As you all know, ASP.net provides a webapplication profile web.config that makes it easy to set up Web applications, as well as adding some of the units we often use in the appsettings section, such as database connection strings, using system.conf Iguration. Configurationsetting class We can easily read the values of these units, but to change these values will require some tricks, I will tell you how to use the System.Management in the runtime to change the values of these units.
Now suppose you have a webapplication named MyWebApp, the virtual path is: http://localhost/MyWebApp, directory path is: C:\INETPUB\WWWROOT\MYWEBAPP, The appsettings settings in the configuration file Web.config are as follows:
<configuration>
<appSettings>
<add key= "Test" value= "runtime modify Test"/>
</appSettings>
</configuration>
Create a new console application to add the following code:
Using System;
Using System.Management;
Namespace ConsoleApplication1
{
Class Class1
{
[STAThread]
static void Main (string[] args)
{
ManagementObject appset= New ManagementObject ("Root\\netframeworkv1:appsettings.directive=\ add\", key=\ "test\", Selector=\ "file://c:/inetpub/wwwroot/mywebapp/web.config\");
Console.WriteLine (String. Format ("Old value:{0}", appset["value"]);
Appset.setpropertyvalue ("Value", "new value was set ok!");
Appset.put ();
Console.WriteLine ("New value setted ok!");
Console.read ();
}
}
}
Compile and run, and then see if Mywebapp/web.config has been successfully modified
