String.Format() -- Input string was not in a correct format

Question

Getting this error on the String.Format() method and have no idea why, everything looks good to me?

string fontface = "";

foreach(...)
{
  fontface = String.Format(@"{3}
    @font-face {
        font-family: '{0}';
        src: url('{0}.eot');
        src: url('{0}.eot') format('embedded-opentype'),
                url('{0}.woff2') format('woff2'),
                url('{0}.woff') format('woff'),
                url('{0}.ttf') format('truetype'),
                url('{0}.svg#{0}') format('svg');
        font-weight:{1};
        font-style:{2};
    }"
  , family, weight, style, fontface);
}

Rahul Tripathi · Accepted Answer · 2014-09-10 05:03:40Z

8

You need to escape the "{", "}" by doubling them as string.Format() considers each '{' or '}' to be part of a placeholder (like '{0}')

Something like this:

fontface = String.Format(@"{3}
    @font-face {{
        font-family: '{0}';
        src: url('{0}.eot');
        src: url('{0}.eot') format('embedded-opentype'),
                url('{0}.woff2') format('woff2'),
                url('{0}.woff') format('woff'),
                url('{0}.ttf') format('truetype'),
                url('{0}.svg#{0}') format('svg');
        font-weight:{1};
        font-style:{2};
    }}"
  , family, weight, style, fontface);

answered Sep 10, 2014 at 5:03

Rahul Tripathi

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Comments

Scott Chamberlain · Accepted Answer · 2014-09-10 05:03:32Z

1

Your two problems are the lines @font-face { and }". When using Format you have to escape curly braces by using two of them. Just change those to lines to @font-face {{ and }}"

answered Sep 10, 2014 at 5:03

Scott Chamberlain

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1 Comment

Hassan Nisar Over a year ago

@ZeeTee, after @font-face you are using {

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