Most voted "web-application" questions
In computing, web applications are generally computer systems designed for use from a browser, via the Internet, or applications developed using web technologies such as HTML, Javascript, and CSS. Can be run from an HTTP Web Host server or locally, on the user’s device.
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answers692
viewsHibernate, JPA, does not save the new data in the database
I have a Java Spring MVC application, with Hibernate and JPA and HTML interface. I have two forms that depend on the Notebooks class and its attributes. In the first form I enter the data of a new…
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answers208
viewsContext 'this' of Eventemitter<string> is not attributable to the 'this' method of type Observable<string>
I looked at the example in a Github repository. The application runs successfully and the written code works normally, but I have the following error in my Visual Studio Code: The 'this' context of…
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answer1038
viewsRelationship Django Models
I have a model called Item and made a call Compra. I was able to relate several items with each purchase, but I don’t know how to relate the quantity of each item in each purchase. class…
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answers123
viewsDependency Injection - Web Api
Good Afternoon, I’m trying to create the dependency injection in the Web Api, but I’m not getting it, I get the following error: SimpleInjector.DiagnosticVerificationException Hresult=0x80131500…
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answer38
viewsRoboto-Woff error
I’m making a web app, but my page is blank, and featuring the following errors: I did some Google searches, and I saw that it is related the sources and such, but as I am extremely novice, I wanted…
web-applicationasked 6 years ago Excel 83 -
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answers46
viewsAdd value to a <script> property
Hello, I have the following code <html> //=======Teste1======== <script type="text/javascript" src="http://modulo.que.sera.carregado.js" data-token=""> </script>…
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answers245
viewsReturn a SELECT * FROM" in the Javaweb browser
Hello guys I am studying Javaweb and I came across a boring mistake!! I’ve done a lot of research on the subject but I couldn’t solve this mistake. I have this method that is pulling all data from…
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answer257
viewsTypescript+Angular: Property is Missing in type [2322]
I’m having a user mock problem that I’m doing on TS, it’s my first site in life and I’m kind of lost with some mistakes. I end up wasting hours trying to solve simple mistakes This is the error, but…
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answer42
viewsBottle: accessing the same session on different Canister devices
Hello, I am developing a project to study character and I am with a great inconvenience. I’m using: astroid==2.0.4 Bottle==0.12.13 canister==1.5.1 Colorama==0.4.0 cymysql==0.9.12 Cython==0.29…
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answer73
viewsWCF services with a number of different methods (endpoints)
I took a project that uses WCF and I’m not getting to solve this mystery. I have two Solutions: Project A and Project B. When he tries to instantiate the OAuthServiceClient within the Project B, it…
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answers37
viewsSetting in charjs charts
Good morning guys, I have a graph that has a variable with 100 values, but when the chartJs will display it abstract and displays less points than it should, causing the graph to be half broken as…
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answers52
viewsMultiply product price by quantity
Good morning. I am a beginner programmer and I am developing a sales app, where the system includes the products dynamically in the sale. The products are already registered in the database, and…
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answer27
viewsrecovering array with PDO
I have a problem that I’ve been through before but I can’t remember how I solved it. The goal is to compare two tables of the database and return only the corresponding values between the two, in my…
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answer98
viewsWeb Scraping or Web Crawler isolate Node
Please, I’m trying to retrieve the following information: "value bra": (<span class="value bra">3,666</span>) <div class="ticker-financial-market" initiated="true"> <div…
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answer42
viewsHow to show data in the template
I have this model: class template(models.Model): nome = models.CharField(max_length=30) is view: def home(request): dados = template.objects.all() return render(request,'index.html',…
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answers1144
viewsHTML does not find image <img>
Good evening, I’m having a problem with the HTML tag,I started a project for a website of a virtual store, first I did an HTML draft, then when I went to the PHP part, I installed the WAMP…
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answers69
viewsDash Problem in Python
I’m trying to run this application on my laptop (Macbook air), and when I go to Terminal it does not run, but when it runs on a windows PC I have no problems import dash import dash_core_components…
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answer647
viewsPHP/Mysql Undefined variable in code
I’m trying to run this php code, but it reports me an error "Notice: Undefined variable: num_row in C: wamp64 www balance login.php on line 63" The variable was created on line 23 but it still…
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answer417
viewsChange a user’s password in Django, and check that the data provided is correct
I am working on a project in Django for didactic purposes and I am having trouble changing user password in Django. However I already managed to change the password through a form as below: These…
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answer232
viewsHow to use more than one modal bootstrap on a single web page
Guys, I’m learning to use Bootstrap 4 and I was wondering if it’s possible and if so, how to use more than one modal on a page? wanted to use 3 modals on the msm page, or even more, however, even…
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answer102
viewsModal does not load the data that is coming from the database correctly
Good morning. Guys, I got a little problem here. I am showing in the view a table, where if a column has a certain status will show a link to open a model where will be shown the data that are in…
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answer48
viewsjinja2 error: jinja2.exceptions.Templatesyntaxerror: Unexpected '%'
My code is generating a " Unexpected '%' error", all symbols being properly correct. I have a route to show the companies Cnpjs in a list, follows function of the listing below:…
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answers32
viewsThere is a way to save an Araaylist<Food> in the MYSQL database
Here’s my situation: I’m putting together an app that indicates meals . So I have a table called food, which has as fields: idAlimento, name, measure For example: 1 , rice, 100 grams 2, feijao, 50…
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answer80
viewsThe google maps marker does not change the icon correctly when clicked
I’m working with the API of google maps for javascript and I’m carrying markers that represent the position of deliveries (the blue motilas) on the map, when I click on a particular deliverer I want…
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answer60
viewsPDO - Showing bank information
While trying to connect to Database without internet connection the program shows me this error message: Fatal error: Uncaught PDOException: SQLSTATE[HY000] [2002] Network is unreachable in…
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answer86
viewsError using <f:Event>
I’m struggling with something that seems simple to solve, but I’ve already wasted considerable time on it, and I hope someone can help me.. , good. , in my View I use to call a method before…
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answer1143
viewsHow to use except in mysql
I need to select one in an offer table and then use an except to delete the other select result Example: A = {10,11,12} B = {11,12} (A except B) = {10} I’m talking about except pq for what I had…
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answer28
viewsDo I upload all the data directly into the HTML page or access the database more often?
