Getting Started with ASP.NET Core Tooltip Control

22 Apr 20225 minutes to read

This section briefly explains about how to include ASP.NET Core Tooltip control in your ASP.NET Core application using Visual Studio.

Prerequisites

System requirements for ASP.NET Core controls

Create ASP.NET Core web application with Razor pages

Install ASP.NET Core package in the application

Syncfusion ASP.NET Core controls are available in nuget.org. Refer to NuGet packages topic to learn more about installing NuGet packages in various OS environments. To add ASP.NET Core controls in the application, open the NuGet package manager in Visual Studio (Tools → NuGet Package Manager → Manage NuGet Packages for Solution), search for Syncfusion.EJ2.AspNet.Core and then install it.

The Syncfusion.EJ2.AspNet.Core NuGet package has dependencies, Newtonsoft.Json for JSON serialization and Syncfusion.Licensing for validating Syncfusion license key.

Add Syncfusion ASP.NET Core Tag Helper

Open ~/Views/_ViewImports.cshtml file and import the Syncfusion.EJ2 TagHelper.

@addTagHelper *, Syncfusion.EJ2

Add style sheet

Checkout the Themes topic to learn different ways (CDN, NPM package, and CRG) to refer styles in ASP.NET Core application, and to have the expected appearance for Syncfusion ASP.NET Core controls. Here, the theme is referred using CDN inside the <head> of ~/Pages/Shared/_Layout.cshtml file as follows,

<head>
    ...
    <!-- Syncfusion ASP.NET Core controls styles -->
    <link rel="stylesheet" href="https://cdn.syncfusion.com/ej2/20.1.55/fluent.css" />
</head>

Add script reference

In this getting started walk-through, the required scripts are referred using CDN inside the <head> of ~/Pages/Shared/_Layout.cshtml file as follows,

<head>
    ...
    <!-- Syncfusion ASP.NET Core controls scripts -->
    <script src="https://cdn.syncfusion.com/ej2/20.1.55/dist/ej2.min.js"></script>
</head>

Register Syncfusion Script Manager

Open ~/Pages/Shared/_Layout.cshtml page and register the script manager at the end of `<body>` in the ASP.NET Core application as follows.

<body>
    ....
    ....
    <!-- Syncfusion ASP.NET Core Script Manager -->
    <ejs-scripts></ejs-scripts>
</body>

Add ASP.NET Core Tooltip control

Now, add the Syncfusion ASP.NET Core Tooltip tag helper in ~/Pages/Index.cshtml page.

<ejs-tooltip id="Tooltip" content="Lets go green & Save Earth !!!">
    <!-- Target element -->
    <e-content-template>
        <span id='target'>Show Tooltip</span>
    </e-content-template>
</ejs-tooltip>

<style>
    #Tooltip {
        position: absolute;
        left: calc( 50% - 60px);
        top: 38%;
    }

</style>

In the above sample code, #target is the id of the element in a page to which the Tooltip is initialized.

Press Ctrl+F5 (Windows) or ⌘+F5 (macOS) to run the app. Then, the Syncfusion ASP.NET Core Tooltip control will be rendered in the default web browser.

ASP.NET Core Tooltip Control

Initialize Tooltip within a container

You can create Tooltips on multiple targets within a container. To do so, you have to define specific target elements to the target property so that the Tooltip is initialized only on matched targets within a container. In this case, the Tooltip content is assigned from the title attribute of the target element.

Refer to the following code example to create a Tooltip on multiple targets within a container.

<ejs-tooltip id="details" position="RightCenter" target=".e-info">
	<e-content-template>
		<form id="details" role="form">
			<table>
				<tr>
					<td class="info"> User Name:</td>
					<td> <input type="text" class="e-info" name="firstname" title="Please enter your name"> </td>
				</tr>
				<tr>
					<td class="info"> Email Address:</td>
					<td> <input type="text" class="e-info" name="email" title="Enter a valid email address"></td>
				</tr>
				<tr>
					<td class="info"> Password:</td>
					<td> <input type="password" class="e-info" name="password" title="Be at least 8 characters length"></td>
				</tr>
				<tr>
					<td class="info"> Confirm Password:</td>
					<td> <input type="password" class="e-info" name="Cpwd" title="Re-enter your password"></td>
				</tr>
			</table>
			<input id="sample" type="submit" value="Submit">
			<input id="clear" type="reset" value="Reset">
		</form>
	</e-content-template>
</ejs-tooltip>

<style>
    #container {
        visibility: hidden;
    }

    #loader {
        color: #008cff;
        height: 40px;
        left: 45%;
        position: absolute;
        top: 45%;
        width: 30%;
    }

    #details table th, #details table td {
        padding: 15px;
        text-align: left;
    }

    #details .info {
        font-weight: bold;
    }
 
</style>

ASP.NET Core Tooltip with Accessibility

In the above sample, #details refers to the container’s id, and the target .e-info refers to the target elements available within that container.

View Sample in GitHub.

See also