Question

How to update settings in web.config File in ASP.Net ?

<appSettings>
  <add key="DataSource" value="localhost\SQLEXPRESS,1433">
  <add key="InitialCatalog" value="CenTimetracker" />
  <add key="user" value="uzer" /><add key="password" value="pazz" />
  <add key="IntegratedSecurity" value="True" />
  <add key="configured" value="False" />
</appSettings>

I’m developing an ASP.NET website and im using web.config file to keep database connection details. as shown in the above code segment.

And i’m using following code to retrieve saved application settings at the runtime

string dataSource = ConfigurationManager.AppSettings["DataSource"].ToString();

How can i assign value in a textbox to web.config file? I have used following piece of code, but it doesn’t save the config file.

ConfigurationManager.AppSettings["DataSource"] = TextDataSource.Text;

Answer 1

Configuration myConfiguration = System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration("~");
myConfiguration.AppSettings.Settings["DataSource"].Value = "some value";
myConfiguration.Save();

Hope it helps.