Toolbar in ASP.NET CORE Pdfviewer Component|Syncfusion

24 Jun 202424 minutes to read

The PDF Viewer comes with a powerful built-in toolbar to execute important actions such as page navigation, text search,view mode,download,print,bookmark, and thumbnails.

The following table shows built-in toolbar items and its actions:-

Option	Description
OpenOption	This option provides an action to load the PDF documents to the PDF Viewer.
PageNavigationTool	This option provides an action to navigate the pages in the PDF Viewer. It contains GoToFirstPage,GoToLastPage,GotoPage,GoToNext, and GoToLast tools.
MagnificationTool	This option provides an action to magnify the pages either with predefined or user defined zoom factors in the PDF Viewer. Contains ZoomIn, ZoomOut, Zoom, FitPage and FitWidth tools
PanTool	This option provides an action for panning the pages in the PDF Viewer.
SelectionTool	This option provides an action to enable/disable the text selection in the PDF Viewer.
SearchOption	This option provides an action to search a word in the PDF documents.
PrintOption	This option provides an action to print the PDF document being loaded in the PDF Viewer.
DownloadOption	This Download option provides an action to download the PDF document that has been loaded in the PDF Viewer.
UndoRedoTool	This tool provides options to undo and redo the annotation actions performed in the PDF Viewer.
AnnotationEditTool	This tool provides options to enable or disable the edit mode of annotation in the PDF Viewer.

The PDF Viewer has an option to show or hide the complete built-in toolbar. You can achieve this by using following two ways.,

Show/Hide toolbar using enableToolbar API as in the following code snippet

Standalone
Server-Backed
<div style="width:100%;height:600px">
    <ejs-pdfviewer id="pdfviewer"
                   style="height:600px"
                   documentPath="https://cdn.syncfusion.com/content/pdf/pdf-succinctly.pdf"
                   enableToolbar="false">
    </ejs-pdfviewer>
</div>
<div style="width:100%;height:600px">
    <ejs-pdfviewer id="pdfviewer"
                   style="height:600px"
                   serviceUrl="/api/PdfViewer"
                   documentPath="https://cdn.syncfusion.com/content/pdf/pdf-succinctly.pdf"
                   enableToolbar="false">
    </ejs-pdfviewer>
</div>

Show/Hide toolbar using showToolbar as in the following code snippet

Standalone
Server-Backed
<div style="width:100%;height:600px">
    <ejs-pdfviewer id="pdfviewer"
                   style="height:600px"
                   documentPath="https://cdn.syncfusion.com/content/pdf/pdf-succinctly.pdf"
                   documentLoad="showToolbar">
    </ejs-pdfviewer>
</div>

<script>
    function showToolbar() {
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
        pdfViewer.toolbar.showToolbar(false);
    }
</script>
<div style="width:100%;height:600px">
    <ejs-pdfviewer id="pdfviewer"
                   style="height:600px"
                   serviceUrl="/api/PdfViewer"
                   documentPath="https://cdn.syncfusion.com/content/pdf/pdf-succinctly.pdf"
                   documentLoad="showToolbar">
    </ejs-pdfviewer>
</div>

<script>
    function showToolbar() {
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
        pdfViewer.toolbar.showToolbar(false);
    }
</script>

Show/Hide the built-in toolbaritem

The PDF Viewer has an option to show or hide these grouped items in the built-in toolbar.

Show/Hide toolbaritem using toolbarSettings as in the following code snippet.

Standalone
Server-Backed
<div style="width:100%;height:600px">
    <ejs-pdfviewer id="pdfviewer"
                   style="height:600px"
                   documentPath="https://cdn.syncfusion.com/content/pdf/pdf-succinctly.pdf"
                   enableToolbar="true"
                   toolbarSettings="@(new Syncfusion.EJ2.PdfViewer.PdfViewerToolbarSettings  { ShowTooltip = true, ToolbarItems = "OpenOption"  })">
    </ejs-pdfviewer>
</div>
<div style="width:100%;height:600px">
    <ejs-pdfviewer id="pdfviewer"
                   style="height:600px"
                   serviceUrl="/api/PdfViewer"
                   documentPath="https://cdn.syncfusion.com/content/pdf/pdf-succinctly.pdf"
                   enableToolbar="true"
                   toolbarSettings="@(new Syncfusion.EJ2.PdfViewer.PdfViewerToolbarSettings { ShowTooltip = true, ToolbarItems = "OpenOption"  })">
    </ejs-pdfviewer>
</div>

