// The following CreateBasicXMLItmesForSchematicElt private procedure is used to create the first expected XML items for a XML NodeFeature or LinkFeature
        private void CreateBasicXMLItemsForSchematicElt(ESRI.ArcGIS.Geodatabase.IFeature inFeature,
                                                        ref MSXML2.DOMDocument outDOMDoc,
                                                        ref MSXML2.IXMLDOMElement outXMLElement,
                                                        string inEltTypeName)
        {
            MSXML2.IXMLDOMElement xmlElt_EltTypeName;
            MSXML2.IXMLDOMElement xmlElt_ExternalUID;
            MSXML2.IXMLDOMElement xmlElt_DatasourceName;
            MSXML2.IXMLDOMElement xmlElt_UCID;
            MSXML2.IXMLDOMElement xmlElt_UOID;

            // Specifying its FeatureClassName
            xmlElt_EltTypeName = outDOMDoc.createElement("FeatureClassName");
            outXMLElement.appendChild(xmlElt_EltTypeName);
            if (inFeature.Fields.FindField("Feeder") != -1)
            {
                xmlElt_EltTypeName.nodeTypedValue = inEltTypeName + "sFeeder" + inFeature.get_Value(inFeature.Fields.FindField("Feeder")).ToString();
            }
            else
            {
                xmlElt_EltTypeName.nodeTypedValue = inEltTypeName + "s";
            }

            // Specifying its ExternalUniqueID
            xmlElt_ExternalUID = outDOMDoc.createElement("ExternalUniqueID");
            outXMLElement.appendChild(xmlElt_ExternalUID);
            xmlElt_ExternalUID.nodeTypedValue = inEltTypeName + "-" + inFeature.OID.ToString();

            // Specifying its DatasourceName
            xmlElt_DatasourceName = outDOMDoc.createElement("DatasourceName");
            outXMLElement.appendChild(xmlElt_DatasourceName);
            xmlElt_DatasourceName.nodeTypedValue = "XMLDataSource";

            // Specifying its UCID
            xmlElt_UCID = outDOMDoc.createElement("UCID");
            outXMLElement.appendChild(xmlElt_UCID);
            xmlElt_UCID.nodeTypedValue = inFeature.Class.ObjectClassID;

            // Add UOID to NodeElement
            xmlElt_UOID = outDOMDoc.createElement("UOID");
            outXMLElement.appendChild(xmlElt_UOID);
            xmlElt_UOID.nodeTypedValue = inFeature.OID;
        }
        // saves and closes XML document
        private void SaveAndCloseDocument(MSXML2.IXMLDOMElement responseElem, MSXML2.IXMLDOMDocument document)
        {
            document.async = false;
            // create Processing Instruction for XML documdnt
            MSXML2.IXMLDOMProcessingInstruction procsInstruct = document.createProcessingInstruction("xml", "version=\"1.0\" encoding=\"utf-8\"");
            // create primary element
            MSXML2.IXMLDOMElement elem = document.createElement("p2p_lng");

            // add response object passed to the primary element as child node
            elem.appendChild(responseElem);
            // add Processing Instruction object and primary object to document
            // object passed as child nodes and save the document
            document.appendChild(procsInstruct);
            document.appendChild(elem);
            document.save(ResponsPath);
        }
        // writes request XML according to the parameter passed
        public void WriteRequest(string type, string searchValue, string mask)
        {
            // create a document object
            MSXML2.IXMLDOMDocument document = CreateDocument();

            // create request element
            MSXML2.IXMLDOMElement requestElem = document.createElement("request");

            // set attributes of request element
            requestElem.setAttribute("type", type);

            // if one of these kinds of request is to be made
            // specify the filename and pertaining info too.
            if (type.CompareTo("SHOWFILES") != 0)
            {
                string ReqType = "";
                if (type.CompareTo("CHAT") == 0)
                {
                    ReqType = "message";
                }
                else
                {
                    ReqType = "scope";
                }

