轻量级Config文件AppSettings节点编辑帮助类

 1 using system.configuration;
 2 using system.windows.forms;
 3 
 4 namespace allyn.common
 5 {
 6     public class xmlheper
 7     {
 8         ///<summary> 
 9         ///返回config文件中appsettings配置节的value项  
10         ///</summary> 
11         ///<param name="strkey">节点key</param> 
12         ///<returns>值</returns> 
13         public static string getappconfig(string strkey)
14         {
15             string file = application.executablepath;
16             configuration config = configurationmanager.openexeconfiguration(file);
17 
18             foreach (string key in config.appsettings.settings.allkeys)
19             {
20                 if (key == strkey)
21                 {
22                     return config.appsettings.settings[strkey].value.tostring();
23                 }
24             }
25             return string.empty;
26         }
27 
28         ///<summary>  
29         ///在config文件中appsettings配置节增加一对键值对  
30         ///</summary>  
31         ///<param name="newkey">节点名称</param>  
32         ///<param name="newvalue">信值</param>  
33         public static void updateappconfig(string newkey, string newvalue)
34         {
35             string file = system.windows.forms.application.executablepath;
36             configuration config = configurationmanager.openexeconfiguration(file);
37 
38             bool exist = false;
39 
40             foreach (string key in config.appsettings.settings.allkeys)
41             {
42                 if (key == newkey) {  exist = true; }
43             }
44 
45             if (exist)  { config.appsettings.settings.remove(newkey); }
46 
47             config.appsettings.settings.add(newkey, newvalue);
48             config.save(configurationsavemode.modified);
49 
50             configurationmanager.refreshsection("appsettings");
51         }
52     }
53 }