Show/Hide toolbaritem using showToolbaritem as in the following code snippet

Standalone
Server-Backed
<div style="width:100%;height:600px">
    <ejs-pdfviewer id="pdfviewer"
                   style="height:600px"
                   documentPath="https://cdn.syncfusion.com/content/pdf/pdf-succinctly.pdf"
                   documentLoad="showToolbar">
    </ejs-pdfviewer>
</div>

<script>
    function showToolbar() {
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
        pdfViewer.toolbar.showToolbarItem(new Array("DownloadOption"), true);
    }
</script>
<div style="width:100%;height:600px">
    <ejs-pdfviewer id="pdfviewer"
                   style="height:600px"
                   serviceUrl="/api/PdfViewer"
                   documentPath="https://cdn.syncfusion.com/content/pdf/pdf-succinctly.pdf"
                   documentLoad="showToolbar">
    </ejs-pdfviewer>
</div>

<script>
    function showToolbar() {
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
        pdfViewer.toolbar.showToolbarItem(new Array("DownloadOption"), true);
    }
</script>

PDF Viewer allows you to customize(add, show, hide, enable, and disable) existing items in a toolbar.

Add - New items can defined by CustomToolbarItemModel and with existing items in ToolbarSettings property. Newly added item click action can be defined in toolbarclick.
Show, Hide - Existing items can be shown or hidden using the ToolbarSettings property. Pre-defined toolbar items are available with ToolbarItem.
Enable, Disable - Toolbar items can be enabled or disable using enabletoolbaritem.

Standalone
Server-Backed
<div>
    <ejs-pdfviewer id="pdfviewer"
                   style="width:1350px;height:100%"
                   documentPath="https://cdn.syncfusion.com/content/pdf/pdf-succinctly.pdf"
                   resourceUrl='https://cdn.syncfusion.com/ej2/24.1.41/dist/ej2-pdfviewer-lib'
                   toolbarClick="toolbarClick">
    </ejs-pdfviewer>
</div>

<script type="text/javascript">
    window.onload = function () {
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
        var toolItem1 = {
            prefixIcon: 'e-icons e-paste',
            id: 'print',
            tooltipText: 'Custom toolbar item',
            align: 'left'
        };
        var toolItem2 = {
            id: 'download',
            text: 'Save',
            tooltipText: 'Custom toolbar item',
            align: 'right'
        };
        var LanguageList = ['Typescript', 'Javascript', 'Angular', 'C#', 'C', 'Python'];
        var toolItem3 = {
            type: 'Input',
            tooltipText: 'Language List',
            cssClass: 'percentage',
            align: 'Left',
            id: 'dropdown',
            template: new ej.dropdowns.ComboBox({ width: 100, value: 'TypeScript', dataSource: LanguageList, popupWidth: 85, showClearButton: false, readonly: false })
        };
        var toolItem4 = {
            type: 'Input',
            tooltipText: 'Text',
            align: 'Right',
            cssClass: 'find',
            id: 'textbox',
            template: new ej.inputs.TextBox({ width: 125, placeholder: 'Type Here', created: onCreate })
        };
        pdfViewer.toolbarSettings = {
            showTooltip: true,
            toolbarItems: [toolItem1, toolItem2, 'OpenOption', 'PageNavigationTool', 'MagnificationTool', toolItem3, 'PanTool', 'SelectionTool', 'SearchOption', 'PrintOption', 'DownloadOption', 'UndoRedoTool', 'AnnotationEditTool', 'FormDesignerEditTool', toolItem4, 'CommentTool', 'SubmitForm']
        };
        function onCreate() {
            this.addIcon('prepend', 'e-icons e-search');
        }
    }

    // Define the toolbarClick event handler
    function toolbarClick(args) {
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];

        if (args.item && args.item.id === 'print') {
            pdfViewer.printModule.print();
        } else if (args.item && args.item.id === 'download') {
            pdfViewer.download();
        }
    }

</script>
<div>
    <ejs-pdfviewer id="pdfviewer"
                   style="width:1350px;height:100%"
                   documentPath="https://cdn.syncfusion.com/content/pdf/pdf-succinctly.pdf"
                   serviceUrl="/api/PdfViewer"
                   toolbarClick="toolbarClick">
    </ejs-pdfviewer>
</div>

