能用在两种项目中,比较不错
using System;
using System.Configuration;
using System.Reflection;
using System.Web;
using System.Xml;
public enum ConfigFileType
{
WebConfig,
AppConfig
}
namespace TexSelect
{
/**//**//**//// <summary>
/// 配置文件操作类
/// </summary>
public class AppConfig : AppSettingsReader
{
public string docName = String.Empty;
private XmlNode node=null;
private int _configType;
public int ConfigType
{
get{ return _configType; }
set{ _configType=value; }
}
public bool SetValue(string key, string value)
{
XmlDocument cfgDoc = new XmlDocument();
loadConfigDoc(cfgDoc);
// retrieve the appSettings node
node = cfgDoc.SelectSingleNode("//appSettings");
if( node == null )
{
throw new InvalidOperationException( "appSettings section not found");
}
try
{
// XPath select setting "add" element that contains this key
XmlElement addElem= (XmlElement)node.SelectSingleNode("//add[@key='" +key +"']") ;
if(addElem!=null)
{
addElem.SetAttribute("value",value);
}
// not found, so we need to add the element, key and value
else
{
XmlElement entry = cfgDoc.CreateElement("add"); entry.SetAttribute("key",key); entry.SetAttribute("value",value); node.AppendChild(entry);
}
//save it
saveConfigDoc(cfgDoc,docName);
return true;
}
catch
{
return false;
}
}
private void saveConfigDoc(XmlDocument cfgDoc,string cfgDocPath)
{
try
{
XmlTextWriter writer = new XmlTextWriter( cfgDocPath , null );
writer.Formatting = Formatting.Indented;
cfgDoc.WriteTo( writer );
writer.Flush();
writer.Close();
return;
}
catch
{
throw;
}
}
public bool removeElement ( string elementKey)
{
try
{
XmlDocument cfgDoc = new XmlDocument();
loadConfigDoc(cfgDoc);
// retrieve the appSettings node
node = cfgDoc.SelectSingleNode("//appSettings");
if( node == null )
{
throw new InvalidOperationException( "appSettings section not found");
}
// XPath select setting "add" element that contains this key to remove
node.RemoveChild( node.SelectSingleNode("//add[@key='" +elementKey +"']") );
saveConfigDoc(cfgDoc,docName);
return true;
}
catch
{
return false;
}
}
private XmlDocument loadConfigDoc( XmlDocument cfgDoc )
{
// load the config file
if( Convert.ToInt32(ConfigType)==Convert.ToInt32(ConfigFileType.AppConfig))
{
docName= ((Assembly.GetEntryAssembly()).GetName()).Name;
docName += ".exe.config";
}
else
{
docName=HttpContext.Current.Server.MapPath("web.config");
}
cfgDoc.Load( docName );
return cfgDoc;
}
}
} 使用方法:
string sqlConnText="";
AppConfig appconfig=new AppConfig();
appconfig.ConfigType=(int)ConfigFileType.WebConfig;
sqlConnText=(string)appconfig.GetValue("SQLConnectionString",sqlConnText.GetType()); 设置方法:
项目为web项目,则配置信息存在web.config文件中,使用时:appconfig.ConfigType=(int)ConfigFileType.WebConfig;
项目为win项目,则配置信息存在app.config文件中,使用时:appconfig.ConfigType=(int)ConfigFileType.AppConfig;
配置文件示例:
不论在web.config中还是在app.config中都放在<configuration></configuration>之间,格式如下:
<appSettings>
<add key="SQLConnectionString" value="Server=127.0.0.1;database=tex;uid=sa;pwd=sa" />
</appSettings>