String.Format - what is wrong in my string?

Question

I using String.Format this way:

String.Format("$(function() { $('{0}').menu(); });", "blaId");

I get an exception:

An exception of type 'System.FormatException' occurred and was caught.

How can I fix this?

Answer 1

You should escape { characters like this: {{, unless they are a part of placeholders like {0}.

String.Format("$(function() {{ $('{0}').menu(); }});", "blaId");

Answer 2

You have an invalid index value inside your curly braces. String.Format recognises this as a place holder for the formatting.

{ $('{0}').menu(); }

To resolve this, use double curly braces to escape:

String.Format("$(function() {{ $('{0}').menu(); }});", "blaId");