                MSXML2.IXMLDOMElement file_infoElem = document.createElement(ReqType.ToString());

                if (type.CompareTo("CHAT") == 0)
                {
                    file_infoElem.setAttribute("sendername", searchValue.Substring(0, searchValue.IndexOf("(")));
                    file_infoElem.setAttribute("senderIP", searchValue.Substring(searchValue.IndexOf("(") + 1).Substring(0, searchValue.Substring(searchValue.IndexOf("(") + 1).Length - 1));
                    file_infoElem.setAttribute("chatmsg", mask);
                }
                else
                {
                    file_infoElem.setAttribute("type", searchValue);
                    file_infoElem.setAttribute("mask", mask);
                }
                requestElem.appendChild(file_infoElem);
            }

            // close and save the documdent
            SaveAndCloseDocument(requestElem, document);
        }
        // writes error XML responses
        public void WriteErrorResponse(string error)
        {
            // create a document object
            MSXML2.IXMLDOMDocument document = CreateDocument();
            // create response and error info elements
            MSXML2.IXMLDOMElement responseElem  = document.createElement("response");
            MSXML2.IXMLDOMElement errorInfoElem = document.createElement("errorinfo");

            // set attribute of response element
            responseElem.setAttribute("type", "ERROR");
            // set attribute of errorinfo element
            errorInfoElem.setAttribute("errorcode", "1");
            errorInfoElem.setAttribute("severity", "Error");
            errorInfoElem.setAttribute("description", error);
            // add errorinfo element to response object as a child
            responseElem.appendChild(errorInfoElem);
            // save the document
            SaveAndCloseDocument(responseElem, document);
        }
        // The following CompleteXMLEltByProperties private procedure is used to create all the expected propertyset properties listed in the input PropertiesArray array
        private void CompleteXMLEltByProperties(ESRI.ArcGIS.Geodatabase.IFeature inFeature,
                                                ref MSXML2.DOMDocument outDOMDoc,
                                                ref MSXML2.IXMLDOMElement outXMLElement,
                                                string[] propertiesArray)
        {
            int i = 0;

            MSXML2.IXMLDOMElement xmlPropertySet;
            MSXML2.IXMLDOMElement xmlPropertyArray;
            MSXML2.IXMLDOMElement xmlPropertySetProperty;
            MSXML2.IXMLDOMElement xmlProperty_Key;
            MSXML2.IXMLDOMElement xmlProperty_Value;

            if (propertiesArray.Length > 0)
            {
                //-------- PropertySet Section START --------
                // Creating the PropertySet element for the input outXMLElement
                xmlPropertySet = outDOMDoc.createElement("PropertySet");
                outXMLElement.appendChild(xmlPropertySet);
                // Creating the PropertyArray element
                xmlPropertyArray = outDOMDoc.createElement("PropertyArray");
                xmlPropertySet.appendChild(xmlPropertyArray);

                while (i < propertiesArray.Length)
                {
                    // Creating the i PropertySetProperty
                    xmlPropertySetProperty = outDOMDoc.createElement("PropertySetProperty");
                    xmlPropertyArray.appendChild(xmlPropertySetProperty);
                    // Specifying the key && value field related to that i PropertySetProperty
                    xmlProperty_Key = outDOMDoc.createElement("Key");
                    xmlPropertySetProperty.appendChild(xmlProperty_Key);
                    xmlProperty_Key.nodeTypedValue = propertiesArray[i].ToString();
                    xmlProperty_Value = outDOMDoc.createElement("Value");
                    xmlPropertySetProperty.appendChild(xmlProperty_Value);
                    xmlProperty_Value.nodeTypedValue = inFeature.get_Value(inFeature.Fields.FindField(propertiesArray[i].ToString()));
                    i += 1;
                }
            }
            //-------- PropertySet Section END --------
        }
        private void WriteShowfileResponse(string reqType)
        {
            // create a document object
            MSXML2.IXMLDOMDocument document = CreateDocument();
            // create response and error info elements
            MSXML2.IXMLDOMElement responseElem = document.createElement("response");
            // set attribute of response element
            responseElem.setAttribute("type", reqType);

