Created
March 27, 2013 14:59
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Extension to make string formatting for pretty ;;)
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using System; | |
using System.Collections.Generic; | |
using System.Text.RegularExpressions; | |
namespace Helpers | |
{ | |
public static class StringFormatExtension | |
{ | |
// http://james.newtonking.com/archive/2008/03/27/formatwith-string-format-extension-method.aspx | |
public static string FormatWith(this string format, params object[] args) | |
{ | |
if (format == null) | |
throw new ArgumentNullException("format"); | |
return string.Format(format, args); | |
} | |
public static string FormatWith(this string format, IFormatProvider provider, params object[] args) | |
{ | |
if (format == null) | |
throw new ArgumentNullException("format"); | |
return string.Format(provider, format, args); | |
} | |
// http://james.newtonking.com/archive/2008/03/29/formatwith-2-0-string-formatting-with-named-variables.aspx | |
public static string FormatWith(this string format, object source) | |
{ | |
return FormatWith(format, null, source); | |
} | |
public static string FormatWith(this string format, IFormatProvider provider, object source) | |
{ | |
if (format == null) | |
throw new ArgumentNullException("format"); | |
var r = new Regex(@"(?<start>\{)+(?<property>[\w\.\[\]]+)(?<format>:[^}]+)?(?<end>\})+", | |
RegexOptions.Compiled | RegexOptions.CultureInvariant | RegexOptions.IgnoreCase); | |
var values = new List<object>(); | |
string rewrittenFormat = r.Replace(format, delegate(Match m) | |
{ | |
Group startGroup = m.Groups["start"]; | |
Group propertyGroup = m.Groups["property"]; | |
Group formatGroup = m.Groups["format"]; | |
Group endGroup = m.Groups["end"]; | |
values.Add((propertyGroup.Value == "0") | |
? source | |
: DataBinder.Eval(source, propertyGroup.Value)); | |
return new string('{', startGroup.Captures.Count) + (values.Count - 1) + formatGroup.Value | |
+ new string('}', endGroup.Captures.Count); | |
}); | |
return string.Format(provider, rewrittenFormat, values.ToArray()); | |
} | |
} | |
} |
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