为Config文件提供Application级别的设置读写

用过设置绑定的应该知道，App.Config和一个文件Settings.Setting是呼应的，开发者可以在Settings.Setting里设置各种设置项
通过设置绑定映射到控件，很多人使用它作为以前程序的配置文件（如Ini文件,注册表等）的替换，的确，设置绑定非常方便，但是设置绑定有一个不足，就是
能动态读写的设置项的Scope必须是User的，也就是说是用户别的，换个操作员身份登录操作系统，则配置不同，这也很不错，但通常设置还有一种是全局性的，譬如由
管理员设置好，其他用户不需理会，使用的时候用管理员提供的设置，通常为了实现这样的操作，必须把设置项的Scope改为Application级别的，但是Application级别的默认是
没有保存功能的，难道期望用户修改设置时去修改App.config文件？
作为深谙用户操作习惯的开发者，当然不期望这样的实现，也太不专业了，OK,本文提供一个例子，解决这个问题

ConfigUtil类，需要引用System.Configuration.dll

using Sy<a href="https://www.jb51.cc/tag/stem/" target="_blank" class="keywords">stem</a>; using Sy<a href="https://www.jb51.cc/tag/stem/" target="_blank" class="keywords">stem</a>.Collections.Generic; using Sy<a href="https://www.jb51.cc/tag/stem/" target="_blank" class="keywords">stem</a>.Text; using Sy<a href="https://www.jb51.cc/tag/stem/" target="_blank" class="keywords">stem</a>.IO; using Sy<a href="https://www.jb51.cc/tag/stem/" target="_blank" class="keywords">stem</a>.Con<a href="https://www.jb51.cc/tag/fig/" target="_blank" class="keywords">fig</a>uration; using Sy<a href="https://www.jb51.cc/tag/stem/" target="_blank" class="keywords">stem</a>.Xml; static class Con<a href="https://www.jb51.cc/tag/fig/" target="_blank" class="keywords">fig</a>urationUtil { public static void Synchronize<T>() where T : SettingsBase { Type type = typeof(T); Sy<a href="https://www.jb51.cc/tag/stem/" target="_blank" class="keywords">stem</a>.Reflection.FieldInfo fieldInfo = type.GetField("defaultInstance",Sy<a href="https://www.jb51.cc/tag/stem/" target="_blank" class="keywords">stem</a>.Reflection.BindingFlags.Static | Sy<a href="https://www.jb51.cc/tag/stem/" target="_blank" class="keywords">stem</a>.Reflection.BindingFlags.NonPublic); SettingsBase newInstance = global::Sy<a href="https://www.jb51.cc/tag/stem/" target="_blank" class="keywords">stem</a>.Con<a href="https://www.jb51.cc/tag/fig/" target="_blank" class="keywords">fig</a>uration.ApplicationSettingsBase.Synchronized(Activator.CreateInstance<T>()); fieldInfo.SetValue(null,newInstance); } public static Sy<a href="https://www.jb51.cc/tag/stem/" target="_blank" class="keywords">stem</a>.Con<a href="https://www.jb51.cc/tag/fig/" target="_blank" class="keywords">fig</a>uration.Con<a href="https://www.jb51.cc/tag/fig/" target="_blank" class="keywords">fig</a>uration OpenCon<a href="https://www.jb51.cc/tag/fig/" target="_blank" class="keywords">fig</a>uration(string fileName) { string extention = Path.GetExtension(fileName); string file = fileName.Substring(0,fileName.Length - extention.Length); bool createproxyFile = false; if (!File.Exists(file)) { createproxyFile = true; File.CreateText(file).<a href="https://www.jb51.cc/tag/dis/" target="_blank" class="keywords">dis</a>pose(); } if (!File.Exists(fileName)) { File.Wri<a href="https://www.jb51.cc/tag/teal/" target="_blank" class="keywords">teal</a>lText(fileName,"<con<a href="https://www.jb51.cc/tag/fig/" target="_blank" class="keywords">fig</a>uration/>",Encoding.UTF8); } Sy<a href="https://www.jb51.cc/tag/stem/" target="_blank" class="keywords">stem</a>.Con<a href="https://www.jb51.cc/tag/fig/" target="_blank" class="keywords">fig</a>uration.Con<a href="https://www.jb51.cc/tag/fig/" target="_blank" class="keywords">fig</a>uration con<a