            // open share.ini for reading
            StreamReader readfile = new StreamReader(SharedResourceInfoPath);
            string       readData;

            // read entire file
            while ((readData = readfile.ReadLine()) != null)
            {
                try
                {
                    // for each entry in share .ini create a fileinfo element
                    // and fill it with required information
                    MSXML2.IXMLDOMElement file_infoElem = document.createElement("fileinfo");
                    int index = readData.IndexOf("=", 0);
                    file_infoElem.setAttribute("filename", readData.Substring(0, index));
                    file_infoElem.setAttribute("mask", readData.Substring(index + 1, 1));

                    int secindex = -1;
                    if (-1 != (secindex = readData.IndexOf("=", index + 1)))
                    {
                        file_infoElem.setAttribute("filesize", readData.Substring(secindex + 1));
                    }

                    // add this element to response element as child
                    responseElem.appendChild(file_infoElem);
                }
                catch (Exception e)      { MessageBox.Show("Problem faced while responding : " + e.Message); }
            }
            // close and save the documdent
            SaveAndCloseDocument(responseElem, document);
        }
        // The following CreateXMLLinkElt private procedure is used to create all the expected XML items for a XML LinkFeature related to a HV_Line or LV_Line simple edge feature
        private void CreateXMLLinkElt(ESRI.ArcGIS.Geodatabase.IFeature inFeature, ref MSXML2.DOMDocument outDOMDoc, ref MSXML2.IXMLDOMElement outXMLElements, string inLinkTypeName)
        {
            if (!inFeature.HasOID)
            {
                MessageBox.Show("No OID");
                return;
            }

            MSXML2.IXMLDOMElement xmlLink;
            MSXML2.IXMLDOMElement xmlLink_FromNode;
            MSXML2.IXMLDOMElement xmlLink_ToNode;
            int    indexListPoints;
            string listPoints;
            int    nbVertices;
            string vertices;

            MSXML2.IXMLDOMElement xmlLink_Vertices;
            MSXML2.IXMLDOMElement xmlLink_Vertex;
            MSXML2.IXMLDOMElement xmlLink_XVertex;
            MSXML2.IXMLDOMElement xmlLink_YVertex;
            string xValue;
            string yValue;

            //-------- Feature Section START related to the "infeature" --------
            // Creating the LinkFeature Feature
            xmlLink = outDOMDoc.createElement("LinkFeature");
            outXMLElements.appendChild(xmlLink);

            // Specifying basic XML items for this LinkFeature
            CreateBasicXMLItemsForSchematicElt(inFeature, ref outDOMDoc, ref xmlLink, inLinkTypeName);
            // Specifying its FromNode
            xmlLink_FromNode = outDOMDoc.createElement("FromNode");
            xmlLink.appendChild(xmlLink_FromNode);
            xmlLink_FromNode.nodeTypedValue = inFeature.get_Value(inFeature.Fields.FindField("FromJunctionType")) + "-" + inFeature.get_Value(inFeature.Fields.FindField("FromJunctionOID"));
            // Specifying its ToNode
            xmlLink_ToNode = outDOMDoc.createElement("ToNode");
            xmlLink.appendChild(xmlLink_ToNode);
            xmlLink_ToNode.nodeTypedValue = inFeature.get_Value(inFeature.Fields.FindField("ToJunctionType")) + "-" + inFeature.get_Value(inFeature.Fields.FindField("ToJunctionOID"));

            //Add Vertices to LinkFeature ---- NEED TO BE COMPLETED
            indexListPoints = inFeature.Fields.FindField("ListPoints");
            if (indexListPoints > 0)
            {
                listPoints = "";
                listPoints = inFeature.get_Value(indexListPoints).ToString();
                if (listPoints != "")
                {
                    int foundChar = listPoints.IndexOf(";", 1);
                    nbVertices = System.Convert.ToInt32(listPoints.Substring(0, foundChar));
                    vertices   = listPoints.Substring(foundChar + 1);
                    if (nbVertices > 0)
                    {
                        // Specifying its Vertices
                        xmlLink_Vertices = outDOMDoc.createElement("Vertices");
                        xmlLink.appendChild(xmlLink_Vertices);