<script type="text/javascript">
    window.onload = function () {
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
        var toolItem1 = {
            prefixIcon: 'e-icons e-paste',
            id: 'print',
            tooltipText: 'Custom toolbar item',
            align: 'left'
        };
        var toolItem2 = {
            id: 'download',
            text: 'Save',
            tooltipText: 'Custom toolbar item',
            align: 'right'
        };
        var LanguageList = ['Typescript', 'Javascript', 'Angular', 'C#', 'C', 'Python'];
        var toolItem3 = {
            type: 'Input',
            tooltipText: 'Language List',
            cssClass: 'percentage',
            align: 'Left',
            id: 'dropdown',
            template: new ej.dropdowns.ComboBox({ width: 100, value: 'TypeScript', dataSource: LanguageList, popupWidth: 85, showClearButton: false, readonly: false })
        };
        var toolItem4 = {
            type: 'Input',
            tooltipText: 'Text',
            align: 'Right',
            cssClass: 'find',
            id: 'textbox',
            template: new ej.inputs.TextBox({ width: 125, placeholder: 'Type Here', created: onCreate })
        };
        pdfViewer.toolbarSettings = {
            showTooltip: true,
            toolbarItems: [toolItem1, toolItem2, 'OpenOption', 'PageNavigationTool', 'MagnificationTool', toolItem3, 'PanTool', 'SelectionTool', 'SearchOption', 'PrintOption', 'DownloadOption', 'UndoRedoTool', 'AnnotationEditTool', 'FormDesignerEditTool', toolItem4, 'CommentTool', 'SubmitForm']
        };
        function onCreate() {
            this.addIcon('prepend', 'e-icons e-search');
        }
    }

    // Define the toolbarClick event handler
    function toolbarClick(args) {
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];

        if (args.item && args.item.id === 'print') {
            pdfViewer.printModule.print();
        } else if (args.item && args.item.id === 'download') {
            pdfViewer.download();
        }
    }

</script>

NOTE

Default value of toolbar items is [‘OpenOption’, ‘PageNavigationTool’,’MagnificationTool’, ‘PanTool’, ‘SelectionTool’, ‘SearchOption’, ‘PrintOption’, ‘DownloadOption’,’UndoRedoTool’, ‘AnnotationEditTool’, ‘FormDesignerEditTool’, ‘CommentTool’, ‘SubmitForm’]

Align Property

The align property is used to specify the alignment of a toolbar item within the toolbar.

Left: Aligns the item to the left side of the toolbar.
Right: Aligns the item to the right side of the toolbar.

The tooltip property is used to set the tooltip text for a toolbar item. Tooltip provides additional information when a user hovers over the item.

CssClass Property

The cssClass property is used to apply custom CSS classes to a toolbar item. It allows custom styling of the toolbar item.

Prefix Property

The prefix property is used to set the CSS class or icon that should be added as a prefix to the existing content of the toolbar item.

ID Property

The id property within a CustomToolbarItemModel is a compulsory attribute that plays a vital role in toolbar customization. It serves as a unique identifier for each toolbar item, facilitating distinct references and interactions.

When defining or customizing toolbar items, it is mandatory to assign a specific and descriptive id to each item.
These properties are commonly used when defining custom toolbar items with the CustomToolbarItemModel in the context of Syncfusion PDF Viewer. When configuring the toolbar using the ToolbarSettings`` property, you can include these properties to customize the appearance and behavior of each toolbar item.

NOTE

When customizing toolbar items, you have the flexibility to include either icons or text based on your design preference.

View sample in GitHub

The PDF Viewer provides API for user interactions options provided in its built-in toolbar. Using this, you can create your own User Interface for toolbar actions in application level by hiding the built-in toolbar. The following steps are used to create the custom toolbar for PDF Viewer:-

Step 1: Follow the steps provided in the link to create simple PDF Viewer sample.

Step 2: Add EJ2 toolbar for performing primary actions like Open,Previous page,Next page,Go to page,Print and Download using the following code snippet.,

@{
    var template = "<div class=''><span class='e-pv-total-page-number' id='totalPage'>of 0</span></div>";
    var inputtemplate = "<div class=''><input type='text' class='e-input-group e-pv-current-page-number' id='currentPage' /></div>";
}

