What is the mask for "percentage", in a WinForms application (VB.net)?
Per the documentation here: http://msdn.microsoft.com/en-us/library/system.windows.forms.maskedtextbox.mask.aspx
\ Escape. Escapes a mask character,
turning it into a literal. "\\" is the
escape sequence for a backslash.
So the mask for a % sign is \%
Before posting, I made up a quick and dirty winforms app, tried it and it works.
Edit - added although this next item in the documentation makes it look like just a straight % sign should work without the backslash, so I tried it and it works as well.
All other characters Literals. All
non-mask elements will appear as
themselves within MaskedTextBox.
Literals always occupy a static
position in the mask at run time, and
cannot be moved or deleted by the
user.
textEdit1.Properties.Mask.MaskType = Numeric;
textEdit1.Properties.Mask.EditMask = "00.00%%";
textEdit1.Properties.Mask.UseMaskAsDisplayFormat = true;
http://community.devexpress.com/forums/t/59535.aspx
Related
I have a localized string that looks something like this in English:
"
5 Mile(s)
5,252 Step(s)
"
My app is localized both in left-to-right and right-to-left languages so I don't want to make assumptions either about the ordering of the step(s) or about the formatting of the number (e.g. 5,252 can be 5.252 depending on user locale). So I need to account for possibilities that can include things like
Step(s) 5.252
as well as what's above.
A few other caveats
All I know is that if the Step(s) line is in there, it will be on its own line (hence in my regex I require \n at each end of the string)
No guarantee that the Mile(s) information will be in the string at all, let alone whether it will be before or after Step(s)
Here's my attempt at pattern extraction:
NSString *patternString = [NSString stringWithFormat:#"\\n(([0-9,\\.]*)\s*%#|%#\s*([0-9,\\.]*))\\n",
NSLocalizedString(#"Step(s)",nil), NSLocalizedString(#"Step(s)",nil)];
There appear to be two problems with this:
XCode is indicating Unknown escape sequence '\s' for the second \s in the pattern string above
No matches are being found even for strings like the following:
0.2 Mile(s)
1,482 Step(s)
Ideally I would extract the 1,482 out of this string in a way that is localization friendly. How should I modify my regex?
as far as the regex, perhaps this approach might work - it simply matches (with named groups) each couplet of numbers in sequence, with the assumption the first is miles and the second is steps. Decimals in the . or , form are optional:
(?<miles>\d+(?:[.,]\d+)?).*?(?<steps>\d+(?:[.,]\d+)?)
(and i think it should be \\s) - i'm not an ios guy, but if you can use a regex literal it would be way more readable.
regular expression demo
First I'd like to ask - Why is Mile(s) mentioned in the question at all?
And now to my two bits - you could simply use a positive look-ahead:
^(?=.*Step\(s\))[^\d]*(\d+(?:[.,]\d+)?)
It makes sure the expected word is present on the line, and then captures the number on it, allowing for localized, optional, decimal separator and decimals. This way it doesn't matter if the numer is before, or after, the "word".
It doesn't take localization of the "word" into account, but that you seem to have handled by yourself ;)
See it here at regex101.
Your regex is close, although in Obj-C you need to double-escape the \s and (s):
^(([0-9,.]*)\\s*%#|%#\\s*([0-9,.]*))$
In your NSLocalizedString you likely also need to escape the parentheses enclosing (s):
NSString *patternString = [NSString stringWithFormat:#"^(([\\d,.]+)\\s%#|%#\\s([\\d,.]+))$",
NSLocalizedString(#"Step\\(s\\)",nil), NSLocalizedString(#"Step\\(s\\)",nil)];
If you don't escape (s) then the regex engine is probably going to interpret it as a capture group.
