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How to add textbox data to the grid temporarily using knockout.js?

Gautam Ramesh14630-Apr-2023

How to add textbox data to the grid temporarily using knockout.js?

javascriptknockout.js 
Updated on 19-Oct-2023
Gautam Ramesh

Gautam Ramesh

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I am Gautam Ramesh from Uttar Pradesh. Have completed my B. Tech. course from MNNIT campus Prayagraj in 2022. I have good knowledge of computer networking.

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Aryan Kumar

Aryan Kumar

19-Oct-2023

To add textbox data to a grid temporarily using Knockout.js, you can follow these steps:

1. Set Up Your HTML: Create an HTML structure for your grid and a textbox where users can input data. Here's a simple example:

<!DOCTYPE html>
<html>
<head>
    <title>Add TextBox Data to a Grid with Knockout.js</title>
</head>
<body>
    <div>
        <h2>Add Data to the Grid</h2>
        <input type="text" data-bind="value: newItemText, event: { keyup: addItem }" placeholder="Type something and press Enter">
        <button data-bind="click: addItem">Add</button>
        <ul data-bind="foreach: items">
            <li data-bind="text: $data"></li>
        </ul>
    </div>
</body>
</html>

In this HTML, we have an input element for entering data, a button to trigger the addition, and an unordered list (<ul>) for displaying the items in the grid.

2. Include Knockout.js: Just like in the previous example, include the Knockout.js library by adding this script tag in the <head> section of your HTML:

<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.5.1/knockout-min.js"></script>

3. Create a ViewModel: Define a ViewModel that holds the data and logic for your grid. In this case, you'll need to track the entered items and provide a function to add them to the grid temporarily:

function GridViewModel() {
    // Observable for the input text
    this.newItemText = ko.observable('');

    // Observable array to hold the items
    this.items = ko.observableArray([]);

    // Function to add a new item to the grid
    this.addItem = function () {
        var newItem = this.newItemText();
        if (newItem) {
            this.items.push(newItem);
            this.newItemText(''); // Clear the input textbox
        }
    }.bind(this);
}

// Apply Knockout bindings
ko.applyBindings(new GridViewModel());

The ViewModel defines an observable for the input text, an observable array to store the grid items, and a function addItem that adds a new item to the grid when the user presses Enter or clicks the "Add" button.

4. Apply Knockout Bindings: The data-bind attribute in the HTML binds the input value, the click event, and the foreach loop to the corresponding properties and methods in the ViewModel.

Now, when you type something in the textbox and press Enter or click "Add," the entered data will be temporarily added to the grid. The textbox will also be cleared for the next entry.

This example demonstrates how to add data temporarily to a grid using Knockout.js. You can further enhance this by implementing features like editing, deleting, or persisting the data if needed.

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