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Working with Text Formatting in ASP.NET MVC DocumentEditor control

22 Jul 2021 / 3 minutes to read

Document editor supports several formatting options for text like bold, italic, font color, highlight color, and more. This section describes how to modify the formatting for selected text in detail.

Bold

The bold formatting for selected text can be get or set by using the following sample code.

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//Gets the value for bold formatting of selected text.
let bold : boolean = documenteditor.selection.characterFormat.bold;
//Sets bold formatting for selected text.
documenteditor.selection.characterFormat.bold = true;

You can toggle the bold formatting based on existing value at selection. Refer to the following sample code.

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**documenteditor.editor.toggleBold();

Italic

The Italic formatting for selected text can be get or set by using the following sample code.

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documenteditor.selection.characterFormat.italic= true|false;

You can toggle the Italic formatting based on existing value at selection. Refer to the following sample code.

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documenteditor.editor.toggleItalic();

Underline property

The underline style for selected text can be get or set by using the following sample code.

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documenteditor.selection.characterFormat.underline='Single' | 'None';

You can toggle the underline style of selected text based on existing value at selection by specifying a value. Refer to the following sample code.

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documenteditor.editor.toggleUnderline('Single');

Strikethrough property

The strikethrough style for selected text can be get or set by using the following sample code.

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documenteditor.selection.characterFormat.strikethrough='Single' | 'Normal';

You can toggle the strikethrough style of selected text based on existing value at selection by specifying a value. Refer to the following sample code.

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documenteditor.editor.toggleStrikethrough();

Superscript property

The selected text can be made superscript by using the following sample code.

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documenteditor.selection.characterFormat.baselineAlignment='Superscript';

Toggle the selected text as superscript or normal using the following sample code.

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documenteditor.editor.toggleSuperscript();

Subscript property

The selected text can be made subscript by using the following sample code.

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documenteditor.selection.characterFormat.baselineAlignment='Subscript';

Toggle the selected text as subscript or normal using the following sample code.

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documenteditor.editor.toggleSubscript();

You can make a subscript or superscript text as normal using the following code.

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documenteditor.selection.characterFormat.baselineAlignment='Normal';

Size

The size of selected text can be get or set using the following code.

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documenteditor.selection.characterFormat.fontSize= 32;

Color

The color of selected text can be get or set using the following code.

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documenteditor.selection.characterFormat.fontColor= 'Pink';
documenteditor.selection.characterFormat.fontColor= '#FFC0CB';

Font

The font style of selected text can be get or set using the following sample code.

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documenteditor.selection.characterFormat.fontFamily= 'Arial';

Highlight color

The highlight color of the selected text can be get or set using the following sample code.

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documenteditor.selection.characterFormat.highlightColor= 'Pink';
documenteditor.selection.characterFormat.highlightColor= '#FFC0CB';

Toolbar with options for text formatting

Refer to the following example.

razor
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<div id="toolbar"></div>
<div id="documenteditor" style="width:100%;height:100%">
    @Html.EJS().DocumentEditor("container").IsReadOnly(false).EnableEditor(true).EnableSelection(true).EnableSfdtExport(true).EnableContextMenu(true).EnableEditorHistory(true).Render()
</div>

<script>
    var documenteditor;
    document.addEventListener('DOMContentLoaded', function () {

