GOAL:
I'm trying to validate the user's email address as he/she types.
I'm just using simple regex because I don't want to use any external library. Also if use the regex like in here regex email for java I'm encountering error PatternSyntaxException that's why I prefer simple regex for now.
So I put the TextFormatter and UnaryOperator inside the initialize method.
#FXML
public void initialize()
{
//1. USE UNARY FIRST TO MAKE FILTER BEFORE USING TEXTFORMATTER
UnaryOperator <TextFormatter.Change> filterEmail = (change ->{
if(change.getControlNewText().matches("^(.+)#(.+)$*"))
{
lblEmailError.setVisible(false);
txtEmailAdd.setBorder(null);
return change;
}
else
{
lblEmailError.setText("Invalid Email");
lblEmailError.setVisible(true);
txtEmailAdd.setBorder(new Border(new BorderStroke(Color.RED, BorderStrokeStyle.SOLID, new CornerRadii(3), new BorderWidths(2), new Insets(-2))));
return null;
}
});
TextFormatter <String> tf = new TextFormatter<String>(filterEmail);
txtEmailAdd.setTextFormatter(tf);
}
But as long as the FXML loads I can't type anymore in the TextField and can't be edited anymore. I can't type anything. Maybe there is something wrong with my condition or I'm wrong putting it inside the initialize method.
I'm lost. I have already dug the web on how to validate email in java using regex.
like this Java regex email
I'm also using SceneBuilder to build the fxml. Any help will do thanks in advance.
Related
I am using a hierarchal custom post type (post type is called locations, slug = location) in WordPress. Locations can be nested (country/state/city)
I have successfully added custom query vars :
add_filter('query_vars', function($vars) { $vars[] = "view"; return $vars; });
which I use to decide what data to show for the location.
For example, mysite.com/location/country/?view=facts or mysite.com/location/country/state/city/?view=events
All of which is working great.
But I want to be able to access it as:
mysite.com/location/country/facts
mysite.com/location/country/state/city/facts
I have been playing around with add_rewrite_rule but can't make it work. Not sure if my $regex or $query is the problem; regex isn't my strong suit.
add_rewrite_rule( '/(view)/g', 'index.php?post_type=locations?view=$matches[1]','top' );
Try add_rewrite_endpoint, it is actually much simpler
https://developer.wordpress.org/reference/functions/add_rewrite_endpoint/
https://make.wordpress.org/plugins/2012/06/07/rewrite-endpoints-api/
Well i'm a student , and i'm still learning the dart language and the flutter framework, I was trying to make an application that makes you able to login into a site with a http post request and get data by manipulating the response of the html source code with some regular expressions to get what you need from the website,
(something like data scraping)
I tried to do that but nothing worked as planned.
I did this project! years ago and it was for desktop, with vb.net, I used a library called xNet which helped me to do that.
For this case I used the http dart package.
Is this kind of work can be done with dart?
Is there any specific packages for this?
Is there any docs available ?
I know html is not a regular language, i asked if it is possible to use http requests to login into a site!?
if i can do that i can manipulate the response and get what i need with some regular expressions.
I wanna do something like
C#
using (HttpRequest req = new HttpRequest())
{
req.UserAgent = Http.ChromeUserAgent;
req.Cookies = new CookieDictionary(false);
req.Proxy = null;
req.IgnoreProtocolErrors = true;
req.AddParam("login", cin.Text);
req.AddParam("no_anti_inject_password", pass.Text);
try {
string Respo = req.Post("http://www.example.com/login.php").ToString;
// to with that 'Respo'
if (Respo.Contains("disconnect"))
{
//Logged
//example
Match NAME = Regex.Match(Respo, "(.*?)");
name.Text = "Name: " + NAME.Groups(1).Value;
}else{
//not logged
//some code...
}
catch{
//some exception
}
}
HTML is not a regular language and so a regular expression is not a good way to scrape data from html. You may be interested in package:html which implements an HTML parser.
I'm looking for some regex to retrieve the GUID from the following URL
GetUploadedUserAudioIdfriendlyName=eb0c5663-a9c3-4321-8c0e-5ffbfb3139fc
I've so far got
GetUploadedUserAudioId\?friendlyName=([A-Fa-f0-9-]*)
but this is returning the full url
This is the image of where the expressions are to give you an idea of what I am trying to do.
Don't use a regex for this.
Assuming you're using C#.NET, use the static ParseQueryString() method of the System.Web.HttpUtility class that returns a NameValueCollection.
