Reading web.config value through javascript

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'

That should work (although is not the most recomended way to handle this). What does the alert show? an empty value? — Andrea
– Andrea, Commented Jun 26, 2009 at 13:36
Its displaying error Error 'System.Configuration.ConfigurationManager.AppSettings' is a 'property' but is used like a 'method' — Manoj Singh
– Manoj Singh, Commented Jun 26, 2009 at 13:40

Greg · Accepted Answer · 2009-06-26 13:40:24Z

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()) %>;

answered Jun 26, 2009 at 13:40

Greg

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3 Comments

Manoj Singh Over a year ago

It is giving error Error The name 'json_encode' does not exist in the current context

Manoj Singh Over a year ago

any idea how I can add "addslashes" in javascript?

Greg Over a year ago

You need to do the addslashes bit in your server-side code not javascript.

Pradeep Iyer · Accepted Answer · 2011-04-12 10:43:50Z

1

Try this:

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

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

answered Apr 12, 2011 at 10:43

Pradeep Iyer

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Comments

Lee Kowalkowski · Accepted Answer · 2009-06-26 20:42:47Z

0

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

answered Jun 26, 2009 at 20:42

Lee Kowalkowski

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