How to store Database Connection string in web.config and get Connection sting in .cs file ?

You need to add connection string under  AppSettings or Connection strings tag

Example 1 : In appSettings section in web.config

Web.Config

<appSettings>

        <add key=”SQLConnection1″ value=”Database=MDS,Server=TestServer,UserID=sa,Password=sa” />

  </appSettings>

In .cs file , Configuration Manager class is used to fetch connection string . See below code to see how :

string strSQLConnection1 = ConfigurationManager.AppSettings[“SQLConnection1”];

But the better way is to add connection string in connectionstrings tag in web.config

See Web.Config for details :

<connectionStrings>

  <add name=”SQLConnection2″ connectionString=”Database=MDS,Server=TestServer,UserID=sa,Password=sa” providerName=”System.Data.SqlClient”/>

 </connectionStrings>

You can retrieve the connection string in web.config using Configuration Manager class in .cs file :

string strSQLConnection2 = ConfigurationManager.ConnectionStrings[“SQLConnection2”].ConnectionString;