Question

I am using String.Format and keep getting the error: Input String is Not in the Correct Format.

I have tried to eliminate different possibilities, but I cannot find the solution.

The solution must be a simple one, yet I cannot find it.

var peanuts = String.Format("{label: '{0}', legendEntry: true, data: { y: [new Date('{1}')], x: [new Date('{2}')], y1: [{3}] } }",
"name", "sync date", "download date", "100");

Answer 1

You have to escape any { characters in your format string, else they will be interpreted as items to be formatted (replaced.)

To insert a literal bracket { you double it, like this {{.

So your string would be:

var peanuts = String.Format("{{label: '{0}', legendEntry: true, data: {{ y: [new Date('{1}')], x: [new Date('{2}')], y1: [{3}] }} }}",
    "name", "sync date", "download date", "100");

See the Escaping Braces on the Composite Formatting MSDN page.