Read the configuration file-AppConfig, configuration file-appconfig

Read the configuration file-AppConfig, configuration file-appconfig

Using System. xml; using System. IO; using System; namespace Framework. common {/// <summary> /// used to obtain or set the Web. config /*. exe. auxiliary class of node data in config /// </summary> public sealed class AppConfig {private string filePath; /// <summary> /// retrieve the Web from the current directory in sequence. config and *. app. config file. /// If one is found, use it as the configuration file; otherwise, an ArgumentNullException exception is thrown. /// </Summary> public AppConfig () {string webconfig = Path. combine (AppDomain. currentDomain. baseDirectory, "Web. config "); string appConfig = AppDomain. currentDomain. setupInformation. configurationFile. replace (". vshost "," "); if (File. exists (webconfig) {filePath = webconfig;} else if (File. exists (appConfig) {filePath = appConfig;} else {throw new ArgumentNullException ("no Web found. config file or application configuration Set file, please specify the configuration file ");}} /// <summary> /// specify the specific configuration file path /// </summary> /// <param name = "configFilePath"> Configuration File Path (absolute path)) public AppConfig (string configFilePath) {filePath = configFilePath ;} /// <summary> /// set the config file of the program /// </summary> /// <param name = "keyName"> key name /// <param name = "keyValue"> key value public void AppConfigSet (string keyName, string keyValue) {// because multiple Add key values exist, the operation to access the deleetting operation is unsuccessful. Therefore, comment the following statement and use the new method. /* String xpath = "// add [@ key = '" + keyName + "']"; XmlDocument document = new XmlDocument (); document. load (filePath); XmlNode node = document. selectSingleNode (xpath); node. attributes ["value"]. value = keyValue; document. save (filePath); */XmlDocument document = new XmlDocument (); document. load (filePath); XmlNodeList nodes = document. getElementsByTagName ("add"); for (int I = 0; I <nodes. count; I ++) {// Obtain the key attribute XmlAttribute = nodes [I] of the current element. attributes ["key"]; // determines whether the current element is the target element if (attribute! = Null & (attribute. value = keyName) {attribute = nodes [I]. attributes ["value"]; // assign an if (attribute! = Null) {attribute. value = keyValue; break ;}} document. save (filePath) ;}//< summary> /// read the key value of the config file of the program. /// If the key name does not exist, return NULL // </summary> /// <param name = "keyName"> key name // <returns> </returns> public string AppConfigGet (string keyName) {string strReturn = string. empty; try {XmlDocument document = new XmlDocument (); document. load (filePath); XmlNodeList nodes = document. getElementsByTagName ("add"); for (int I = 0; I <nodes. count; I ++) {// obtain the key attribute XmlAttribute = nodes [I] of the current element. attributes ["key"]; // Determine whether the current element is the target element if (attribute! = Null & (attribute. Value = keyName) {attribute = nodes [I]. Attributes ["value"]; if (attribute! = Null) {strReturn = attribute. value; break ;}}} catch {;} return strReturn ;} /// <summary> /// obtain the value of the subitem in the specified key name /// </summary> /// <param name = "keyName"> key name /// <param name = "subKeyName"> use a semicolon (;) the subitem name that is the separator // The value of the <returns> corresponding subitem name (that is, the value after the = sign) </returns> public string GetSubValue (string keyName, string subKeyName) {string connectionString = AppConfigGet (keyName ). toLower (); string [] item = connectionStrin G. split (new char [] {';'}); for (int I = 0; I <item. length; I ++) {string itemValue = item [I]. toLower (); if (itemValue. indexOf (subKeyName. toLower ()> = 0) // if it contains the specified keyword {int startIndex = item [I]. indexOf ("="); // return item [I] at the beginning of the equal sign. substring (startIndex + 1); // obtain the Value after the equal sign as Value} return string. empty ;}# region common configuration item attributes /// <summary> /// obtain the permission system link from the configuration file (value of the configuration item HWSecurity) /// </summary> public st Ring HWSecurity {get {return AppConfigGet ("HWSecurity") ;}/// <summary> // System ID (value of System_ID) /// </summary> public string System_ID {get {return AppConfigGet ("System_ID ");}} /// <summary> /// Application name (value of the configuration item ApplicationName) /// </summary> public string AppName {get {return AppConfigGet ("ApplicationName ");}} /// <summary> /// software vendor name (value of configuration item Manufacturer) /// </summary> public string M Anufacturer {get {return AppConfigGet ("Manufacturer ");}} /// <summary> /// set the database link address of the Enterprise Library in the config file of the program. /// </summary> /// <param name = "keyName"> key name /// <param name = "keyValue"> key value public void SetConnectionString (string keyName, string keyValue) {XmlDocument document = new XmlDocument (); document. load (filePath); XmlNodeList nodes = document. getElementsByTagName ("add"); for (int I = 0; I <nodes. count; I ++) {// obtain the name attribute XmlAttribute att = nodes [I] of the current element. attributes ["name"]; // determines whether the current element is the target element if (att! = Null & (att. Value = keyName) {att = nodes [I]. Attributes ["connectionString"]; if (att! = Null) {att. value = keyValue; break ;}} document. save (filePath );} /// <summary> /// read the database link address of the Enterprise Library in the config file of the program /// </summary> /// <param name = "keyName"> key name /// <returns> </returns> public string GetConnectionString (string keyName) {string strReturn = string. empty; try {XmlDocument document = new XmlDocument (); document. load (filePath); XmlNodeList nodes = document. getElementsByTag Name ("add"); for (int I = 0; I <nodes. count; I ++) {// obtain the key attribute XmlAttribute att = nodes [I] of the current element. attributes ["name"]; // determines whether the current element is the target element if (att! = Null & (att. Value = keyName) {att = nodes [I]. Attributes ["connectionString"]; if (att! = Null) {strReturn = att. value; break ;}}} catch {;} return strReturn ;} /// <summary> /// obtain database configuration information /// </summary> /// <param name = "keyName"> node name /// <returns> </returns> public DatabaseInfo GetDatabaseInfo (string keyName) {string connectionString = GetConnectionString (keyName); return new DatabaseInfo (connectionString );} /// <summary> /// set database configuration information /// </summary> /// <param name = "keyName"> /// <param name = "databaseInfo "> public void SetDatabaseInfo (string keyName, databaseInfo databaseInfo) {SetConnectionString (keyName, databaseInfo. connectionString) ;}# endregion }}