Regex problem

Question

Hello everyone,
I just want to filter decimal characters in rows. Rows are below;
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123,345,3,45,3
2,3,6,8,88,90
23,55,767,77
...
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As you see there are commas between decimal numbers. I tryed the regex code below but it is getting me plus 1 value (and it is null).
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string regx = @"[\d*]";
Regex rrgx = new Regex(regx);
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For examle if a row is like this; and there will be 8 values when I try to get each sample via "MatchCollection"
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12,23
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Which regular expression should I try to get these decimal numbers?