C #-detailed description of XML operation Code examples

Write an XML operation class, including reading, inserting, modifying, and deleting. Write an XML operation class, including reading, inserting, modifying, and deleting.

Using System; using System. data; using System. configuration; using System. web; using System. web. security; using System. web. UI; using System. web. UI. webControls; using System. web. UI. webControls. webParts; using System. web. UI. htmlControls; using System. xml; namespace PuTianCheng {////// Summary of XmlHelper ///Public class XmlHelper {public XmlHelper (){}////// Read data //////Path///Node///Attribute name. this attribute value is returned if it is not null. Otherwise, a series value is returned.///
 
  
String
 /*************************************** * *********** Use the display column: * XmlHelper. read (path, "/Node", "") * XmlHelper. read (path, "/Node/Element [@ Attribute = 'name']", "Attribute ") **************************************** * ******/public static string Read (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 ;}////// Insert data //////Path///Node///Element name. if it is not Null, a new element is inserted. Otherwise, an attribute is inserted in the element.///Attribute name. if it is not null, the attribute value of this element is inserted. Otherwise, the element value is inserted.///Value///
 /*************************************** * *********** Use the display column: * XmlHelper. insert (path, "/Node", "Element", "", "Value") * XmlHelper. insert (path, "/Node", "Element", "Attribute", "Value") * XmlHelper. insert (path, "/Node", "", "Attribute", "Value ") **************************************** * ******/public static void Insert (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 {}}////// Modify data //////Path///Node///Attribute name. if it is not null, the attribute value of the node is modified. Otherwise, the node value is modified.///Value///
 /*************************************** * *********** Use the display column: * XmlHelper. insert (path, "/Node", "", "Value") * XmlHelper. insert (path, "/Node", "Attribute", "Value ") **************************************** * ******/public static void Update (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 {}}////// Delete data //////Path///Node///Attribute name. if it is not null, the node attribute value is deleted. Otherwise, the node value is deleted.///Value///
 /*************************************** * *********** Use the display column: * XmlHelper. delete (path, "/Node", "") * XmlHelper. delete (path, "/Node", "Attribute ") **************************************** * ******/public static void Delete (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 {}}}}

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XmlFile. xml:

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Usage:

String xml = Server. mapPath ("XmlFile. xml "); // Insert element // XmlHelper. insert (xml, "/Root", "Studio", "", ""); // Insert element/attribute // XmlHelper. insert (xml, "/Root/Studio", "Site", "Name", "path Studio"); // XmlHelper. insert (xml, "/Root/Studio", "Site", "Name", "clove fish Studio"); // XmlHelper. insert (xml, "/Root/Studio", "Site", "Name", "May software"); // XmlHelper. insert (xml, "/Root/Studio/Site [@ Name = '2014 software]", "Master", "", "May "); // Insert attributes // XmlHelper. insert (xml, "/Root/Studio/Site [@ Name = 'pathons']", "", "Url", "http://www.wzlu.com/"); // XmlHelper. insert (xml, "/Root/Studio/Site [@ Name = 'clove fish studio']", "", "Url", "http://www.luckfish.net/"); // XmlHelper. insert (xml, "/Root/Studio/Site [@ Name = 'May software]", "", "Url", "http://www.vs2005.com.cn /"); // modify the element value // XmlHelper. update (xml, "/Root/Studio/Site [@ Name = '2014 software]/Master", "", "Wuyue"); // modify the attribute value // XmlHelper. update (xml, "/Root/Studio/Site [@ Name = 'May software]", "Url", "http://www.vs2005.com.cn/"); // XmlHelper. update (xml, "/Root/Studio/Site [@ Name = '2014 software]", "Name", "MaySoft"); // read the element value // Response. write ("
"+ XmlHelper. Read (xml,"/Root/Studio/Site/Master "," ") +"
"); // Read the property value // Response. Write ("
"+ XmlHelper. Read (xml,"/Root/Studio/Site "," Url ") +"
"); // Read the specific property value // Response. Write ("
"+ XmlHelper. Read (xml,"/Root/Studio/Site [@ Name = 'clove fish studio'] "," Url ") +"
"); // Delete attributes // XmlHelper. delete (xml, "/Root/Studio/Site [@ Name = 'xiaolu Studio ']", "Url"); // Delete element // XmlHelper. delete (xml, "/Root/Studio ","");

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