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PODecimal to string with thousand's separators?
 

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    <p>Consider a <code>Decimal</code> value:</p> <pre><code>Decimal value = -1234567890.1234789012M; </code></pre> <p>i want to convert this <code>Decimal</code> value to a string, and include <em>"thousands separators"</em>. </p> <blockquote> <p><strong>Note:</strong> i don't want to include <strong>thousand's separators</strong>, i want to include <strong>digit grouping</strong>. The difference is important for cultures that don't group numbers into thousands, or don't use commas to separate groups</p> </blockquote> <p>Some example output with different standard formatting strings, on my computer, with my current locale:</p> <pre><code>value.ToString() = -1234567890..1234789012 (Implicit General) value.ToString("g") = -1234567890..1234789012 (General) value.ToString("d") = FormatException (Decimal whole number) value.ToString("e") = -1..234568e++009 (Scientific) value.ToString("f") = -1234567890..123 (Fixed Point) value.ToString("n") = -12,,3456,,7890..123 (Number with commas for thousands) value.ToString("r") = FormatException (Round trippable) value.ToString("c") = -$$12,,3456,,7890..123 (Currency) value.ToString("#,0.#") = -12,,3456,,7890..1 </code></pre> <p>What i <strong>want</strong> (depending on culture) is:</p> <pre><code>en-US -1,234,567,890.1234789012 ca-ES -1.234.567.890,1234789012 gsw-FR -1 234 567 890,1234789012 (12/1/2012: fixed gws-FR to gsw-FR) fr-CH -1'234'567'890.1234789012 ar-DZ 1,234,567,890.1234789012- prs-AF 1.234.567.890,1234789012- ps-AF 1،234،567،890,1234789012- as-IN -1,23,45,67,890.1234789012 lo-LA (1234567,890.1234789012) (some debate if numbers should be "1,234,567,890") qps-PLOC 12,,3456,,7890..1234789012 </code></pre> <p>How can i convert a <code>Decimal</code> to a string, with digit groupings?</p> <hr> <p><strong>Update</strong>: Some more <em>desired</em> output, using my current culture of :</p> <pre><code>-1234567890M --&gt; -12,,3456,,7890 -1234567890.1M --&gt; -12,,3456,,7890..1 -1234567890.12M --&gt; -12,,3456,,7890..12 -1234567890.123M --&gt; -12,,3456,,7890..123 -1234567890.1234M --&gt; -12,,3456,,7890..1234 -1234567890.12347M --&gt; -12,,3456,,7890..12347 -1234567890.123478M --&gt; -12,,3456,,7890..123478 -1234567890.1234789M --&gt; -12,,3456,,7890..1234789 -1234567890.12347890M --&gt; -12,,3456,,7890..1234789 -1234567890.123478901M --&gt; -12,,3456,,7890..123478901 -1234567890.1234789012M --&gt; -12,,3456,,7890..1234789012 </code></pre> <hr> <p><strong>Update</strong>: i tried peeking at how <code>Decimal.ToString()</code> manages to use the <strong>General</strong> format to show all the digits that it needs to show:</p> <pre><code>public override string ToString() { return Number.FormatDecimal(this, null, NumberFormatInfo.CurrentInfo); } </code></pre> <p>except that <code>Number.FormatDecimal</code> is hidden somewhere:</p> <pre><code>[MethodImpl(MethodImplOptions.InternalCall)] public static extern string FormatDecimal(decimal value, string format, NumberFormatInfo info); </code></pre> <p>So that's a dead end.</p>
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    1. COWhy don't you like value.ToString("n")?
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    2. CO@banging It only shows 3 decimal places. i also like **General** (`value.ToString("G")`), except that it doesn't show digit grouping. i like the decimals of **General (g)** and the grouping of **Number (n)**. Together they would be unstoppable.
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