                        int iLoc;
                        for (int i = 1; i <= nbVertices; i++)
                        {
                            xValue = "";
                            yValue = "";
                            iLoc   = vertices.IndexOf(";", 1);
                            if (vertices != "" && (iLoc) > 0)
                            {
                                xValue = vertices.Substring(0, iLoc);
                            }
                            vertices = vertices.Substring(iLoc + 1);
                            iLoc     = vertices.IndexOf(";", 1);
                            if (vertices != ";" && (iLoc) > 0)
                            {
                                yValue = vertices.Substring(0, iLoc);
                            }

                            if (xValue != "" && yValue != "")
                            {
                                xmlLink_Vertex = outDOMDoc.createElement("Vertex");
                                xmlLink_Vertices.appendChild(xmlLink_Vertex);
                                xmlLink_XVertex = outDOMDoc.createElement("X");
                                xmlLink_Vertex.appendChild(xmlLink_XVertex);
                                xmlLink_XVertex.nodeTypedValue = xValue;
                                xmlLink_YVertex = outDOMDoc.createElement("Y");
                                xmlLink_Vertex.appendChild(xmlLink_YVertex);
                                xmlLink_YVertex.nodeTypedValue = yValue;
                                if (vertices.Length - iLoc > 0)
                                {
                                    vertices = vertices.Substring(iLoc + 1);                                     //sVertices.Length - iLoc)
                                }
                                else
                                {
                                    break;
                                }
                            }
                            else
                            {
                                break;
                            }
                        }
                    }
                }
            }
            else
            {            // Retrieving ListPoint from geometry
                ESRI.ArcGIS.Geometry.IPolyline        oPoly   = (ESRI.ArcGIS.Geometry.IPolyline)inFeature.ShapeCopy;
                ESRI.ArcGIS.Geometry.IPointCollection colLink = (ESRI.ArcGIS.Geometry.IPointCollection)oPoly;
                if (colLink != null && colLink.PointCount > 2)
                {
                    ESRI.ArcGIS.Geometry.IPoint oPoint;

                    xmlLink_Vertices = outDOMDoc.createElement("Vertices");
                    xmlLink.appendChild(xmlLink_Vertices);
                    for (int i = 1; i < colLink.PointCount - 1; i++)
                    {
                        oPoint = colLink.get_Point(i);

                        xmlLink_Vertex = outDOMDoc.createElement("Vertex");
                        xmlLink_Vertices.appendChild(xmlLink_Vertex);
                        xmlLink_XVertex = outDOMDoc.createElement("X");
                        xmlLink_Vertex.appendChild(xmlLink_XVertex);
                        xmlLink_XVertex.nodeTypedValue = oPoint.X;
                        xmlLink_YVertex = outDOMDoc.createElement("Y");
                        xmlLink_Vertex.appendChild(xmlLink_YVertex);
                        xmlLink_YVertex.nodeTypedValue = oPoint.Y;
                    }
                }
            }

            //Specifying its properties
            switch (inFeature.Class.AliasName)
            {
            case "LV_Line":
            {
                CompleteXMLEltByProperties(inFeature, ref outDOMDoc, ref xmlLink, m_LVLinesPropertiesArray);
                break;
            }
            }
            //-------- Feature Section END related to the "infeature" --------
        }
        // The following CreateXMLLNodeElt private procedure is used to create all the expected
        // XML items for a XML NodeFeature related to a Station or Feeder simple junction feature
        private void CreateXMLNodeElt(ESRI.ArcGIS.Geodatabase.IFeature inFeature, ref MSXML2.DOMDocument outDOMDoc, ref MSXML2.IXMLDOMElement outXMLElements, string inNodeTypeName)
        {
            if (!inFeature.HasOID)
            {
                MessageBox.Show("No OID");
                return;
            }