        documenteditor = document.getElementById("container").ej2_instances[0];
        documenteditor.resize();
        updateContainerSize();
        function toolbarButtonClick(arg) {
            switch (arg.item.id) {
                case 'bold':
                    //Toggles the bold of selected content
                    documenteditor.editor.toggleBold();
                    break;
                case 'italic':
                    //Toggles the Italic of selected content
                    documenteditor.editor.toggleItalic();
                    break;
                case 'underline':
                    //Toggles the underline of selected content
                    documenteditor.editor.toggleUnderline('Single');
                    break;
                case 'strikethrough':
                    //Toggles the strikethrough of selected content
                    documenteditor.editor.toggleStrikethrough();
                    break;
                case 'subscript':
                    //Toggles the subscript of selected content
                    documenteditor.editor.toggleSubscript();
                    break;
                case 'superscript':
                    //Toggles the superscript of selected content
                    documenteditor.editor.toggleSuperscript();
                    break;
            }
        }
        function updateContainerSize() {
            document.getElementById('container').style.height =
                window.innerHeight - document.getElementById('toolbar').offsetHeight + 'px';
        }
        //To change the font Style of selected content
        function changeFontFamily(args) {
            documenteditor.selection.characterFormat.fontFamily = args.value;
            documenteditor.focusIn();
        }
        //To Change the font Size of selected content
        function changeFontSize(args) {
            documenteditor.selection.characterFormat.fontSize = args.value;
            documenteditor.focusIn();
        }
        //To Change the font Color of selected content
        function changeFontColor(args) {
            documenteditor.selection.characterFormat.fontColor = args.currentValue.hex;
            documenteditor.focusIn();
        }
        documenteditor.selectionChange = function () {
            setTimeout(function () { onSelectionChange(); }, 20);
        };
        //Selection change to retrieve formatting
        function onSelectionChange() {
            if (documenteditor.selection) {
                enableDisableFontOptions();
                // #endregion
            }
        }
        function enableDisableFontOptions() {
            var characterformat = documenteditor.selection.characterFormat;
            var properties = [characterformat.bold, characterformat.italic, characterformat.underline, characterformat.strikeThrough];
            var toggleBtnId = ["bold", "italic", "underline", "strikethrough"];
            for (var i = 0; i < properties.length; i++) {
                changeActiveState(properties[i], toggleBtnId[i]);
            }
        }
        function changeActiveState(property, btnId) {
            var toggleBtn = document.getElementById(btnId);
            if ((typeof (property) == 'boolean' && property == true) || (typeof (property) == 'string' && property !== 'None'))
                toggleBtn.classList.add("e-btn-toggle");
            else {
                if (toggleBtn.classList.contains("e-btn-toggle"))
                    toggleBtn.classList.remove("e-btn-toggle");
            }
        }
        var fontStyle = ['Algerian', 'Arial', 'Calibri', 'Cambria', 'Cambria Math', 'Candara', 'Courier New', 'Georgia', 'Impact', 'Segoe Print', 'Segoe Script', 'Segoe UI', 'Symbol', 'Times New Roman', 'Verdana', 'Windings'
        ];
        var fontSize = ['8', '9', '10', '11', '12', '14', '16', '18',
            '20', '22', '24', '26', '28', '36', '48', '72', '96'];
        var toolBar = new ej.navigations.Toolbar({
            clicked: toolbarButtonClick,
            items: [
                {
                    prefixIcon: 'e-de-icon-Bold',
                    tooltipText: 'Bold',
                    id: 'bold',
                },
                {
                    prefixIcon: 'e-de-icon-Italic',
                    tooltipText: 'Italic',
                    id: 'italic',
                },
                {
                    prefixIcon: 'e-de-icon-Underline',
                    tooltipText: 'Underline',
                    id: 'underline',
                },
                {
                    prefixIcon: 'e-de-icon-Strikethrough',
                    tooltipText: 'Strikethrough',
                    id: 'strikethrough',
                },
                {
                    prefixIcon: 'e-de-icon-Subscript',
                    tooltipText: 'Subscript',
                    id: 'subscript',
                },
                {
                    prefixIcon: 'e-de-icon-Superscript',
                    tooltipText: 'Superscript',
                    id: 'superscript',
                },
                { type: 'Seperator' },
                {
                    type: 'Input',
                    template: new ColorPicker({
                        value: '#000000',
                        showButtons: true,
                        change: changeFontColor
                    }),
                },
                { type: 'Seperator' },
                {
                    type: 'Input',
                    template: new ComboBox({
                        dataSource: fontStyle,
                        width: 120,
                        index: 2,
                        allowCustom: true,
                        change: changeFontFamily,
                        showClearButton: false,
                    }),
                },
                {
                    type: 'Input',
                    template: new ComboBox({
                        dataSource: fontSize,
                        width: 80,
                        allowCustom: true,
                        index: 2,
                        change: changeFontSize,
                        showClearButton: false,
                    }),
                },
            ],
        });
        toolBar.appendTo('#toolbar');
    });
</script>

<style>
    #container {
        width: 100%;
        height: 100%
    }
</style>

See Also