How to Convert Excel file into JSON by using Angular | JavaScript | JSON

Initially, when I started working on this requirement, people suggested using any one of the backend libraries to read and convert the excel data into JSON objects. But it is difficult to send requests to the server every time. On the other hand, it was really easy to convert the excel file on the client into a JSON object by using pure JavaScript.
There is a JavaScript plugin XSLX that can be used to read excel files as binary strings and to convert them into JSON objects.

We can read the data in the excel file by using a file reader as a binary string in JavaScript. Then we use XLSX which has a built-in facility of SheetJS to convert our binary string into a JSON object.

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#angular #javascript #excel

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How to Convert Excel file into JSON by using Angular | JavaScript | JSON

Initially, when I started working on this requirement, people suggested using any one of the backend libraries to read and convert the excel data into JSON objects. But it is difficult to send requests to the server every time. On the other hand, it was really easy to convert the excel file on the client into a JSON object by using pure JavaScript.
There is a JavaScript plugin XSLX that can be used to read excel files as binary strings and to convert them into JSON objects.

We can read the data in the excel file by using a file reader as a binary string in JavaScript. Then we use XLSX which has a built-in facility of SheetJS to convert our binary string into a JSON object.

Subscribe: https://www.youtube.com/c/CodePro-Jayanth/featured

#angular #javascript #excel

Data Validation in Excel

Data Validation in Excel

In this tutorial, let’s discuss what data validation is and how it can be implemented in MS-Excel. Let’s start!!!

What Is Data Validation in Excel?

Data Validation is one of the features in MS-Excel which helps in maintaining the consistency of the data in the spreadsheet. It controls the type of data that can enter in the data validated cells.

Data Validation in MS Excel

Now, let’s have a look at how data validation works and how to implement it in the worksheet:

To apply data validation for the cells, then follow the steps.

1: Choose to which all cells the validation of data should work.

2: Click on the DATA tab.

3: Go to the Data Validation option.

4: Choose the drop down option in it and click on the Data Validation.

Once you click on the data validation menu from the ribbon, a box appears with the list of data validation criteria, Input message and error message.

Let’s first understand, what is an input message and error message?

Once, the user clicks the cell, the input message appears in a small box near the cell.

If the user violates the condition of that particular cell, then the error message pops up in a box in the spreadsheet.

The advantage of both the messages is that the input and as well as the error message guide the user about how to fill the cells. Both the messages are customizable also.

Let us have a look at how to set it up and how it works with a sample

#ms excel tutorials #circle invalid data in excel #clear validation circles in excel #custom data validation in excel #data validation in excel #limitation in data validation in excel #setting up error message in excel #setting up input message in excel #troubleshooting formulas in excel #validate data in excel

How to Convert Excel File Into JSON Object by Using JavaScript

This video tells how to convert an excel file into a JSON object by using JavaScript. How to convert Excel File (xlsx, xls) to JSON with Javascript using XLSX (inbuilt functionality of sheetJS) library.

Source Code: https://github.com/jayanthbabu123/excel-to-json-by-javascript

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#javascript #excel #json

4 Easy Steps to Export Excel Files to JSON Using C#

Syncfusion Excel (XlsIO) Library is a .NET Excel library that allows users to convert Excel documents to various file formats such as PDF, image, HTML, ODS, and JSON. Among them, the Excel-to-JSON conversion is supported from the 18.3 version onward. The resultant JSON files can be bound to any control in any platform. This is one of the major advantages for users.

In this blog, we are going to see how an Excel file can be converted to a JSON stream in C## using the Syncfusion XlsIO library. We’ll also look at the procedure to bind the JSON stream to a Syncfusion DataGrid control. The following options are available in the Excel to JSON conversion:

• Excel workbook to a JSON file.
• Excel worksheet to a JSON file.
• Excel worksheet range to a JSON file.

#c# #excel #file formats #tips and tricks #excel library #excel to json

Basics of Angular: Part-1

What is Angular? What it does? How we implement it in a project? So, here are some basics of angular to let you learn more about angular.

Angular is a Typescript-based open-source front-end web application platform. The Angular Team at Google and a community of individuals and corporations lead it. Angular lets you extend HTML’s syntax to express your apps’ components clearly. The angular resolves challenges while developing a single page and cross-platform applications. So, here the meaning of the single-page applications in angular is that the index.html file serves the app. And, the index.html file links other files to it.

We build angular applications with basic concepts which are NgModules. It provides a compilation context for components. At the beginning of an angular project, the command-line interface provides a built-in component which is the root component. But, NgModule can add a number of additional components. These can be created through a template or loaded from a router. This is what a compilation context about.

What is a Component in Angular?

Components are key features in Angular. It controls a patch of the screen called a view. A couple of components that we create on our own helps to build a whole application. In the end, the root component or the app component holds our entire application. The component has its business logic that it does to support the view inside the class. The class interacts with the view through an API of properties and methods. All the components added by us in the application are not linked to the index.html. But, they link to the app.component.html through the selectors. A component can be a component and not only a typescript class by adding a decorator @Component. Then, for further access, a class can import it. The decorator contains some metadata like selector, template, and style. Here’s an example of how a component decorator looks like:

@Component({
    selector: 'app-root',
    templateUrl: 'app.component.html',
    styleUrls: ['app.component.scss']
})

Role of App Module

Modules are the package of functionalities of our app. It gives Angular the information about which features does my app has and what feature it uses. It is an empty Typescript class, but we transform it by adding a decorator @NgModule. So, we have four properties that we set up on the object pass to @NgModule. The four properties are declarations, imports, providers, and bootstrap. All the built-in new components add up to the declarations array in @NgModule.

@NgModule({
declarations: [
  AppComponent,
],
imports: [
  BrowserModule,
  HttpClientModule,
  AppRoutingModule,
  FormsModule
],
bootstrap: [AppComponent]
})

What is Data Binding?

Data Binding is the communication between the Typescript code of the component and the template. So, we have different kinds of data binding given below:

• When there is a requirement to output data from our Typescript code in the HTML template. String interpolation handles this purpose like {{data}} in HTML file. Property Binding is also used for this purpose like [property] = “data”.
• When we want to trigger any event like clicking a button. Event Binding works while we react to user events like (event) = “expression”.
• When we can react to user events and output something at the same time. Two-way Binding is used like [(ngModel)] = “data”.

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