主要是以字符串的形式来读取xml,然后通过遍历读取节点，通过节点属性名称获取属性值
/// <summary>
/// 初始化OPC参数配置 /// </summary> /// <returns></returns> public static OCPParamsDefine InitOPCParamsConfig() { OCPParamsDefine _OCPParamsDefine = null; ; byte[] buffer = Encoding.GetEncoding("GB2312").GetBytes(OPCClientResource.OPCClientParams); MemoryStream ms = new MemoryStream(); ms.Write(buffer, 0, buffer.Length); ms.Position = 0; XmlTextReader xmlReader = new XmlTextReader(ms); _OCPParamsDefine= LoadFromXml(xmlReader); xmlReader.Close(); return _OCPParamsDefine; }/// <summary>
/// 从xml文件加载配置 /// </summary> /// <param name="xmlReader">xml文档</param> static OCPParamsDefine LoadFromXml(XmlTextReader xmlReader) { xmlReader.WhitespaceHandling = WhitespaceHandling.None; while (xmlReader.Read()) { if (xmlReader.NodeType == XmlNodeType.Element && string.Compare(xmlReader.Name, "OPCServerParam", true) == 0) { OCPParamsDefine _OCPParamsDefine = new OCPParamsDefine(); if (!xmlReader.IsEmptyElement) { xmlReader.Read(); int beginNodeDepth = xmlReader.Depth; do { if (xmlReader.NodeType == XmlNodeType.Element) { if (string.Compare(xmlReader.Name, "Groups", true) == 0) { string groupsName=xmlReader.GetAttribute("Name"); _OCPParamsDefine.GroupsName = groupsName; // OCPParamsDefine _OCPParamsDefine = new OCPParamsDefine(groupsName); do { xmlReader.Read(); if (xmlReader.NodeType == XmlNodeType.Element) { if ((string.Compare(xmlReader.Name, "Group", true) == 0)) { do { string groupName=xmlReader.GetAttribute("Name"); Group group = new Group(groupName) { GroupsName=groupsName}; group.Items = GetItems(xmlReader, groupName, groupsName);//获取组下的每一项_OCPParamsDefine.Groups.Add(group);
xmlReader.Skip(); } while (!xmlReader.EOF); } } // xmlReader.Skip(); } while (!xmlReader.EOF); } } // xmlReader.Skip(); } while (beginNodeDepth == xmlReader.Depth && !xmlReader.EOF); } return _OCPParamsDefine; // break; } } return null; }static List<Item> GetItems(XmlTextReader xmlReader, string groupName, string groupsName)
{ List<Item> items = new List<Item>(); xmlReader.Read(); if (xmlReader.NodeType == XmlNodeType.Element) { if ((string.Compare(xmlReader.Name, "Items", true) == 0)) { do { xmlReader.Read(); if (xmlReader.NodeType == XmlNodeType.Element) { if ((string.Compare(xmlReader.Name, "Item", true) == 0)) { string itemName = xmlReader.GetAttribute("Name"); int clientHandler = Convert.ToInt32(xmlReader.GetAttribute("ClientHandler")); Item item = new Item() { GroupsName=groupsName,GroupName = groupName, _Item = itemName, ClientHandler = clientHandler }; items.Add(item); // group.Items.Add(item); } } // xmlReader.Skip(); } while (!xmlReader.EOF); } } return items; }