<ejs-toolbar id="topToolbar" height="56px">
    <e-toolbar-items>
        <e-toolbar-item prefixIcon="e-pv-open-document-icon" tooltipText="Open" align="Left" click="openPage" id="Openpage"></e-toolbar-item>
        <e-toolbar-item prefixIcon="e-pv-previous-page-navigation-icon" tooltipText="Previous Page" align="Center" click="previousClicked" id="previousPage"></e-toolbar-item>
        <e-toolbar-item prefixIcon="e-pv-next-page-navigation-icon" tooltipText="Next Page" align="Center" click="nextClicked" id="nextPage"></e-toolbar-item>
        <e-toolbar-item template="@inputtemplate" tooltipText="Page Number" type="Input" align="Center"></e-toolbar-item>
        <e-toolbar-item template="@template" align="Center" tooltipText="Page Number"></e-toolbar-item>
        <e-toolbar-item prefixIcon="e-pv-print-document-icon" tooltipText="Print" align="Right" click="printClicked"></e-toolbar-item>
        <e-toolbar-item prefixIcon="e-pv-download-document-icon" tooltipText="Download" align="Right" click="downloadClicked"></e-toolbar-item>
    </e-toolbar-items>
</ejs-toolbar>
<ejs-pdfviewer id="pdfviewer" style="height:641px" enableToolbar="false" enableNavigationToolbar="false" documentLoad="documentLoaded" pageChange="pageChanged"></ejs-pdfviewer>
<input type="file" id="fileUpload" accept=".pdf" style="display:block;visibility:hidden;width:0;height:0;">

Step 3: Add EJ2 toolbar for performing magnification actions in PDF Viewer using the following code snippet.,

<div id="magnificationToolbarItems">
    <ejs-toolbar id="magnificationToolbar">
        <e-toolbar-items id="magnificationToolbarItems">
            <e-toolbar-item prefixIcon="e-pv-fit-page" tooltipText="Fit to page" click="pageFitClicked"></e-toolbar-item>
            <e-toolbar-item prefixIcon="e-pv-zoom-in-icon" tooltipText="Zoom in" click="zoomInClicked"></e-toolbar-item>
            <e-toolbar-item prefixIcon="e-pv-zoom-out-icon" tooltipText="Zoom out" click="zoomOutClicked"></e-toolbar-item>
        </e-toolbar-items>
    </ejs-toolbar>
</div>

Step 4: Add the following style to achieve the custom toolbar styling.,

<style>
    #magnificationToolbar {
        background: transparent;
        height: auto;
        width: 200px;
        position: absolute;
        z-index: 1001;
        left: calc(100% - 120px);
        top: calc(100% - 110px);
        transform: rotate(90deg);
        border-width: 0px;
    }

    .e-pv-zoom-out-icon {
        transform: rotate(-90deg);
    }

    div#magnificationToolbar.e-toolbar .e-toolbar-items {
        background: transparent;
    }

    #magnificationToolbar.e-toolbar .e-tbar-btn {
        border-radius: 50%;
        min-height: 30px;
        min-width: 30px;
    }

    #topToolbar {
        top: 0px;
        z-index: 1001;
    }

    .material .e-pv-current-page-number {
        border-width: 1px;
    }

    .e-pv-current-page-number {
        width: 46px;
        height: 28px;
        text-align: center;
    }

    .e-icons {
        font-family: "e-icons";
        font-style: normal;
        font-variant: normal;
        font-weight: normal;
        line-height: 1;
        text-transform: none;
    }

    .e-pv-icon::before {
        font-family: 'e-icons';
    }

    .e-pv-icon-search::before {
        font-family: 'e-icons';
        font-size: 12px;
    }

    #topToolbar .e-pv-download-document-icon::before {
        padding-left: 4px;
        content: '\e914';
    }

    #topToolbar .e-pv-print-document-icon::before {
        padding-left: 1px;
        content: '\e917';
    }

    .e-pv-previous-page-navigation-icon::before {
        content: '\e910';
    }

    .e-pv-next-page-navigation-icon::before {
        content: '\e911';
    }

    .e-pv-zoom-out-icon::before {
        content: '\e912';
    }

    .e-pv-zoom-in-icon::before {
        content: '\e91d';
    }

    .e-pv-fit-page::before {
        content: '\e91b';
    }

    .e-pv-open-document-icon::before {
        content: '\e91c';
    }

    @font-face {
        font-family: "e-icons";
        font-style: normal;
        font-weight: normal;
        src: url(data:application/x-font-ttf;charset=utf-8;base64,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) format('truetype');
    }
</style>

NOTE

The icons are embedded in the font file used in the previous code snippet.

Step 5: Add the following scripts for performing user interaction in PDF Viewer in code behind.

