C#- XPath教程

　　XPATH在查找XML文挡里的元素灵活而且强大。

　　今天是我第一次用XPATH，其实我几乎都不会XPATH的写法。百度后在网上找到这个网址，里面有祥细的讲解

　　XPATH教程地址：http://www.zvon.org/xxl/XPathTutorial/Output_chi/

备忘一下，C#代码：

读取

            XmlDocument xmlDoc = new XmlDocument();

            string configStr = Application.ExecutablePath.Remove(Application.ExecutablePath.LastIndexOf('\\')) + "\\app.config";

            xmlDoc.Load(configStr);



            XmlElement elmConnectionStr = (XmlElement)xmlDoc.SelectSingleNode(@"//add[@key='ConnectionStr']");

            txtConnectionStr.Text = elmConnectionStr.GetAttribute("value");



            XmlElement elmDataType = (XmlElement)xmlDoc.SelectSingleNode(@"//add[@key='DataType']");

            cbbDataType.SelectedItem = elmDataType.GetAttribute("value");



            XmlElement elmNamespace = (XmlElement)xmlDoc.SelectSingleNode(@"//add[@key='Namespace']");

            txtNamespace.Text = elmNamespace.GetAttribute("value");



            XmlElement elmPrefix = (XmlElement)xmlDoc.SelectSingleNode(@"//add[@key='Prefix']");

            txtPrefix.Text = elmPrefix.GetAttribute("value");



            XmlElement elmOutputPath = (XmlElement)xmlDoc.SelectSingleNode(@"//add[@key='OutputPath']");

            txtOutpurtStr.Text = elmOutputPath.GetAttribute("value");

 

修改

            XmlDocument xmlDoc = new XmlDocument();

            string configStr = Application.ExecutablePath.Remove(Application.ExecutablePath.LastIndexOf('\\')) + "\\app.config";

            xmlDoc.Load(configStr);



            XmlElement elmOutputPath = (XmlElement)xmlDoc.SelectSingleNode(@"//add[@key='OutputPath']");

            elmOutputPath.SetAttribute("value", "123");

            xmlDoc.Save(configStr);