Syncfusion ASP.NET Core Popups

Dialog

This skill documents how to implement, configure, and customize the Syncfusion Dialog in ASP.NET Core applications using the <ejs-dialog> Tag Helper API. It covers setup, modality, positioning, animations, templates, events, accessibility, and styling.

Quick Links

[API Reference](references/dialog-api.md)
[Getting Started](references/dialog-getting-started.md)
[Basic Features](references/dialog-basic-features.md)
[Positioning & Sizing](references/dialog-positioning-and-sizing.md)
[Animations & Transitions](references/dialog-animations-and-transitions.md)
[Templates](references/dialog-templates.md)
[Accessibility & Localization](references/dialog-accessibility-and-localization.md)
[Events & Interactions](references/dialog-events-and-interactions.md)
[Styling & Themes](references/dialog-styling-and-themes.md)

Quick Start (Tag Helper)

In your Razor view:

@using Syncfusion.EJ2

<ejs-dialog id="dialog" header="Welcome" isModal="true" width="500px">
    <e-content-template>
        <p>This is a basic dialog with default settings.</p>
    </e-content-template>
</ejs-dialog>

<script>
    window.onload = function () {
        document.getElementById('openBtn').onclick = function () {
            document.getElementById('dialog').ej2_instances[0].show();
        };
    };
</script>

Ensure you include the script manager and styles in your layout (_Layout.cshtml):

<!-- In <head> -->
<link rel="stylesheet" href="https://cdn.syncfusion.com/ej2/{{ site.ej2version }}/fluent.css" />

<!-- At end of <body> -->
<script src="https://cdn.syncfusion.com/ej2/{{ site.ej2version }}/dist/ej2.min.js"></script>
<ejs-scripts></ejs-scripts>

Common Patterns

Modal Confirmation Dialog

<ejs-dialog id="confirmDialog" header="Confirm Action" isModal="true" width="400px">
    <e-dialog-buttons>
        <e-dialog-dialogbutton content="Yes" isPrimary="true" click="confirmAction"></e-dialog-dialogbutton>
        <e-dialog-dialogbutton content="No" click="closeDialog"></e-dialog-dialogbutton>
    </e-dialog-buttons>
    <e-content-template>
        <p>Are you sure you want to proceed?</p>
    </e-content-template>
</ejs-dialog>

Draggable Dialog with Header

<ejs-dialog id="draggableDialog" 
    header="Drag Me" 
    allowDragging="true" 
    width="500px" 
    showCloseIcon="true">
    <e-content-template>
        <p>Grab the header to drag this dialog.</p>
    </e-content-template>
</ejs-dialog>

Centered Dialog

<ejs-dialog id="centeredDialog" 
    header="Centered Position" 
    width="500px">
    <e-dialog-position x="center" y="center"></e-dialog-position>
    <e-content-template>
        <p>This dialog is centered on the page.</p>
    </e-content-template>
</ejs-dialog>

Key Properties

Tag Helper Attribute	Type	Purpose	Example
`header`	string	Dialog title bar text	`header="Confirm Delete"`
`isModal`	bool	Shows overlay behind dialog	`isModal="true"`
`width`	string	Dialog width (px, %)	`width="500px"`
`height`	string	Dialog height (px, %)	`height="300px"`
`minHeight`	string	Minimum dialog height	`minHeight="150px"`
`allowDragging`	bool	Enable drag to reposition	`allowDragging="true"`
`enableResize`	bool	Enable end-user resizing	`enableResize="true"`
`showCloseIcon`	bool	Display close (X) button	`showCloseIcon="true"`
`closeOnEscape`	bool	Close on Escape key	`closeOnEscape="true"`
`visible`	bool	Initial visibility	`visible="false"`
`target`	string	Target container selector	`target="#container"`
`cssClass`	string	Custom CSS class(es)	`cssClass="my-dialog"`
`enableRtl`	bool	Right-to-left rendering	`enableRtl="true"`
`enablePersistence`	bool	Persist state on reload	`enablePersistence="true"`
`zIndex`	double	Z-order stacking level	`zIndex="2000"`
`<e-dialog-position>`	DialogPositionData	X/Y positioning	`x="center" y="center"`
`<e-dialog-animationsettings>`	DialogAnimationSettings	Open/close animation	`effect="Zoom" duration="400"`
`footerTemplate`	string	Custom footer HTML string	`footerTemplate="<span>...</span>"`

Removed invalid APIs: is-hidden (use visible="false"), position-x/position-y flat attributes (use <e-dialog-position>), allow-resizing (use enable-resize), max-height, max-width, min-width (not supported).

Next Steps

Read getting-started.md for full installation steps, NuGet package setup, and configuration details.