Looking at NSLog you can see what the pattern actually reads like:
NSLog(#"patternString: %#", patternString);
Output:
patternString: ^(([\d,.]+)\sStep\(s\)|Step\(s\)\s([\d,.]+))$
Since you mentioned the Mile(s) part may not be in the string at all I'm assuming it isn't relevant to the regular expression. As I understand from the question, you just need to capture the number of steps and nothing else. On this basis, here's a modified version of your existing regex:
NSString *patternString =
[NSString stringWithFormat:#"^(?:([0-9,.]*)\\s*%#|%#\\s*([0-9,.]*))$",
NSLocalizedString(#"Step\\(s\\)",nil), NSLocalizedString(#"Step\\(s\\)",nil)];
Demo:
https://www.regex101.com/r/Q6ff1b/1
This is based on the following tips/modifications:
Use the m (= UREGEX_MULTILINE) flag option when creating the regex to specify that ^ and $ match the start and end of each line. This is more sophisticated than using \n as it will also handle the start and end of the string where this might not be present. See here.
Always use a double backslash (\\) for regex escaping - otherwise NSString will interpret the single backslash to be escaping the next character and convert it before it gets to the regex.
Literal parentheses need to be escaped - e.g. Step\\(s\\) instead of Step(s).
Characters within a character class (i.e. anything within the [] square brackets) don't need to be escaped - so it would be . rather than \\. - the latter.
If you are using (x|y|...) as a choice and don't need it to be a capturing group, use ?: after the first parenthesis to ensure it doesn't get captured - i.e. (?:x|y|...).
Shopify's documentation shows some of the characters that are allowed in product handles (the product identifier that is used in URLs).
Since handles are used for your storefront navigation for products,
collections, blogs and pages, they must use alpha-numeric characters
(a-z, 0 to 9) without accents (such as umlauts, and other
diacriticals), nor characters such as # or # etc., and no spaces.
Spaces will be converted to hyphens, other characters may be stripped
entirely or converted to an equivalent standard ASCII character.
But if I create a product in the web interface with the title 'a b-c_d.e' then the handle generated by Shopify is 'a-b-c_d-e'. It seems like underscores are allowed, but spaces and dots are converted to hyphens.
What is the full set of characters allowed in product handles?
I wrote a script to test if the Shopify API accepts each of the ASCII codes from 0 to 127 in a product handle. It tries to modify the handle of an existing product to xCxC where C is the ASCII character to test and x is literally the letter x. I did it this way to find out how each character is handled when surrounded by text and also when trailing at the end of the handle.
Here are the results:
Allowed:
0-9
a-z
A-Z (will be converted to lowercase)
_ (underscore)
Allowed when surrounded but removed when at the end of the string:
- (hyphen)
Converted to - (hyphen) when surrounded but removed when at the end of the string
space
! # $ % & * + , . / : ; < = > ? # \ ^ ` { | } ~
ASCII control codes 0 to 32
Removed
" ' ( ) [ ]
See Wikipedia for details on each ASCII code: https://en.wikipedia.org/wiki/ASCII
The accepted answer is outdated.
Shopify allows many non-english characters inside URLs.
Example
https://example.myshopify.com/collections/무료/products/이지부
is now a valid Shopify URL.
I can confirm that the Navigation feature used to create menus inside Shopify does not pass quotation symbols or inch symbol, i.e: " specifically when creating a custom URL link in a navigation menu.
The symbol is allowed when entered but it is removed before being passed to the liquid template files.
Unexpectedly, you can use this symbol to create a query URL, i.e:
.../tvs/lg?pf_opt_tv_size=28.5"
This is particularly annoying when creating a Navigation link to a custom query URL created by a search filter app, Shopify will internally remove these characters for you.
Basically all the characters that are not affected by URL decode/encode functions.
Underscores (_) and Hypens (-) escape from this, also does the stop (.); but it's a URL schema parameter and hence gets converted to Shopify handle schema namely -.
My program makes calculations on physics vectors and it allows copy/pasting from websites and then tries to parse them into the x, y, and z components automatically. I've come across one website (http://mathinsight.org/cross_product_examples) that has (3,−3,1). While that looks normal, that minus is actually not recognized by VB. Visually, it is longer than the normal minus (− and -), but return the same Unicode of 45. This picture shows the Unicode for every character (I added a minus in front of the first 3 for comparison) in the Textbox. Also, from this website, I had to use Ctrl+c because right clicking shows that this is not simple HTML.