Standalone
Server-Backed
<script type="text/javascript">
    var currentPageBox
    var matchCase = false;
    var filename;
    window.onload = function () {
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
        pdfViewer.load("https://cdn.syncfusion.com/content/pdf/hive-succinctly.pdf", null);
        currentPageBox = document.getElementById('currentPage');
        currentPageBox.value = '1';
        document.getElementById('fileUpload').addEventListener('change', readFile, false);
        currentPageBox.addEventListener('keypress', () => {
            var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
            var currentPage = document.getElementById('currentPage');
            if ((event.which < 48 || event.which > 57) && event.which !== 8 && event.which !== 13) {
                event.preventDefault();
                return false;
            } else {
                var currentPageNumber = parseInt((currentPage).value);
                if (event.which === 13) {
                    if (currentPageNumber > 0 && currentPageNumber <= pdfViewer.pageCount) {
                        pdfViewer.navigation.goToPage(currentPageNumber);
                    } else {
                        (currentPage).value = pdfViewer.currentPageNumber.toString();
                    }
                }
                return true;
            }
        });
    }
    function openPage() {
        document.getElementById('fileUpload').click();
    }
    function readFile(evt) {
        var upoadedFiles = evt.target.files;
        var uploadedFile = upoadedFiles[0];
        filename = upoadedFiles[0].name;
        var reader = new FileReader();
        reader.readAsDataURL(uploadedFile);
        reader.onload = function () {
            var obj = document.getElementById('pdfviewer').ej2_instances[0];
            var uploadedFileUrl = this.result;
            obj.load(uploadedFileUrl, null);
            obj.fileName = filename;
            currentPageBox = document.getElementById('currentPage');
            currentPageBox.value = '1';
            var pageCount = document.getElementById('totalPage');
            pageCount.textContent = 'of ' + obj.pageCount;
        }
    }
    function pageChanged() {
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
        document.getElementById('currentPage').value = pdfViewer.currentPageNumber;
        updatePageNavigation();
    }
    function onCurrentPageBoxKeypress(event) {
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
        var currentPageBox = document.getElementById('currentPage');
        if ((event.which < 48 || event.which > 57) && event.which !== 8 && event.which !== 13) {
            event.preventDefault();
            return false;
        }
        else {
            var currentPageNumber = parseInt(currentPageBox.value);
            if (event.which === 13) {
                if (currentPageNumber > 0 && currentPageNumber <= viewer.pageCount) {
                    pdfViewer.navigation.goToPage(currentPageNumber);
                }
                else {
                    currentPageBox.value = viewer.currentPageNumber.toString();
                }
            }
            return true;
        }
    }

