How to read web.config file using JavaScript

 

I have seen many people asking this question in .NET forums. So I thought I will share this small piece of code.

First we will see web.config entry which we are going to read,

<configuration>

      <appSettings>

            <addkey="WordTemplate"value="template.doc"/>

      </appSettings>

      <connectionStrings>

                 <add name="MysqlCon"

         connectionString="server=1xx.1xx.x.x;User Id=username;password=password;database=dbName;Persist Security Info=True"

         providerName="MySql.Data.MySqlClient" />

   </connectionStrings>

      </connectionStrings>

...

<configuration>

Now we will see the JavaScript function which reads above connection string and the AppSettings key,

<script language="javascript" type ="text/javascript"> 

function ReadWebConfig()

{

    var strCon = '<%=ConfigurationManager.ConnectionStrings["MysqlCon"].ConnectionString %>'

    alert(strCon);

    var strTemp = '<%=ConfigurationManager.AppSettings["WordTemplate"].ToString() %>'

    alert(strTemp);

}

</script>