Read web.config values from Javascript

Question

I want to read an app key from the web.config file via java script. The web.config key to be read

<appSettings>
      <add key="Key1" value="value1" />
<appSettings>

I include the following inside my java script function.

function Evaluate() {
    var key = '<%=ConfigurationManager.AppSettings["Key1"].ToString() %>';
    alert(key);
}

However, I end up getting <%=ConfigurationManager.AppSettings["Key1"].ToString() %> in the alert.

What am i missing?

Answer 1

The <%= => tag is only going to execute if it is within a .aspx file. If you place it within a .js file, then it will just be like any other text. In order for your code to work, the javascript you posted would have to be embedded within the .aspx file.