XmlDocument扩展类
asp.net常用xml操作类:
代码如下
/// <summary> /// XmlDocument扩展类 /// </summary> public class XmlHelper { public XmlHelper() { } /// <summary> /// 读取数据(返回一个字段) /// </summary> /// <param name="path">路径</param> /// <param name="node">节点</param> /// <param name="attribute">属性名,非空时返回该属性值,否则返回串联值</param> /// <returns></returns> /// 使用示例 /// XmlHelper.XmlRead(path,"/Node","") /// XmlHelper.XmlRead(path,"/Node/Element[@Attribute='Name']","Attribute") public static string XmlRead(string path, string node, string attribute) { string value = ""; try { XmlDocument doc = new XmlDocument(); doc.Load(path); XmlNode xn = doc.SelectSingleNode(node); value = (attribute.Equals("") ? xn.InnerText : xn.Attributes[attribute].Value); } catch { } return value; } /// <summary> /// 读取数据(返回一个DataSet) /// </summary> /// <param name="path"></param> /// <returns></returns> public static DataSet XmlRead(string path) { DataSet ds = new DataSet(); ds.ReadXml(path); return ds; } /// <summary> /// 插入数据 /// </summary> /// <param name="path">路径</param> /// <param name="node">节点</param> /// <param name="element">元素名,非空时插入新元素,否则在该元素中插入属性</param> /// <param name="attribute">属性名,非空时插入该元素属性值,否则插入元素值</param> /// <param name="value">值</param> /// 使用示列 /// XmlHelper.XmlInsert(path, "/Node", "Element", "", "Value") /// XmlHelper.XmlInsert(path, "/Node", "Element", "Attribute", "Value") /// XmlHelper.XmlInsert(path, "/Node", "", "Attribute", "Value") public static void XmlInsert(string path, string node, string element, string attribute, string value) { try { XmlDocument doc = new XmlDocument(); doc.Load(path); XmlNode xn = doc.SelectSingleNode(node); if (element.Equals("")) { if (!attribute.Equals("")) { XmlElement xe = (XmlElement)xn; xe.SetAttribute(attribute, value); } } else { XmlElement xe = doc.CreateElement(element); if (attribute.Equals("")) xe.InnerText = value; else xe.SetAttribute(attribute, value); xn.AppendChild(xe); } doc.Save(path); } catch { } } /// <summary> /// 修改数据 /// </summary> /// <param name="path">路径</param> /// <param name="node">节点</param> /// <param name="attribute">属性名,非空时修改该节点属性值,否则修改节点值</param> /// <param name="value">值</param> /// 使用示列 /// XmlHelper.XmlUpdate(path, "/Node", "", "Value") /// XmlHelper.XmlUpdate(path, "/Node", "Attribute", "Value") public static void XmlUpdate(string path, string node, string attribute, string value) { try { XmlDocument doc = new XmlDocument(); doc.Load(path); XmlNode xn = doc.SelectSingleNode(node); XmlElement xe = (XmlElement)xn; if (attribute.Equals("")) xe.InnerText = value; else xe.SetAttribute(attribute, value); doc.Save(path); } catch { } } /// <summary> /// 删除数据 /// </summary> /// <param name="path">路径</param> /// <param name="node">节点</param> /// <param name="attribute">属性名,非空时删除该节点属性值,否则删除节点值</param> /// XmlHelper.XmlDelete(path, "/Node", "") /// XmlHelper.XmlDelete(path, "/Node", "Attribute") public static void XmlDelete(string path, string node, string attribute) { try { XmlDocument doc = new XmlDocument(); doc.Load(path); XmlNode xn = doc.SelectSingleNode(node); XmlElement xe = (XmlElement)xn; if (attribute.Equals("")) xn.ParentNode.RemoveChild(xn); else xe.RemoveAttribute(attribute); doc.Save(path); } catch { } } }