            MSXML2.IXMLDOMElement xmlNode;
            MSXML2.IXMLDOMElement xmlNode_XCoord;
            MSXML2.IXMLDOMElement xmlNode_YCoord;
            MSXML2.IXMLDOMElement xmlNode_RelatedContainerID;
            bool relatedContainer;

            MSXML2.IXMLDOMNodeList xmlNodeList;
            MSXML2.IXMLDOMElement  xmlDrawing;
            MSXML2.IXMLDOMElement  xmlDrawing_EltTypeName;
            MSXML2.IXMLDOMElement  xmlDrawing_ExternalUID;

            //-------- Feature Section START related to the "infeature" --------
            // Creating the NodeFeature element
            xmlNode = outDOMDoc.createElement("NodeFeature");
            outXMLElements.appendChild(xmlNode);
            // Specifying basic XML items for this NodeFeature
            CreateBasicXMLItemsForSchematicElt(inFeature, ref outDOMDoc, ref xmlNode, inNodeTypeName);

            // Specifying its X && Y when they exist
            if ((inFeature.Fields.FindField("X") > 0) && (inFeature.Fields.FindField("Y") > 0))
            {
                // Specifying InitialX
                xmlNode_XCoord = outDOMDoc.createElement("InitialX");
                xmlNode.appendChild(xmlNode_XCoord);
                xmlNode_XCoord.nodeTypedValue = inFeature.get_Value(inFeature.Fields.FindField("X"));
                // Specifying InitialY
                xmlNode_YCoord = outDOMDoc.createElement("InitialY");
                xmlNode.appendChild(xmlNode_YCoord);
                xmlNode_YCoord.nodeTypedValue = inFeature.get_Value(inFeature.Fields.FindField("Y"));
            }
            else
            {
                // Retrieving initial position from Geometry
                ESRI.ArcGIS.Geometry.IPoint oPoint = (ESRI.ArcGIS.Geometry.IPoint)inFeature.ShapeCopy;

                if (oPoint != null)
                {
                    // Specifying InitialX
                    xmlNode_XCoord = outDOMDoc.createElement("InitialX");
                    xmlNode.appendChild(xmlNode_XCoord);
                    xmlNode_XCoord.nodeTypedValue = oPoint.X;
                    // Specifying InitialY
                    xmlNode_YCoord = outDOMDoc.createElement("InitialY");
                    xmlNode.appendChild(xmlNode_YCoord);
                    xmlNode_YCoord.nodeTypedValue = oPoint.Y;
                }
            }

            xmlNode_RelatedContainerID = outDOMDoc.createElement("RelatedContainerID");
            xmlNode.appendChild(xmlNode_RelatedContainerID);

            // Specifying its properties
            switch (inFeature.Class.AliasName)
            {
            case "Station":
            {
                xmlNode_RelatedContainerID.nodeTypedValue = "Container-" + System.Convert.ToString(inFeature.get_Value(inFeature.Fields.FindField("Feeder")));
                // For Station feature, the field contained in the StationsPropertiesArray will be exported
                CompleteXMLEltByProperties(inFeature, ref outDOMDoc, ref xmlNode, m_stationsPropertiesArray);
                break;
            }

            case "Feeder":
            {
                xmlNode_RelatedContainerID.nodeTypedValue = "Container-" + inFeature.OID.ToString();
                // For Feeder feature, the field contained in the StationsPropertiesArray will be exported
                CompleteXMLEltByProperties(inFeature, ref outDOMDoc, ref xmlNode, m_feedersPropertiesArray);
                break;
            }
            }
            //-------- Feature Section END related to the "infeature" --------

