c#编写的蓝牙通讯程序源码.rar

using System; using System.Xml; using System.IO; using System.Collections; using OpenNETCF; namespace OpenNETCF.Diagnostics { /// <summary> /// Implements writting to the event log using XML /// </summary> public class XMLEventLogWritter:IEventLogWritter { public event EntryWrittenEventHandler EntryWritten; public event EventHandler EventLogCollectionUpdated; private string source=""; private string log=""; private string logFileName=""; private string logPath=""; private string logDisplayName=""; private EventLogEntryCollection eventLogEntryCollection = new EventLogEntryCollection(); private ArrayList eventLogCollection = null; /// <summary> /// The Xml document representing the log /// </summary> private XmlDocument xmlLog=null; /// <summary> /// The current eventlog node which contains all Log nodes /// </summary> private XmlNode nodeEventLog = null; /// <summary> /// The current log node that is being written to /// </summary> private XmlNode nodeLog = null; /// <summary> /// The default Xml for a new log /// </summary> private readonly string EVENTLOG_ROOT = "<eventLog></eventLog>"; internal XMLEventLogWritter(string log, string source, string logPath, string logFileName) { this.log = log; this.source = source; this.logPath = logPath; this.logFileName = logFileName; this.InitializeLogFile(); } #region Private Methods /// <summary> /// Creates the XML document to store the event logs /// </summary> private void InitializeLogFile() { //Create the log file this.CreateLogFile(); //Load the nodes this.LoadNodes(); //Save the file this.SaveLogFile(); //Load the eventLogEntryColelction this.LoadEventLogEntryCollection(); } /// <summary> /// Loads the eventlog collection /// </summary> private void LoadEventLogCollection() { XmlNodeList list = this.xmlLog.GetElementsByTagName("log"); this.eventLogCollection = new ArrayList(); foreach(XmlNode node in list) { string log = this.NodeAttributeValue(node,"name"); if(log.Length>0) { eventLogCollection.Add(new EventLog(log,"",this.logPath,this.logFileName, EventLogWritterType.XML)); } } } /// <summary> /// Creates a log file on the system /// </summary> private void CreateLogFile() { //Create a new log file this.xmlLog = new XmlDocument(); //Check to see if the file exists if(File.Exists(this.logPath+this.logFileName)) { //The file is available so load it into the XML try { this.xmlLog.Load("file://"+this.logPath+this.logFileName); } catch(Exception e) { throw new Exception("Unable to open log file as XML!!",e); } } else { //The file does not exist so load the default XML this.xmlLog.LoadXml(this.EVENTLOG_ROOT); } } /// <summary> /// Loads the source, log and EventLog nodes /// </summary> private void LoadNodes() { //Get the event Log node this.nodeEventLog = this.xmlLog.GetElementsByTagName("eventLog")[0]; //Get the current log node this.nodeLog = this.EventLogNode(this.log); if(this.nodeLog==null) { //Create the log node this.nodeLog = this.CreateLogNode(this.log); } //Set the log display name this.logDisplayName = this.NodeAttributeValue(nodeLog,"logDisplayName"); } /// <summary> /// Loads the eventlog entry collection /// </summary> private void LoadEventLogEntryCollection() { //This is only called when the log is changed and when the class is instantiated so it's pretty safe //to re-init the collection this.eventLogEntryCollection = new EventLogEntryCollection(); string[] attributes = new string[]{"machineName","userName","timeGenerated", "source","message","eventLogEntryType", "eventID","category","rawData","id","timeWritten","index"}; //Get all the eventLog nodes foreach(XmlNode node in this.nodeLog.ChildNodes) { string machineName = node.Attributes.GetNamedItem(attributes[0]).Value; string userName = node.Attributes.GetNamedItem(attributes[1]).Value; DateTime timeGenerated = DateTime.Parse(node.Attributes.GetNamedItem(attributes[2]).Value); string source = node.Attributes.GetNamedItem(attributes[3]).Value; string message = node.Attributes.GetNamedItem(attributes[4]).Value; EventLogEntryType type = (EventLogEntryType)Int32.Parse(node.Attributes.GetNamedItem(attributes[5]).Value); int eventID = Int32.Parse(node.Attributes.GetNamedItem(attributes[6]).Value); short category = Int16.Parse(node.Attributes.GetNamedItem(attributes[7]).Value); byte[] rawData = System.Text.Encoding.Unicode.GetBytes(node.Attributes.GetNamedItem(attributes[8]).Value); string id = node.Attributes.GetNamedItem(attributes[9]).Value; DateTime timeWritten = DateTime.Parse(node.Attributes.GetNamedItem(attributes[10]).Value); int index = Int32.Parse(node.Attributes.GetNamedItem(attributes[11]).Value); //Add to the collection EventLogEntry eventLogEntry = new EventLogEntry(category,rawData,type,eventID,index,machineName,message,source,timeGenerated,timeWritten,userName,id); this.eventLogEntryCollection.Add(eventLogEntry); } } /// <summary> /// Create the log node and adds it to the nodeEventLog /// </summary> private XmlNode CreateLogNode(string logName) { XmlNode newNode = this.xmlLog.CreateNode(XmlNodeType.Element,"log",""); XmlAttribute att = this.xmlLog.CreateAttribute("name"); att.Value = this.log; newNode.Attributes.Append(att); att = this.xmlLog.CreateAttribute("logDisplayName"); att.Value = this.logDisplayName; newNode.Attributes.Append(att); this.nodeEventLog.AppendChild(newNode); return newNode; } /// <summary> /// Retrieves and event log node by logName /// </summary> /// <param name="logName">The name of the log node</param> /// <returns>The XmlNode containing the log items or null if not found</returns> private XmlNode EventLogNode(string logName) { XmlNodeList list = this.xmlLog.GetElementsByTagName("log"); foreach(XmlNode node in list) { XmlAttribute att = (XmlAttribute)node.Attributes.GetNamedItem("name"); if(att!=null) if(att.Value == logName) return node; } //Return null; return null; } /// <summary> /// Changes an attribute in the specified node /// </summary> private void NodeAttributeValue(XmlNode node, string attributeName, string newAttributeValue) { XmlAttribute att = (XmlAttribute)node.Attributes.GetNamedItem(attributeName); if(att!=null) { att.Value = newAttributeValue; this.SaveLogFile(); } else throw new Exception("Attribute " + attributeName + " not found in node \"" + node.Name + "\""); } /// <summary> /// Retreives the attribute in the specified node /// </summary> /// <param name="node"></param> /// <param name="attName"></param> /// <returns>The value of the attribute or null if not found</returns> private string NodeAttributeValue(XmlNode node, string attributeName) { XmlAttribute att = (XmlAttribute)node.Attributes.GetNamedItem(attributeName); if(att!=null) return att.Value; else return ""; } /// <summary> /// Saves the logfile /// </summary> private void SaveLogFile() { this.xmlLog.Save(this.LogPath+this.LogFileName); } /// <summary> /// Writes an entry to the log file /// </summary> /// <param name="source"></param> /// <param name="message"></param> /// <param name="type"></param> /// <param name="eventID"></param> /// <param name="category"></param> /// <param name="rawData"></param> private vo