Read Variable from Web.Config

Question

Hello All,

How can I add and read value from web.config

Thanks in Advance

Answer 1

Assuming the key is contained inside the <appSettings> node:

ConfigurationSettings.AppSettings["theKey"];

As for "writing" - put simply, dont.

The web.config is not designed for that, if you're going to be changing a value constantly, put it in a static helper class.

Answer 2

I would suggest you to don't modify web.config from your, because every time when change, it will restart your application.

However you can read web.config using System.Configuration.ConfigurationManager.AppSettings

Answer 3

Ryan Farley has a great post about this in his blog, including all the reasons why not to write back into web.config files: Writing to Your .NET Application's Config File

Answer 4

Hello ,

Suppose In web config You have variable like that

<appSettings>

     <add key="ClientId" value="127605460617602"/>

     <add key ="RedirectUrl" value="http://localhost:49548/Redirect.aspx"/&gt;
  </appSettings>

In aspx page you can use like that ..........

1st you have to add namespace

using System.Configuration;

Then you can use

string Clientid=ConfigurationManager.AppSettings["ClientId"].ToString();
string Redircturl=ConfigurationManager.AppSettings["RedirectUrl"].ToString();

Hope it works for you.