Predefined Dialog

Predefined dialogs are opened imperatively using the DialogUtility JavaScript utility class. They provide ready-to-use alert, confirm, and prompt dialogs without component setup. Use predefined dialogs for quick notifications and user confirmations.

Key Concept

Predefined dialogs are not Tag Helper components. They are invoked via JavaScript:

ej.popups.DialogUtility.alert({ ... });
ej.popups.DialogUtility.confirm({ ... });

Quick Start

<button class="e-btn e-danger" onclick="showAlert()">Alert</button>

<script>
    function showAlert() {
        ej.popups.DialogUtility.alert({
            title: 'Low Battery',
            width: '250px',
            content: '10% of battery remaining'
        });
    }
</script>

Documentation Guide

Getting Started

📄 Read: [references/predefineddialog-getting-started.md](references/predefineddialog-getting-started.md)

Installation and setup
Alert, Confirm, and Prompt basic examples
JavaScript invocation patterns

Position

📄 Read: [references/predefineddialog-position.md](references/predefineddialog-position.md)

position property with X/Y values
Center, top, bottom, left, right positioning
Custom pixel offsets

Animation

📄 Read: [references/predefineddialog-animation.md](references/predefineddialog-animation.md)

animationSettings with effect, duration, delay
Alert, Confirm, Prompt animation examples

Draggable

📄 Read: [references/predefineddialog-draggable.md](references/predefineddialog-draggable.md)

isDraggable boolean property
Dialog drag-to-reposition examples

Dimension

📄 Read: [references/predefineddialog-dimension.md](references/predefineddialog-dimension.md)

width and height properties
cssClass for size constraints (min-width, max-width)

Customization

📄 Read: [references/predefineddialog-customization.md](references/predefineddialog-customization.md)

okButton / cancelButton customization
showCloseIcon and closeOnEscape
Custom content with HTML strings

API Reference

📄 Read: [references/predefineddialog-api.md](references/predefineddialog-api.md)

Full DialogUtility.alert() / confirm() option properties
All supported fields and types

Common Patterns

Alert Dialog:

ej.popups.DialogUtility.alert({
    title: 'Info',
    content: 'Operation complete.',
    width: '250px'
});

Confirm Dialog:

var dialogObj = ej.popups.DialogUtility.confirm({
    title: 'Delete?',
    content: 'Are you sure?',
    width: '300px',
    okButton: { text: 'Yes', click: function() { /* delete */ dialogObj.hide(); } },
    cancelButton: { text: 'No', click: function() { dialogObj.hide(); } }
});

Prompt Dialog:

var dialogObj = ej.popups.DialogUtility.confirm({
    title: 'Enter Name',
    content: '<p>Your name:</p><input id="nameInput" class="e-input" placeholder="Type here..." />',
    width: '300px',
    okButton: { text: 'Submit', click: function() { var val = document.getElementById('nameInput').value; dialogObj.hide(); } },
    cancelButton: { click: function() { dialogObj.hide(); } }
});

Tooltip

A tooltip component that displays helpful information or hints when users hover over, click, or focus on an element. The <ejs-tooltip> Tag Helper provides flexible positioning, animations, multiple trigger modes, and accessibility features.

Package: Syncfusion.EJ2.AspNet.Core Tag Helper: <ejs-tooltip>

Quick Start

<ejs-tooltip id="tooltip" target="#target" position="TopCenter" content="Tooltip Content">
    <e-content-template>
        <button class="e-btn" id="target">Show Tooltip</button>
    </e-content-template>
</ejs-tooltip>

Documentation Guide

Getting Started & Setup

📄 Read: [references/tooltip-getting-started.md](references/tooltip-getting-started.md)

Installation and CSS imports
Basic tooltip on a single element
Multi-target tooltips with title attributes
Running the application

Content

📄 Read: [references/tooltip-content.md](references/tooltip-content.md)

String content and HTML markup
Template content via <e-content-template>
Dynamic content via beforeRender event
HTML sanitization for security

Positioning

📄 Read: [references/tooltip-positioning.md](references/tooltip-positioning.md)

12 static positions (TopLeft, TopCenter, TopRight, BottomLeft, etc.)
Tip pointer positioning (Start, Middle, End)
Dynamic positioning with refresh() method
Offset values (offsetX, offsetY)
Collision handling (windowCollision)

Open Modes

📄 Read: [references/tooltip-open-mode.md](references/tooltip-open-mode.md)

Auto, Hover, Click, Focus, Custom modes via opensOn
Combining multiple modes (e.g., opensOn="Hover Click")
Sticky mode (isSticky) with close button
Open/close delays (openDelay, closeDelay)

Animation

📄 Read: [references/tooltip-animation.md](references/tooltip-animation.md)

