HTML is a powerful language that allows us to create visually appealing and interactive web pages. One of its key features is the ability to format and structure content using various tags. In this article, we will explore how we can use HTML tags to filter a DataGrid using a Textbox.
DataGrids are a common element in web development, used to display tabular data in a structured and organized manner. However, as the amount of data in a DataGrid increases, it can become challenging for users to find specific information. This is where filtering comes in handy.
Filtering allows users to search through the DataGrid and display only the data that meets certain criteria. In our case, we will use a Textbox to enter a search query and filter the DataGrid accordingly.
To begin, let's create a basic HTML structure for our page. We will use a div with the class "container" to contain all our elements.
<div class="container">
<!-- DataGrid and Textbox will go here -->
</div>
Next, we will add a DataGrid to our page using the <table> tag. The <table> tag is used to create a table in HTML, and it consists of <tr> (table row) and <td> (table data) tags to define the rows and columns of the table.
<table>
<tr>
<th>ID</th>
<th>Name</th>
<th>Age</th>
</tr>
<tr>
<td>1</td>
<td>John</td>
<td>25</td>
</tr>
<tr>
<td>2</td>
<td>Jane</td>
<td>30</td>
</tr>
<tr>
<td>3</td>
<td>Mark</td>
<td>35</td>
</tr>
</table>
As you can see, we have a simple DataGrid with three columns: ID, Name, and Age. Now, let's add a Textbox above the DataGrid to allow users to enter their search query.
<input type="text" placeholder="Search">
We have used the <input> tag to create a Textbox, and the "type" attribute is set to "text" to specify that it is a text input field. The "placeholder" attribute adds some text inside the Textbox to guide the user.
Now, we need to add some functionality to our Textbox. We will use JavaScript to handle the user's input and filter the DataGrid accordingly. First, we need to give our Textbox an id so that we can target it in our JavaScript code.
<input type="text" placeholder="Search" id="search-box">
Next, we will add a script tag to our HTML to write our JavaScript code.
<script>
// get the Textbox element
var searchBox = document.getElementById("search-box");
// add an event listener to the Textbox
searchBox.addEventListener("keyup", function(event) {
// get the user's input
var searchQuery = event.target.value.toUpperCase();
// get all the rows in the DataGrid
var rows = document.getElementsByTagName("tr");
// loop through each row
for (var i = 0; i < rows.length; i++) {
// get the data cells in each row
var cells = rows[i].getElementsByTagName("td");
// loop through each cell
for (var j = 0; j < cells.length; j++) {
// check if the cell's text matches the user's input
if (cells[j].innerHTML.toUpperCase().indexOf(searchQuery) > -1) {
// display the row if there is a match
rows[i].style.display = "";
// exit the loop
break;
} else {
// hide the row if there is no match
rows[i].style.display = "none";
}
}
}
});
</script>
Let's break down the code. We start by getting the Textbox element using its id. Then, we add an event listener to the Textbox that listens for the "keyup" event, which is triggered every time the user releases a key while typing. Inside the event listener, we get the user's input and convert it to uppercase to make it case-insensitive. Next, we get all the rows in the DataGrid and loop through each row. Within the loop, we get all the data cells in each row and loop through them. We then check if the cell's text contains the user's input. If there is a match, we display the row; otherwise, we hide it. Finally, we use the "break" keyword to exit the loop once we find a match.
