Fun App. Config

During Winform development, some configuration information is inevitably written to the APP. in the CONFIG file, after the program is generated, the APP. CONFIG is changed to A file with the program name + CONFIG. For example, if the program name is A, the generated APP. the CONFIG file will become. EXE. CONFIG file!

Directly add the code without explanation:

/// <Summary>
/// Configuration type
/// </Summary>
Public enum configType {etettings, connectionStrings}
 
Public static string GetConfig (configType cType, string keyOrName)
{
String result = string. Empty;
If (cType = configType. appSettings) result = System. Configuration. ConfigurationManager. etettings [keyOrName];
Else if (System. Configuration. ConfigurationManager. ConnectionStrings [keyOrName]! = Null)
Result = System. Configuration. ConfigurationManager. ConnectionStrings [keyOrName]. ConnectionString;
 
Return result = null? String. Empty: result;
}
/// <Summary>
/// Read the application configuration value. If no corresponding item exists, String. Empty is returned.
/// </Summary>
/// <Param name = "key"> Configure the ID code </param>
/// <Returns> </returns>
Public static string getdeleetask( string key)
{
Return GetConfig (configType. receivettings, key );
}
/// <Summary>
/// Modify or create a configuration item www.2cto.com
/// </Summary>
/// <Param name = "key"> Configure the ID code </param>
/// <Param name = "val"> configuration item value </param>
Public static void SetAppSettings (string key, string val)
{
SetConfig (configType. appSettings, key, val );
}
Public static void SetConfig (configType cType, string keyOrName, string val) // you can specify two parameters: the configuration file key name and the value of the key.
{
Try
{
XmlDocument xDoc = new XmlDocument (); // defines XmlDocument. This class is generally used to operate xml.
String path = biovision. ihosppath. his. dbCommon. db. configFilePath; // obtain the absolute path of the App. config file.
// String str = System. AppDomain. CurrentDomain. SetupInformation. ApplicationBase; // This is the path for obtaining the configuration file
// Str = str. Substring (0, str. Length-10) + "App. config"; // This is the name of the configuration file.
 
 
XDoc. Load (path); // read xml
XmlNode xNode; // xml Node
XmlElement xElemCurrent; // xml Element
XmlElement xElemNew; // xml Element
If (cType = configType. connectionStrings)
{
XNode = xDoc. SelectSingleNode ("// connectionStrings ");
XElemCurrent = (XmlElement) xNode. SelectSingleNode ("// add [@ name = '" + keyOrName + "']");
If (xElemCurrent! = Null)
XElemCurrent. SetAttribute ("connectionString", val); // assign a value to this key if it exists.
Else
{// Add a key without this key and assign a value
XElemNew = xDoc. CreateElement ("add ");
XElemNew. SetAttribute ("name", keyOrName );
XElemNew. SetAttribute ("connectionString", val );
XElemNew. SetAttribute ("providerName", "System. Data. SqlClient ");
XNode. AppendChild (xElemNew );
}
}
Else
{
XNode = xDoc. SelectSingleNode ("// appSettings ");
XElemCurrent = (XmlElement) xNode. SelectSingleNode ("// add [@ key = '" + keyOrName + "']");
If (xElemCurrent! = Null)
XElemCurrent. SetAttribute ("value", val); // assign the value to AppValue if the key exists.
Else
{// Add a key without this key and assign a value
XElemNew = xDoc. CreateElement ("add ");
XElemNew. SetAttribute ("key", keyOrName );
XElemNew. SetAttribute ("value", val );
XNode. AppendChild (xElemNew );
}
}
XDoc. Save (path );
}
Catch (Exception e)
{
Log. LogException (e, "An error occurred while writing the config configuration file. ");
}
 
}
Later, I think about it. In fact, there is another way to implement the config read/write function (which is provided by MS and may be better)

Configuration config = ConfigurationManager. OpenExeConfiguration (ConfigurationUserLevel. None );
Config. etettings. Settings [key]. Value = value;
Config. Save (ConfigurationSaveMode. Modified );
ConfigurationManager. RefreshSection ("receivettings ");

This is an excerpt from the event where you want to complain about Dongfeng ~