Subscribe to Youtube channel

Email validation using regular expression in jQuery

-
To validate user input for email-id it's very easy using regular expressions. Using regular expressions you do not need to write lengthy logical code in jQuery. Following are the steps to do the same.

  • Pass a string to RegExp or create a regex using the //syntax
  • Call regex.test(string)
So code would be...
jQuery(function () {
    $(".mail").keyup(function () {
        var VAL = this.value;

        var email = new RegExp('^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$');

        if (email.test(VAL)) {
            alert('Great, you entered an valid E-Mail-address');
        }
    });
});

Comments

Post a Comment

Popular posts from this blog

Implement Logging in CSV file using Nlog in .net core MVC application- part 2

-
Image
In previous article " Implement Nlog in .Net core MVC application part 1 "  I have demonstrated how we can implement basic setup of NLog in .core mvc application. In previous article we have logged the exceptions in flat file system. In this article I will show you how you can write the exception and custom logs in csv file. Writing logs in csv file can enable us better readability of logs in tabular form.       Lets start the implementation of it, I going to use the same example project used in previous demonstration. Modify the Nlog.config file as follows, added new target and rule for logging logs in csv file. <?xml version="1.0" encoding="utf-8" ?> <nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.nlog-project.org/schemas/NLog.xsd NLog.xsd" autoReload="true" throwExceptions="fal
Read more

Implement Nlog in .Net core MVC application part 1

-
Image
Logging is a very important part of the enterprise application/web application. Setting up the logging correctly not only beneficial for long term maintenance of the application but also it is useful tool to find out the RCA in case of mission critical bug arises. Therefor we will going to discuss the various logging technique implementation using Nlog library package. In this article we will going to use .net core application for demonstration but you can implement it in .net framework application also. So lets start the implementation of Nlog in .net core MVC application. Open visual studio 2019/17 and create the new project as shown below.     Select Asp.net core Web App (Model-View-Controller) and provide the project name in project name text box.   Now on next screen click on create button this will create MVC app with .net core Now go to solution explorer and right click on project and click on Manage Nuget Package. Now in Nuget package manager install below listed Nlog packages.
Read more

Devexpress Datebox date formatting in angular 6 with example

-
The Devexpress DateBox in Angular is a widget that displays the date and time in one of DevExtreme predefined formats or a format defined in an external localization library, or a type in the required date/time value. In this article, the i will provide you different date-format which we can set on DateBox to show date and time to user. Following is the code snippet to add Datebox in your Angular form if the you want to capture only date      <dx-date-box [value]="now" displayFormat="EEEE, MMM dd" type="date" > </dx-date-box> Following is the custom formats we can set and depending upon its converted values will be shown. "dd-MM-yyyy" => 28-10-2018 "EEEE, MMM dd" => Sunday, Oct 28 "dd MMM yyyy EEEE" => 28 Oct 2018 Sunday "dd-MM-yyyy EEEE" => 28-10-2018 Sunday alternatively you can change the format as way you want Following is
Read more

Disable backspace key using Jquery

-
Disable backspace key in HTML form using Jquery in simple steps. While user enters data into application if user accidentally  press backspace button then it will redirect to previous page and all entered data would be lost. to eliminate this event we can disable the backspace key using Jquery. Following is the JQuery script tag you can add to the web page $(document).keydown(function (e) { var nodeName = e.target.nodeName.toLowerCase(); if (e.which === 8) { if ((nodeName === 'input' && e.target.type === 'text') || nodeName === 'textarea') { // do nothing } else { e.preventDefault(); } } }); The above code can be used seamlessly with any web technology you are using. Hope this will help you in your web application. Happy coding:)
Read more

