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2013-06-28T07:28:38.603
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2013-06-28T07:36:35.340
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You could also make an extension method for this purpose; <pre><code>public static bool TryParse(this object value, out int? parsed) { parsed = null; try { if (value == null) return true; int parsedValue; parsed = int.TryParse(value.ToString(), out parsedValue) ? (int?)parsedValue : null; return true; } catch (Exception) { return false; } } </code></pre> I've made this an extension on the <code>object</code> type, but it could equally well be on <code>string</code>. Personally I like these parser-extensions to be available on any object hence the extension on <code>object</code> instead of <code>string</code>. Example of use: <pre><code>[TestCase("1", 1)] [TestCase("0", 0)] [TestCase("-1", -1)] [TestCase("2147483647", int.MaxValue)] [TestCase("2147483648", null)] [TestCase("-2147483648", int.MinValue)] [TestCase("-2147483649", null)] [TestCase("1.2", null)] [TestCase("1 1", null)] [TestCase("", null)] [TestCase(null, null)] [TestCase("not an int value", null)] public void Should_parse_input_as_nullable_int(object input, int? expectedResult) { int? parsedValue; bool parsingWasSuccessfull = input.TryParse(out parsedValue); Assert.That(parsingWasSuccessfull); Assert.That(parsedValue, Is.EqualTo(expectedResult)); } </code></pre> The downside would be that this breaks with the frameworks syntax for parsing values; <pre><code>int.TryParse(input, out output)) </code></pre> But I like the shorter version of it (whether it's more readable or not might be subject to discussion); <pre><code>input.TryParse(out output) </code></pre>
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1. POHow to use int.TryParse with nullable int?
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1. USKjetil Klaussen
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