1 public class AppSettingManager 2 { 3 public static bool Update(string key, string value) 4 { 5 6 try 7 { 8 var config = Create(); 9 if (config == null) 10 { 11 return false; 12 } 13 var isModified = !string.IsNullOrEmpty(Get(key)); 14 if (isModified) 15 { 16 config.AppSettings.Settings.Remove(key); 17 } 18 // Add an Application Setting. 19 config.AppSettings.Settings.Add(key, value); 20 // Save the changes in App.config file. 21 config.Save(ConfigurationSaveMode.Modified); 22 // Force a reload of a changed section. 23 ConfigurationManager.RefreshSection("appSettings"); 24 return true; 25 } 26 catch (Exception) 27 { 28 return false; 29 } 30 31 } 32 33 public static bool Add(string key, string value) 34 { 35 try 36 { 37 var config = Create(); 38 if (config == null) 39 { 40 return false; 41 } 42 config.AppSettings.Settings.Add(key, value); 43 config.Save(ConfigurationSaveMode.Modified); 44 ConfigurationManager.RefreshSection("appSettings"); 45 return true; 46 } 47 catch (Exception) 48 { 49 return false; 50 51 } 52 53 } 54 55 public static string Get(string key) 56 { 57 var config = Create(); 58 if (config == null) 59 { 60 return null; 61 } 62 return config.AppSettings.Settings[key].Value; 63 } 64 65 private static Configuration Create() 66 { 67 try 68 { 69 return ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); 70 } 71 catch (Exception) 72 { 73 return null; 74 } 75 } 76 }
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原文:http://www.cnblogs.com/gaobing/p/3872830.html