttribute("text:name", nsmgr.LookupNamespace("text"));
                        xmlAttrib.Value = outputFile;
                        newNode.Attributes.Append(xmlAttrib);

                        xmlAttrib = doc.CreateAttribute("text:protected", nsmgr.LookupNamespace("text"));
                        xmlAttrib.Value = "false";
                        newNode.Attributes.Append(xmlAttrib);


                        XmlNode newNode1 = doc.CreateNode("element", "text:section-source", nsmgr.LookupNamespace("text"));
                        //attribute
                        XmlAttribute xmlAttrib1 = doc.CreateAttribute("xlink:href", nsmgr.LookupNamespace("xlink"));
                        xmlAttrib1.Value = "../" + outputFile;
                        newNode1.Attributes.Append(xmlAttrib1);


                        xmlAttrib1 = doc.CreateAttribute("text:filter-name", nsmgr.LookupNamespace("text"));
                        xmlAttrib1.Value = "writer8";
                        newNode1.Attributes.Append(xmlAttrib1);

                        newNode.AppendChild(newNode1);
                        node.AppendChild(newNode);
                    }
                }
            }

            doc.Save(styleFilePath);

        }