通过javascript读取web.config值

Question

I have web.config with the given value:

<appSettings>
        <add key="vDirectory" value="fr" />
        <add key="BookingSummaryPage" value="/pli/forms/BookingSummary.aspx" />
</appSettings>

Now I want to read the value of "vDirectory" through java script.

I am using below code:

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

function test()
{
var t='<%=ConfigurationManager.AppSettings("vDirectory").ToString() %>'
alert(t);
}
</script>

<input type="button" value="Click Me" onclick="test();" />

The error generated is:

Error 'System.Configuration.ConfigurationManager.AppSettings' is a 'property' but is used like a 'method' 

Answer 1

Edit: this doesn't answer your first issue, but still applies after you fix that. If vDirectory was something like "c:\\new folder" you'd end up with a newline in t .

I'm not sure what language you're using but you want to run the string though addslashes() (or the equivalent in your language) before you print it out like that:

var t='<%=addslashes(ConfigurationManager.AppSettings("vDirectory").ToString()) %>';

Or even better, JSON encode it if there's a function for that:

// Note no quotes as json_encode will add them
var t=<%=json_encode(ConfigurationManager.AppSettings("vDirectory").ToString()) %>;

Answer 2

Try this:

ConfigurationManager.AppSettings["vDirectory"].ToString()

Please note that square brackets are used instead of normal brackets.

Answer 3

If it's a property (variable), you can't call it, like its a method (function). So don't you need:

<%=ConfigurationManager.AppSettings.GetKey("vDirectory")%>

...?

http://msdn.microsoft.com/en-us/library/system.configuration.configurationmanager.appsettings.aspx