            // Checking the existence of the related container
            xmlNodeList      = outXMLElements.selectNodes("NodeFeature/ExternalUniqueID");
            relatedContainer = false;

            foreach (MSXML2.IXMLDOMNode node in xmlNodeList)
            {
                if (node.text == xmlNode_RelatedContainerID.nodeTypedValue.ToString())
                {
                    relatedContainer = true;
                    break;
                }
            }             // pNode

            // Creating the related container when it doesn//t already exist
            if (!relatedContainer)
            {
                xmlDrawing = outDOMDoc.createElement("NodeFeature");
                outXMLElements.appendChild(xmlDrawing);
                // Specifying its FeatureClassName
                xmlDrawing_EltTypeName = outDOMDoc.createElement("FeatureClassName");
                xmlDrawing.appendChild(xmlDrawing_EltTypeName);
                xmlDrawing_EltTypeName.nodeTypedValue = "Containers";
                // Specifying its ExternalUniqueID
                xmlDrawing_ExternalUID = outDOMDoc.createElement("ExternalUniqueID");
                xmlDrawing.appendChild(xmlDrawing_ExternalUID);
                xmlDrawing_ExternalUID.nodeTypedValue = xmlNode_RelatedContainerID.nodeTypedValue;
            }
        }
        // responds for search requests
        private void WriteSearchResponse(MSXML2.IXMLDOMNode node)
        {
            try
            {
                MSXML2.IXMLDOMNode         scope      = node.firstChild;
                MSXML2.IXMLDOMNamedNodeMap nodemap    = scope.attributes;
                MSXML2.IXMLDOMNode         childNode  = nodemap.nextNode();
                MSXML2.IXMLDOMNode         childNode2 = nodemap.nextNode();
                string scopeVal = childNode.nodeValue.ToString();
                string maskVal  = childNode2.nodeValue.ToString();

                // make sure that search request has criteria specified in it
                if (0 != scope.nodeName.CompareTo("scope"))
                {
                    return;
                }

                // validated that directory's existing
                if (!Directory.Exists(scopeVal.Substring(0, scopeVal.LastIndexOf("\\") + 1)))
                {
                    throw new Exception("Directory does not exists any more");
                }

                MSXML2.IXMLDOMDocument document     = CreateDocument();
                MSXML2.IXMLDOMElement  responseElem = document.createElement("response");
                responseElem.setAttribute("type", "SHOWFILES");

                int i = 0;
                // get files in the specified directory satisfying the
                // given criteria
                string[] files = Directory.GetFiles(scopeVal.Substring(0, scopeVal.LastIndexOf("\\") + 1), scopeVal.Substring(scopeVal.LastIndexOf("\\") + 1));
                files.Initialize();

                while (i < files.Length)
                {
                    // make fileinfo elements and fill then up with
                    // required
                    MSXML2.IXMLDOMElement file_infoElem = document.createElement("fileinfo");
                    file_infoElem.setAttribute("filename", files[i]);
                    file_infoElem.setAttribute("mask", maskVal);
                    file_infoElem.setAttribute("filesize", Convert.ToString(new FileInfo(files[i]).Length));
                    ++i;
                    // add them to response element as children;
                    responseElem.appendChild(file_infoElem);
                }

                // get files in the specified directory satisfying the
                // given criteria
                string[] dirs = Directory.GetDirectories(scopeVal.Substring(0, scopeVal.LastIndexOf("\\") + 1), scopeVal.Substring(scopeVal.LastIndexOf("\\") + 1));
                dirs.Initialize();

                i = 0;
                while (i < dirs.Length)
                {
                    // make fileinfo elements and fill then up with
                    // required
                    MSXML2.IXMLDOMElement file_infoElem = document.createElement("fileinfo");
                    file_infoElem.setAttribute("filename", dirs[i] + "\\");
                    file_infoElem.setAttribute("mask", maskVal);
                    ++i;

                    // add them to response element as children;
                    responseElem.appendChild(file_infoElem);
                }
                // close and save the document
                SaveAndCloseDocument(responseElem, document);
            }
            catch (Exception e) { WriteErrorResponse(e.Message); }
        }