C# 中Web.config文件的读取与写入
转载http://www.cnblogs.com/benben789/archive/2009/06/03/1495221.html
asp.net2.0操作web.config(增,删,改,查)
asp.net2.0新添加了对web.config直接操作的功能。开发的时候有可能用到在web.config里设置配置文件,其实是可以通过程序来设置这些配置节的。
asp.net2.0需要添加引用:
using System.Web.Configuration;
web.config里的配置节:
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
<appSettings>
<add key="FilePath" value="g:\Test\WebConfigManager\Upload\" />
<add key="p" value="g:\" />
</appSettings>
(1)读
string filepath = ConfigurationManager.AppSettings["FilePath"];
(2)添加
Configuration config = WebConfigurationManager.OpenWebConfiguration("/WebConfigManager");
AppSettingsSection app = config.AppSettings;
app.Settings.Add("p", "p:\\");
config.Save(ConfigurationSaveMode.Modified);
AppSettingsSection app = config.AppSettings;
app.Settings.Add("p", "p:\\");
config.Save(ConfigurationSaveMode.Modified);
(3)修改
Configuration config = WebConfigurationManager.OpenWebConfiguration("/WebConfigManager");
AppSettingsSection app = config.AppSettings;
app.Settings["p"].Value = @"g:\";
config.Save(ConfigurationSaveMode.Modified);
AppSettingsSection app = config.AppSettings;
app.Settings["p"].Value = @"g:\";
config.Save(ConfigurationSaveMode.Modified);
(4)删除
Configuration config = WebConfigurationManager.OpenWebConfiguration("/WebConfigManager");
AppSettingsSection app = config.AppSettings;
app.Settings.Remove("p");
config.Save(ConfigurationSaveMode.Modified);
AppSettingsSection app = config.AppSettings;
app.Settings.Remove("p");
config.Save(ConfigurationSaveMode.Modified);
注意:
(1)asp.net用户需要有读取、修改、写入的权限。
(2)WebConfigManager是web.config所在的文件夹名。