public class XmlControl:Object
{
protected string strXmlFile;
protected XmlDocument objXmlDoc = new XmlDocument();
public XmlControl(string XmlFile, Boolean bOverWrite, string sRoot)
{
try
{
//如果覆盖模式，则强行创建一个xml文档
                if (bOverWrite)
{
objXmlDoc.AppendChild(objXmlDoc.CreateXmlDeclaration("1.0", "gb2312", null));//设置xml的版本，格式信息
                    objXmlDoc.AppendChild(objXmlDoc.CreateElement("", sRoot, ""));//创建根元素
                    objXmlDoc.Save(XmlFile);//保存
                }
else //否则，检查文件是否存在，不存在则创建
                {
if (!(File.Exists(XmlFile)))
{
objXmlDoc.AppendChild(objXmlDoc.CreateXmlDeclaration("1.0", "gb2312", null));
objXmlDoc.AppendChild(objXmlDoc.CreateElement("", sRoot, ""));
objXmlDoc.Save(XmlFile);
}
}
objXmlDoc.Load(XmlFile);
}
catch (System.Exception ex)
{
throw ex;
}
strXmlFile = XmlFile;
}
public DataView GetData(string XmlPathNode)
{
//查找数据。返回一个DataView
            DataSet ds = new DataSet();
try
{
StringReader read = new StringReader(objXmlDoc.SelectSingleNode(XmlPathNode).OuterXml);
ds.ReadXml(read);
return ds.Tables[0].DefaultView;
}
catch
{
return null;
}
}
public void UpdateNode(string xmlPathNode, string content)
{
//更新节点內容,如果多个相同的节点,则更新第一个节点
            objXmlDoc.SelectSingleNode(xmlPathNode).InnerText = content;
}
public void UpdateNode(string xmlPathNode, string[] arrAttribName, string[] arrAttribContent, string content)
{
//更新节点,带属性和内容
//修改内容
            objXmlDoc.SelectSingleNode(xmlPathNode).InnerText = content;
//修改属性
            for (int i = 0; i <= arrAttribName.GetUpperBound(0); i++)
{
objXmlDoc.SelectSingleNode(xmlPathNode).Attributes[i].Value = arrAttribContent[i];
}
}
public void DeleteNode(string Node)
{
//刪除一个节点。
            try
{
string mainNode = Node.Substring(0, Node.LastIndexOf("/"));
objXmlDoc.SelectSingleNode(mainNode).RemoveChild(objXmlDoc.SelectSingleNode(Node));
}
catch {
//throw;   
                return;
}
}
public void InsertNode(string mainNode, string ChildNode, string Element, string Content)
{
//插入一节点和此节点的一子节点。
            XmlNode objRootNode = objXmlDoc.SelectSingleNode(mainNode);
XmlElement objChildNode = objXmlDoc.CreateElement(ChildNode);
objRootNode.AppendChild(objChildNode);//插入节点
            XmlElement objElement = objXmlDoc.CreateElement(Element);
objElement.InnerText = Content;
objChildNode.AppendChild(objElement);//插入子节点
        }
public void InsertNode(string mainNode, string Element, string Attrib, string AttribContent, string Content)
{
//插入一个节点，带一属性。
            XmlNode objNode = objXmlDoc.SelectSingleNode(mainNode);
XmlElement objElement = objXmlDoc.CreateElement(Element);
objElement.SetAttribute(Attrib, AttribContent);
objElement.InnerText = Content;
objNode.AppendChild(objElement);
}
public void InsertNode(string mainNode, string Element, string Content)
{
//插入一个节点，不带属性。
            XmlNode objNode = objXmlDoc.SelectSingleNode(mainNode);
XmlElement objElement = objXmlDoc.CreateElement(Element);
objElement.InnerText = Content;
objNode.AppendChild(objElement);
}
public void InsertNode(string mainNode, string elementName, string[] arrAttributeName, string[] arrAttributeContent, string elementContent)
{
XmlNode objNode = objXmlDoc.SelectSingleNode(mainNode);
XmlElement objElement = objXmlDoc.CreateElement(elementName);
for (int i = 0; i <= arrAttributeName.GetUpperBound(0); i++)
{
objElement.SetAttribute(arrAttributeName[i], arrAttributeContent[i]);
}
objElement.InnerText = elementContent;
objNode.AppendChild(objElement);
}
public void Save()
{
//保存文档。
            try
{
objXmlDoc.Save(strXmlFile);
}
catch (System.Exception ex)
{
throw ex;
}
objXmlDoc = null;
}
}