How to read Web.Config Values in Sharepoint

A typical Sharepoint Site consists of some site collections, sub sites. Since the root web is also a site collection, so in our SharePoint context, we cannot retrieve the web configuration <AppKeys> values directly from the SPWeb or SPWeb.RootWeb. Instead we will need to create an instance of Configuration from our WebApplication. I have written a simple method that you can use to read app keys that you put in the web.config of your Sharepoint site in any of the sub-site inside that web application.

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        /// <summary>

        /// GetConfigValueByKey

        /// </summary>

        /// <param name="Key"></param>

        /// <param name="webApp"></param>

        /// <returns></returns>

        public static string GetConfigValueByKey(string Key, SPWebApplication webApp)

        {

            //required for getting config val from web app

            String strVal = String.Empty;

            Configuration config = WebConfigurationManager.OpenWebConfiguration("/", webApp.Name);

            if (config.AppSettings.Settings[Key] != null)

            {

                strVal = config.AppSettings.Settings[Key].Value;

            }

            return strVal;

        }

You will need to use the following namespace in your class: 

 

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using System.Configuration;