Angular User Session Timeout example step by step

-
Image
This functionality let the user know that their session is about to expire and that they would be logged out if they didn’t take action. I have written this functionality in Angular for my latest application.  If you are new to Angular 6 then read my article about Setting up Angular 6 step by step before jump to this article to get handy in Angular 6. Dealing with timers in Angular can be significantly different when using React components and subscriptions. The basic premises remains the same, though. We’ll have a service with a timer that will provide a Subject to which consumers of the service can subscribe. A React Subject provides an easy mechanism to trigger a “next” subscription to alert consumers that the timer has expired.   import { Injectable } from '@angular/core'; import { Observable, Subject, Subscription, BehaviorSubject} from 'rxjs/Rx'; @Injectable() export class IdleTimeoutService { private _count: number = 0;
Read more

Restore the lost focus of Auto post back controls in asp.net update Panel control

-
Problem: We put  autopostback controls like textbox, DropDownList controls inside in update panel to reducing the flickering of the Page.but when user uses tab for entering the details  the focus of the control losts. Web site users who prefer to use keyboard need to use mouse to activate appropriate input box or press TAB multiple times. Solution: Step 1: Save following in js file give any name to it (like MyUpdatePanelFocus.js ) var lastFocusedControlId = ""; function focusHandler(e) { document.activeElement = e.originalTarget; } function appInit() { if (typeof (window.addEventListener) !== "undefined") { window.addEventListener("focus", focusHandler, true); } Sys.WebForms.PageRequestManager.getInstance().add_pageLoading(pageLoadingHandler); Sys.WebForms.PageRequestManager.getInstance().add_pageLoaded(pageLoadedHandler); } function pageLoadingHandler(sender, args) { lastFocusedControlId = typeof (document.acti
Read more

How to Import CSV File and bind csv file data to gridview in asp.net using c#

-
I am going to demonstrate in this article about importing CSV file data into datatable and then bind that data to Asp.net gridview control. I have tried to make code simpler and less line of code. I am assuming that you have saved the csv file to server by using file-upload control. After that create function which returns string[] private IEnumerable<string[]> GetAllDataFromCSVFile(string FileName) { string str; using (StreamReader rd=new StreamReader(FileName)) { while ((str = rd.ReadLine()) != null) { yield return str.Split(','); } } } Create another function which returns final data-table with CSV File data private DataTable GetCSVData(string FileName) { var values = GetAllDataFromCSVFile(FileName); DataTable dt = new DataTable(); int j=0; foreach (var
Read more

Remove Owin from MVC 5 Application and use asp.net custom forms authentication

-
Image
Owin comes with 15 other dependencies when we add default "blank" mvc5 template in solution. Which some time is irrelevant to web application hence needs to be removed for adding custom authentication techniques in the web application. Remove the owin  from solution is tedious task but if we follow the below procedure then it can be easily removed from the solution. Right click on your project and from menu click on Manage Nuget Packages. on left side of Manage Nuget Packages window click on Installed Package then on right side of window in search box type owin.  Uninstall packages in order of: microsoft.aspnet.identity.owin microsoft.owin.host.systemweb microsoft.owin.security.cookies microsoft.owin.security.facebook microsoft.owin.security.google microsoft.owin.security.microsoftaccount microsoft.owin.security.twitter microsoft.aspnet.identity.entityframework microsoft.aspnet.identity.core Open web.config file and remove these sections from   &l
Read more

Clone a generic list in C# using extension method

-
In practical situation you need to clone of object so that change in cloned object will not affect the original one. If you need a cloned list with the same capacity you need to do some extra stuff with your user type. I came up with this easy solution using ICloneable interface in your custom type class. The first step you need to implement the ICloneable interface in your class like below. public class MyClassDto : ICloneable { public Int64 Id { get; set; } public string Time { get; set; } public int user{ get; set; } public object Clone() { return new MyClassDto{ Date = this.Date, Id = this.Id, user = this.user}; } } after that you need to add extension method in common class so that you can use it everywhere you want. public static class Extensions { public static List<T> Clone<T>(this List<T> listToClone) where T : ICloneable { return listToClone.Select(item
Read more