href="https://www.jb51.cc/tag/fig/" target="_blank" class="keywords">fig</a> = Sy<a href="https://www.jb51.cc/tag/stem/" target="_blank" class="keywords">stem</a>.Con<a href="https://www.jb51.cc/tag/fig/" target="_blank" class="keywords">fig</a>uration.Con<a href="https://www.jb51.cc/tag/fig/" target="_blank" class="keywords">fig</a>urationManager.OpenExeCon<a href="https://www.jb51.cc/tag/fig/" target="_blank" class="keywords">fig</a>uration(file); if (createproxyFile) { File.Delete(file); } return con<a href="https://www.jb51.cc/tag/fig/" target="_blank" class="keywords">fig</a>; } public static Con<a href="https://www.jb51.cc/tag/fig/" target="_blank" class="keywords">fig</a>urationSectionGroup CreateApplicationSettingsGroup(Sy<a href="https://www.jb51.cc/tag/stem/" target="_blank" class="keywords">stem</a>.Con<a href="https://www.jb51.cc/tag/fig/" target="_blank" class="keywords">fig</a>uration.Con<a href="https://www.jb51.cc/tag/fig/" target="_blank" class="keywords">fig</a>uration con<a href="https://www.jb51.cc/tag/fig/" target="_blank" class="keywords">fig</a>) { Con<a href="https://www.jb51.cc/tag/fig/" target="_blank" class="keywords">fig</a>urationSectionGroup appsg = con<a href="https://www.jb51.cc/tag/fig/" target="_blank" class="keywords">fig</a>.RootSectionGroup.SectionGroups.Get("applicationSettings"); if (appsg == null) { appsg = new ApplicationSettingsGroup(); //appsg.Type = typeof(ApplicationSettingsGroup).AssemblyQualifi<a href="https://www.jb51.cc/tag/edn/" target="_blank" class="keywords">edn</a>ame; con<a href="https://www.jb51.cc/tag/fig/" target="_blank" class="keywords">fig</a>.RootSectionGroup.SectionGroups.Add("applicationSettings",appsg); //创建节点 } return appsg; } public static void WriteSettingElement(Con<a href="https://www.jb51.cc/tag/fig/" target="_blank" class="keywords">fig</a>uration con<a href="https://www.jb51.cc/tag/fig/" target="_blank" class="keywords">fig</a>,Con<a href="https://www.jb51.cc/tag/fig/" target="_blank" class="keywords">fig</a>urationSectionGroup sectionGroup,SettingsSerializeAs sas,string name,string value,string namespaceclass) { Con<a href="https://www.jb51.cc/tag/fig/" target="_blank" class="keywords">fig</a>urationSection sec = sectionGroup.Sections.Get(namespaceclass); Sy<a href="https://www.jb51.cc/tag/stem/" target="_blank" class="keywords">stem</a>.Con<a href="https://www.jb51.cc/tag/fig/" target="_blank" class="keywords">fig</a>uration.ClientSettingsSection clisec = sec as ClientSettingsSection; if (clisec == null) { //创建节 clisec = new ClientSettingsSection(); sectionGroup.Sections.Add(namespaceclass,clisec); } SettingElement secEle = clisec.Settings.Get(name); if (secEle == null) { secEle = new SettingElement(name,sas); clisec.Settings.Add(secEle); } secEle.Value.ValueXml = new XmlDocument().CreateElement("value"); if (sas == SettingsSerializeAs.Xml) { XmlDocument xmdoc = new XmlDocument(); xmdoc.LoadXml(value); secEle.Value.ValueXml.InnerXml = xmdoc.DocumentElement.OuterXml; } else { secEle.Value.ValueXml.InnerText = value; } } }

调用例子及以上源代码请点击下载，

http://download.csdn.net/source/1203171此源代码包括 《某个时候怀念VB6》，《Microsoft.VisualBasic类库的一个小Bug.txt》，《使用Microsoft.VisualBasic提供的进度对话框.txt》

注意，调试时请去除 启用Visual Studio 宿主进程，否则Config文件是宿主进程的Config文件，没有效果

作者：superlight