Uri myUri = new Uri("http://www.example.com?GetUploadedUserAudioIdfriendlyName=eb0c5663-a9c3-4321-8c0e-5ffbfb3139fc");
string param1 = HttpUtility.ParseQueryString(myUri.Query).Get("param1");
Check this documentation
EDIT: If you want it as a Guid after that, then cast it to one:
var paramGuid = new Guid(param1);
We manage several ASP.NET MVC client web sites, which all use a data annotation like the following to validate customer email addresses (I haven't included the regex here, for readability):
[Required(ErrorMessage="Email is required")]
[RegularExpression(#"MYREGEX", ErrorMessage = "Email address is not valid")]
public string Email { get; set; }
What I would like to do is to centralise this regular expression, so that if we make a change to it, all of the sites immediately pick it up and we don't have to manually change it in each one.
The problem is that the regex argument of the data annotation must be a constant, so I cannot assign a value I've retrieved from a config file or database at runtime (which was my first thought).
Can anyone help me with a clever solution to this—or failing that, an alternative approach which will work to achieve the same goal? Or does this just require us to write a specialist custom validation attribute which will accept non-constant values?
The easiest way is to write a custom ValidationAttribute that inherits from RegularExpressionAttribute, so something like:
public class EmailAttribute : RegularExpressionAttribute
{
public EmailAttribute()
: base(GetRegex())
{ }
private static string GetRegex()
{
// TODO: Go off and get your RegEx here
return #"^[\w-]+(\.[\w-]+)*#([a-z0-9-]+(\.[a-z0-9-]+)*?\.[a-z]{2,6}|(\d{1,3}\.){3}\d{1,3})(:\d{4})?$";
}
}
That way, you still maintain use of the built in Regex validation but you can customise it. You'd just simply use it like:
[Email(ErrorMessage = "Please use a valid email address")]
Lastly, to get to client side validation to work, you would simply add the following in your Application_Start method within Global.asax, to tell MVC to use the normal regular expression validation for this validator:
DataAnnotationsModelValidatorProvider.RegisterAdapter(typeof(EmailAttribute), typeof(RegularExpressionAttributeAdapter));
Checkout ScotGu's [Email] attribute (Step 4: Creating a Custom [Email] Validation Attribute).
Do you really want to put the regex in database/config file, or do you just want to centralise them? If you just want to put the regex together, you can just define and use constants like
public class ValidationRegularExpressions {
public const string Regex1 = "...";
public const string Regex2 = "...";
}
Maybe you want to manage the regexes in external files, you can write a MSBuild task to do the replacement when you build for production.
If you REALLY want to change the validation regex at runtime, define your own ValidationAttribute, like
[RegexByKey("MyKey", ErrorMessage = "Email address is not valid")]
public string Email { get; set; }
It's just a piece of code to write:
public class RegexByKeyAttribute : ValidationAttribute {
public RegexByKey(string key) {
...
}
// override some methods
public override bool IsValid(object value) {
...
}
}
Or even just:
public class RegexByKeyAttribute : RegularExpressionAttribute {
public RegexByKey(string key) : base(LoadRegex(key)) { }
// Be careful to cache the regex is this operation is expensive.
private static string LoadRegex(string key) { ... }
}
Hope it's helpful: http://msdn.microsoft.com/en-us/library/cc668224.aspx
Why not just write you own ValidationAttribute?
http://msdn.microsoft.com/en-us/library/system.componentmodel.dataannotations.validationattribute.aspx
Then you can configure that thing to pull the regex from a registry setting... config file... database... etc... etc..
How to: Customize Data Field Validation in the Data Model Using Custom
I am using GWT textBox and i want it to allow only alpha numeric characters.Is there any example somewhere where i can use the RegExp which is provided in GWT 2.1?
I would like to apply a regex for example ^[a-zA-Z0-9_]*$ .Please provide example code for making this working.Also i cannot use a third party library like the GWT-VL or something like that.
I am using GWT 2.1.
Thanks
You can simply use the matches method of the class String.
Here an example of an email validation:
if(!email.matches("^([a-zA-Z0-9_.\\-+])+#(([a-zA-Z0-9\\-])+\\.)+[a-zA-Z0-9]{2,4}$")) {
setErrorText("wrong mail");
}
Note that email is a String object.
HI you can use GWT-Validator framnework to do this GWT-Validator
Or you can use javascript method through JSNI and the method is mentioned below.
function validate(var string){
var alphanum=/^[0-9a-bA-B]+$/; //This contains A to Z , 0 to 9 and A to B
if(string.match(alphanum)){
return true;
}else{
alert(Put a Valid Userid Name);
return false;
}
}