One is valid (the first), but the second gives VB fits as shown below. Either it won't compile (shown by the blue line below) or a simple assignment (the second one) wrecks havok on my form.
I have tried using
vectorString.Replace("–", "-")
and pasting in the longer dash for the target string and a normal keystroke dash as the replacement, but nothing happens. I'm guessing that since they both have the same Unicode.
Is there some way to convert the longer, invalid dash into the one recognized by VB? I tried using dash symbol that Word likes to replace the minus sign with and it comes up as Unicode 150. So, apparently there are at least three different kinds of dashes. Any thoughts?
The character from Math Insight is U+2212, minus sign. The character you tried using in your Replace call is U+2013, en dash. That's why your replace didn't work.
Beyond the standard ASCII hyphen (-, U+0045), there are two common dashes: the en dash (–, U+2013) and the em dash (—, U+2014). There is also a figure dash (‒, U+2012), but it is not as common.
I've made some good progress with my first attempt at a program, but have hit another road block. I'm taking standard output (as a string) froma console CMD window (results of dsquery piped to dsget) and have found small rectangles in the output. I tried using Regex to clean the little bastards but it seems they are related to the _ (underscore), which I need to keep (to return 2000/NT logins). Odd thing is - when I copy the caharcter and paste it into VS2K10 Express it acts like a carrige return??
Any ideas on finding out what these little SOB's are -- and how to remove them?
Going to try using /U or /A CMD switch next..
The square is often just used whenever a character is not displayable. The character could very well be a CR. You can use a Regular Expression to just get normal characters or remove the CR LF characters using string.replace.
You mentioned that you are using the string.replace function, and I am wondering if you are replacing the wrong character or something like that. If all your trying to do is remove a carriage return I would skip the regular expressions and stick with the string.replace.
Something like this should work...
strInputString = strInputString.replace(chr(13), "")
If not could you post a line or two of code.
On a side note, this might give some other examples....
Character replacement in strings in VB.NET
I have a Sql statament using special character (ex: ('), (/), (&)) and I don't know how to write them in my VB.NET code. Please help me. Thanks.
Find out the Unicode code point for the character (from http://www.unicode.org) and then use ChrW to convert from the code point to the character. (To put this in another string, use concatenation. I'm somewhat surprised that VB doesn't have an escape sequence, but there we go.)
For example, for the Euro sign (U+20AC) you'd write:
Dim euro as Char = ChrW(&H20AC)
The advantage of this over putting the character directly into source code is that your source code stays "just pure ASCII" - which means you won't have any strange issues with any other program trying to read it, diff it, etc. The disadvantage is that it's harder to see the symbol in the code, of course.
The most common way seems to be to append a character of the form Chr(34)... 34 represents a double quote character. The character codes can be found from the windows program "charmap"... just windows/Run... and type charmap
If you are passing strings to be processed as SQL statement try doubling the characters for example.
"SELECT * FROM MyRecords WHERE MyRecords.MyKeyField = ""With a "" Quote"" "
The '' double works with the other special characters as well.
The ' character can be doubled up to allow it into a string e.g
lSQLSTatement = "Select * from temp where name = 'fred''s'"
Will search for all records where name = fred's
Three points:
1) The example characters you've given are not special characters. They're directly available on your keyboard. Just press the corresponding key.
2) To type characters that don't have a corresponding key on the keyboard, use this:
Alt + (the ASCII code number of the special character)
For example, to type ¿, press Alt and key in 168, which is the ASCII code for that special character.
You can use this method to type a special character in practically any program not just a VB.Net text editor.
3) What you probably looking for is what is called 'escaping' characters in a string. In your SQL query string, just place a \ before each of those characters. That should do.
Chr() is probably the most popular.
ChrW() can be used if you want to generate unicode characters
The ControlChars class contains some special and 'invisible' characters, plus the quote - for example, ControlChars.Quote