I’m developing a web project for real estate. On the page is the mirror of sales or the floor plan of the condominium of houses to be sold. When the user clicks on one of the plant houses, the…
javascript c# html database web-applicationasked 5 years, 6 months ago Luis Fernando Martinelli Ramos 23 -
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answers232
viewsDoubt with set value (codeigniter)
I have a form that after the validation using form_validation, I would like that if errors occurred, that when showing the view, return to the value I previously selected in form_dropdown, as well…
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answer64
viewsAssociate Label in If
I have 3 DropDownList, take their values, multiple and display result. However, I do not want to display this information in numerical format, but rather a label, as well as mineDropDownList. They…
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answers181
viewsPosition a circular image in the center
I am creating a website and would like to position the image in the center. .circle { background-color: #aaa; border-radius: 50%; width: 150px; height: 150px; overflow: hidden; position: relative; }…
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answer36
views"lazily" error in java web application
Good afternoon, I am developing a library web system, however, on the book page I can usually persist with the data, but when I try to edit them, the error occurs: "HTTP Status 500 - failed to…
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answers229
viewsUpload with Thymeleaf
Good afternoon, you guys, I am with a difficulty, I am developing a simple system, it reads a csv file and imports to a database, I risked using Thymeleaf, I found some tutorials but I could not…
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answer29
viewsSelect One Rendered Menu
Good afternoon, I have two selects one menu, one loads the states and the other I want to load the cities of that state at runtime, only I can’t, it doesn’t even load the page when I try to use…
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answer225
viewsHow can I manipulate data from a form in Django?
I’m a beginner in Django and wanted to know how I can manipulate data sent by the form. I have the following form: class CreateNewUser(forms.Form): Nome = forms.CharField(max_length=200) email =…
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answer452
viewsProblems transforming file into an array of bytes
Good evening, I’m trying to get a pdf file from a xhtml, and when it comes to saving it in the bank, I want to turn it into an array of bytes, for this, in my DAO I do so: public boolean…
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answers155
viewsHow do I play an input value without submitting a form or button
Hi, I wanted to get the input value "codigo_cat" and play in the variable $id_categoria that is at the bottom of the code PHP, to be able to run select using this variable as parameter. By method…
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answer22
viewsHow to print in a select in a jsp one list within another?
<div align="center"> <table border="1" cellpadding="5"> <caption> <h2>Lista de Usuarios</h2> </caption> <tr> <th>CPF</th>…
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answer23
viewsAreas - How to make a directory appear before Controller/Action/ on the route?
Hello. I created a web project ASP.NET MVC Core in the Visual Studio 2019 and I created an area called Managerial. Inside it, in the Views folder I created a subfolder called Products and put some…
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answer146
viewsHow do I run a web routine within Tkinter without crashing the mainloop?
Good day I created an application by Tkinter and now I’m trying to make the information on the web available to users in real time. The problem is that the app.run function does not let you run the…
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answer63
viewsSave values in session to show the total sum dynamically
Good night. I have a problem which is as follows; I have a form which is generated by a foreach, where it shows ticket values. In this form you can add the amount you want to buy from multiple…
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answer30
viewsCluster Problems - WEB Development
I am learning and developing a web report that should be grouped in order of production, but I have the field "Resource Consumed" that prevents me this grouping and repeats the production orders: […
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answer19
viewsCode error, buttons are doing the same form input functions
I am making a code in php and I am having a problem, the buttons (which would be to delete and Abir a PDF file) are doing the same function as the form Input, I would like to know how I could solve…
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answers72
viewsPass variables by routes
Hello, I’m creating a website in Laravel for the first time, and is a website in 3 different languages. In partials, he owns the header, that has the option of the 3 languages, when I click on one,…
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answer57
viewsTrunc Hibernate
I have the following query that I need to search in the database for schedules according to the dates reported (initial date and final date). Let’s say I made an appointment for the 20th/10th/19th.…
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answer248
viewsStyling components in React
I am starting my studies/development with React but I have a problem in the stylization of the components. Even though importing the CSS file into my component, the style is not picking up. How can…
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answer43
viewsUse the form action correctly
I am simply trying to use a form to insert a comment inside another page, however, I can not call it to perform the proper operations of Insert in the table that shows the comments. It normally…
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answer362
viewsHow to call a function in an HTML form?
Hello, I need help, I am creating a javascript program that should receive input data (Height and width) via form HTML and then call a function that uses this data to calculate and display the total…
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answers1050
viewsUse jQuery in a JS file
I’m a beginner and I would like a help if possible... I have file index.html, which I’m importing the jQuery: <script…
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answer281
viewsRouting Vue Js
I am creating more than one route in Vue js, however, for any given route is redirected to Login. js router. import Vue from 'vue' import Router from 'vue-router' import Login from…