    function currentPageClicked() {
        var currentPage = document.getElementById('currentPage');
        (currentPage).select();
    }
    function documentLoaded() {
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
        var pageCount = document.getElementById('totalPage');
        pageCount.textContent = 'of ' + pdfViewer.pageCount;
        updatePageNavigation();
    }
    function updatePageNavigation() {
        var toolbarObj = document.getElementById('topToolbar').ej2_instances[0];
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
        if (pdfViewer.currentPageNumber === 1) {
            toolbarObj.enableItems(document.getElementById('previousPage'), false);
            toolbarObj.enableItems(document.getElementById('nextPage'), true);
        } else if (pdfViewer.currentPageNumber === pdfViewer.pageCount) {
            toolbarObj.enableItems(document.getElementById('previousPage'), true);
            toolbarObj.enableItems(document.getElementById('nextPage'), false);
        } else {
            toolbarObj.enableItems(document.getElementById('previousPage'), true);
            toolbarObj.enableItems(document.getElementById('nextPage'), true);
        }
    }
    function previousClicked() {
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
        pdfViewer.navigation.goToPreviousPage();
    }
    function nextClicked() {
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
        pdfViewer.navigation.goToNextPage();
    }
    function printClicked() {
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
        pdfViewer.print.print();
    }
    function downloadClicked() {
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
        pdfViewer.download();
    }
    function pageFitClicked() {
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
        pdfViewer.magnification.fitToPage();
    }
    function zoomInClicked() {
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
        pdfViewer.magnification.zoomIn();
    }
    function zoomOutClicked() {
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
        pdfViewer.magnification.zoomOut();
    }
</script>
<script type="text/javascript">
    var currentPageBox
    var matchCase = false;
    var filename;
    window.onload = function () {
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
        pdfViewer.serviceUrl = window.baseurl + 'api/PdfViewer';
        pdfViewer.load("https://cdn.syncfusion.com/content/pdf/hive-succinctly.pdf", null);
        currentPageBox = document.getElementById('currentPage');
        currentPageBox.value = '1';
        document.getElementById('fileUpload').addEventListener('change', readFile, false);
        currentPageBox.addEventListener('keypress', () => {
            var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
            var currentPage = document.getElementById('currentPage');
            if ((event.which < 48 || event.which > 57) && event.which !== 8 && event.which !== 13) {
                event.preventDefault();
                return false;
            } else {
                var currentPageNumber = parseInt((currentPage).value);
                if (event.which === 13) {
                    if (currentPageNumber > 0 && currentPageNumber <= pdfViewer.pageCount) {
                        pdfViewer.navigation.goToPage(currentPageNumber);
                    } else {
                        (currentPage).value = pdfViewer.currentPageNumber.toString();
                    }
                }
                return true;
            }
        });
    }
    function openPage() {
        document.getElementById('fileUpload').click();
    }
    function readFile(evt) {
        var upoadedFiles = evt.target.files;
        var uploadedFile = upoadedFiles[0];
        filename = upoadedFiles[0].name;
        var reader = new FileReader();
        reader.readAsDataURL(uploadedFile);
        reader.onload = function () {
            var obj = document.getElementById('pdfviewer').ej2_instances[0];
            var uploadedFileUrl = this.result;
            obj.load(uploadedFileUrl, null);
            obj.fileName = filename;
            currentPageBox = document.getElementById('currentPage');
            currentPageBox.value = '1';
            var pageCount = document.getElementById('totalPage');
            pageCount.textContent = 'of ' + obj.pageCount;
        }
    }
    function pageChanged() {
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
        document.getElementById('currentPage').value = pdfViewer.currentPageNumber;
        updatePageNavigation();
    }
    function onCurrentPageBoxKeypress(event) {
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
        var currentPageBox = document.getElementById('currentPage');
        if ((event.which < 48 || event.which > 57) && event.which !== 8 && event.which !== 13) {
            event.preventDefault();
            return false;
        }
        else {
            var currentPageNumber = parseInt(currentPageBox.value);
            if (event.which === 13) {
                if (currentPageNumber > 0 && currentPageNumber <= viewer.pageCount) {
                    pdfViewer.navigation.goToPage(currentPageNumber);
                }
                else {
                    currentPageBox.value = viewer.currentPageNumber.toString();
                }
            }
            return true;
        }
    }

    function currentPageClicked() {
        var currentPage = document.getElementById('currentPage');
        (currentPage).select();
    }
    function documentLoaded() {
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
        var pageCount = document.getElementById('totalPage');
        pageCount.textContent = 'of ' + pdfViewer.pageCount;
        updatePageNavigation();
    }
    function updatePageNavigation() {
        var toolbarObj = document.getElementById('topToolbar').ej2_instances[0];
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
        if (pdfViewer.currentPageNumber === 1) {
            toolbarObj.enableItems(document.getElementById('previousPage'), false);
            toolbarObj.enableItems(document.getElementById('nextPage'), true);
        } else if (pdfViewer.currentPageNumber === pdfViewer.pageCount) {
            toolbarObj.enableItems(document.getElementById('previousPage'), true);
            toolbarObj.enableItems(document.getElementById('nextPage'), false);
        } else {
            toolbarObj.enableItems(document.getElementById('previousPage'), true);
            toolbarObj.enableItems(document.getElementById('nextPage'), true);
        }
    }
    function previousClicked() {
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
        pdfViewer.navigation.goToPreviousPage();
    }
    function nextClicked() {
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
        pdfViewer.navigation.goToNextPage();
    }
    function printClicked() {
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
        pdfViewer.print.print();
    }
    function downloadClicked() {
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
        pdfViewer.download();
    }
    function pageFitClicked() {
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
        pdfViewer.magnification.fitToPage();
    }
    function zoomInClicked() {
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
        pdfViewer.magnification.zoomIn();
    }
    function zoomOutClicked() {
        var pdfViewer = document.getElementById('pdfviewer').ej2_instances[0];
        pdfViewer.magnification.zoomOut();
    }
</script>

Sample:
https://ej2.syncfusion.com/aspnetcore/PdfViewer/CustomToolbar#/material

Show/Hide the built-in toolbaritem

Align Property

Tooltip Property

CssClass Property

Prefix Property

ID Property

See also

Built-in toolbar in ASP.NET Core PDF Viewer control

Show/Hide the built-in toolbar

Show/Hide the built-in toolbaritem

Customize Built-In Toolbar

Align Property

Tooltip Property

CssClass Property

Prefix Property

ID Property

Custom Toolbar

See also