<e-tooltip-animationsettings> with open/close effects
7+ animation effects (FadeIn, ZoomIn, SlideUp, etc.)
Duration and delay configuration
Disable animations with effect: 'None'

Customization

📄 Read: [references/tooltip-customization.md](references/tooltip-customization.md)

cssClass for custom styling
Tip pointer visibility and customization
Dimensions (width, height)
RTL support (enableRtl)
Mouse trailing (mouseTrail)

Accessibility

📄 Read: [references/tooltip-accessibility.md](references/tooltip-accessibility.md)

WCAG 2.2 and Section 508 compliance
ARIA attributes (role, aria-describedby, aria-hidden)
Keyboard navigation (Tab, Escape)
Screen reader support and focus management
Best practices for accessible tooltips

API Reference

📄 Read: [references/tooltip-api.md](references/tooltip-api.md)

All properties with types and defaults
Methods: open(), close(), refresh(), destroy(), dataBind()
Events: BeforeRender, AfterOpen, AfterClose, Created, Destroyed
Position and TipPointerPosition enum values

Common Patterns

Basic Tooltip on Button:

<ejs-tooltip id="tooltip" target="#target" position="TopCenter" content="Submit the form">
    <e-content-template>
        <button class="e-btn" id="target">Submit</button>
    </e-content-template>
</ejs-tooltip>

Multi-Target Tooltip:

<ejs-tooltip id="tooltip" target=".info-icon" position="TopCenter">
    <e-content-template>
        <button class="e-btn info-icon" title="Information">Info 1</button>
        <button class="e-btn info-icon" title="Details">Info 2</button>
        <button class="e-btn info-icon" title="Help">Info 3</button>
    </e-content-template>
</ejs-tooltip>

Click-Triggered Sticky Tooltip:

<ejs-tooltip target="#target" content="Click the × to close me" 
    opensOn="Click" 
    isSticky="true" 
    position="BottomCenter">
    <e-content-template>
        <button id="target" class="e-btn">Click Me</button>
    </e-content-template>
</ejs-tooltip>

Programmatic Open/Close:

<ejs-tooltip id="tooltip" target="#target" content="Tooltip opened programmatically" opensOn="Custom">
    <e-content-template>
        <button id="target" class="e-btn" onclick="toggleTooltip()">Toggle Tooltip</button>
    </e-content-template>
</ejs-tooltip>

<script>
    function toggleTooltip() {
        var tooltipObj = document.getElementById('tooltip').ej2_instances[0];
        var btn = document.querySelector('.e-btn');
        
        if (btn.getAttribute('data-tooltip-open') === 'true') {
            tooltipObj.close();
            btn.setAttribute('data-tooltip-open', 'false');
        } else {
            tooltipObj.open(btn);
            btn.setAttribute('data-tooltip-open', 'true');
        }
    }
</script>

Key Properties at a Glance

Tag Helper Attr	Type	Default	Purpose
`content`	`string`	—	Tooltip text or HTML
`target`	`string`	—	CSS selector for multi-target mode
`position`	`Position`	`'TopCenter'`	12 placement values
`opensOn`	`string`	`'Auto'`	Hover / Click / Focus / Custom
`isSticky`	`bool`	`false`	Keep visible until user closes
`mouseTrail`	`bool`	`false`	Follow mouse cursor
`showTipPointer`	`bool`	`true`	Show/hide arrow tip
`tipPointerPosition`	`TipPointerPosition`	`'Auto'`	Auto / Start / Middle / End
`openDelay`	`number`	`0`	ms delay before opening
`closeDelay`	`number`	`0`	ms delay before closing
`offsetX` / `offsetY`	`number`	`0`	Distance from target (px)
`width` / `height`	`string \	number`	`'auto'`	Tooltip dimensions
`cssClass`	`string`	`null`	Custom CSS class
`enableRtl`	`bool`	`false`	Right-to-left rendering
`enableHtmlSanitizer`	`bool`	`true`	Sanitize HTML content
`windowCollision`	`bool`	`false`	Collision vs viewport

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SKILL.md

Syncfusion ASP.NET Core Popups

Dialog

Quick Links

Quick Start (Tag Helper)

Common Patterns

Modal Confirmation Dialog

Draggable Dialog with Header

Centered Dialog

Key Properties

Next Steps

Predefined Dialog

Key Concept

Quick Start

Documentation Guide

Getting Started

Position

Animation

Draggable

Dimension

Customization

API Reference

Common Patterns

Tooltip

Quick Start

Documentation Guide

Getting Started & Setup

Content

Positioning

Open Modes

Animation

Customization

Accessibility

API Reference

Common Patterns

Key Properties at a Glance