Strange result while writing a number in a textbox

Question

Aarghhhhh!!! I just asked how to input numbers only and now I have the problem that when I insert a number with code such as:

tbNum.Text = Convert.ToString(double.Parse(tbPerc.Text));

The number is an int instead of a double. Therefore I get something like 5623 instead of 562,3. I have set InputScope to number if it helps. Thanks!!!

In facts I have some calculations inside the Convert.ToString method but this isn't relevant because the returned value of a calculation between doubles is double.

So you are converting a string to a double that you convert to a string? aha... — f2lollpll, Mar 13 '12 at 20:20
Take a look at [http://stackoverflow.com/questions/105770/net-string-format-to-add-commas-in-thousands-place-for-a-number](http://stackoverflow.com/questions/105770/net-string-format-to-add-commas-in-thousands-place-for-a-number) — Raj Ranjhan, Mar 13 '12 at 20:31

score 0 · Answer 1 · answered Mar 14 '12 at 07:20

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I can't see the reason of converting the string to a double to a string, but if you insert 562.3 instead of 562,3 your example will work.

answered Mar 14 '12 at 07:20

Dudemeister

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score 0 · Accepted Answer · answered Mar 15 '12 at 14:57

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If you're using InputScope with Number set, then you're using the "." as decimal separator, not the "," (that's what appears in the keyboard)

As such, I assume your Windows Phone device / emulator is assuming the "," sign as a thousands separator (the en-US default, per example) and as such:

double.Parse("562,3") == 5623
double.Parse("562.3") == 562.3

answered Mar 15 '12 at 14:57

Pedro Lamas

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Do note that you should use `double.Parse("562.3", CultureInfo.InvariantCulture)` so that it will ignore the system wide CultureInfo and use an Invariant one (that has "." as decimal separator) – Pedro Lamas Mar 15 '12 at 16:11

Strange result while writing a number in a textbox

2 Answers2