Stamp annotation in ASP.NET Core PDF Viewer component

27 Apr 202619 minutes to read

The PDF Viewer provides options to add, edit, delete, and rotate the following stamp annotations:

Dynamic
Sign Here
Standard Business
Custom Stamp

StampAnnotation

Add stamp annotations to the PDF document

Stamp annotations are added using the annotation toolbar in the ASP.NET Core PDF Viewer.

Use the Edit Annotation button in the PDF Viewer toolbar to open the annotation toolbar.
Use the Stamp Annotation drop-down to view available stamp annotation types.
Selecting a stamp type enables its annotation mode.
Place the stamp on a page in the PDF document.

NOTE

When the viewer is in pan mode and a stamp annotation tool is selected, the PDF Viewer automatically switches to text select mode to provide a smoother interaction.

The following examples show how to switch to stamp annotation modes in ASP.NET Core.

Standalone
Server-Backed
<div>
    <button type="button" onclick="dynamicStamp()">Dynamic Stamp</button>
    <button type="button" onclick="signStamp()">Sign Stamp</button>
    <button type="button" onclick="standardBusinessStamp()">StandardBusiness Stamp</button>
    
    <div class="control-section" style="height:640px">
        <ejs-pdfviewer id="container"
                       documentPath="https://cdn.syncfusion.com/content/pdf/pdf-succinctly.pdf"
                       resourceUrl="https://cdn.syncfusion.com/ej2/31.2.2/dist/ej2-pdfviewer-lib"
                       style="height:640px">
        </ejs-pdfviewer>
    </div>
</div>

<script>
function dynamicStamp() {
    var viewer = document.getElementById('container').ej2_instances[0];
    viewer.annotation.setAnnotationMode('Stamp', 'NotApproved');
}

function signStamp() {
    var viewer = document.getElementById('container').ej2_instances[0];
    viewer.annotation.setAnnotationMode('Stamp', null, 'Witness');
}

function standardBusinessStamp() {
    var viewer = document.getElementById('container').ej2_instances[0];
    viewer.annotation.setAnnotationMode('Stamp', null, null, 'Approved');
}
</script>
<div>
    <button type="button" onclick="dynamicStamp()">Dynamic Stamp</button>
    <button type="button" onclick="signStamp()">Sign Stamp</button>
    <button type="button" onclick="standardBusinessStamp()">StandardBusiness Stamp</button>
    
    <div class="control-section" style="height:640px">
        <ejs-pdfviewer id="container"
                       documentPath="https://cdn.syncfusion.com/content/pdf/pdf-succinctly.pdf"
                       serviceUrl="/api/PdfViewer"
                       style="height:640px">
        </ejs-pdfviewer>
    </div>
</div>

<script>
function dynamicStamp() {
    var viewer = document.getElementById('container').ej2_instances[0];
    viewer.annotation.setAnnotationMode('Stamp', 'NotApproved');
}

function signStamp() {
    var viewer = document.getElementById('container').ej2_instances[0];
    viewer.annotation.setAnnotationMode('Stamp', null, 'Witness');
}

function standardBusinessStamp() {
    var viewer = document.getElementById('container').ej2_instances[0];
    viewer.annotation.setAnnotationMode('Stamp', null, null, 'Approved');
}
</script>

Add a custom stamp

Use the Edit Annotation button and the Stamp Annotation drop-down to access the Custom Stamp option.

CustomStamp

Select the Custom Stamp option, then choose an image file to add as a custom stamp on the PDF page.

Only JPG and JPEG image formats are supported for custom stamp annotations.

Add a stamp annotation programmatically

Use the addAnnotation() method to add stamp annotations programmatically.

The examples below demonstrate using addAnnotation() to create stamp annotations.

Standalone
Server-Backed
<div>
    <button onclick="dynamicStamp()">Dynamic Stamp</button>
    <button onclick="signStamp()">Sign Stamp</button>
    <button onclick="standardBusinessStamp()">StandardBusiness Stamp</button>
    <button onclick="addCustomStamp()">Add Custom Stamp Programmatically</button>

    <div class="control-section" style="height:640px">
        <ejs-pdfviewer id="container"
                       documentPath="https://cdn.syncfusion.com/content/pdf/pdf-succinctly.pdf"
                       resourceUrl="https://cdn.syncfusion.com/ej2/31.2.2/dist/ej2-pdfviewer-lib"
                       style="height:640px">
        </ejs-pdfviewer>
    </div>
</div>

<script>
function getViewer() {
    return document.getElementById('container').ej2_instances[0];
}

function dynamicStamp() {
    var viewer = getViewer();
    viewer.annotation.addAnnotation(
        "Stamp",
        {
            offset: { x: 200, y: 140 },
            pageNumber: 1
        },
        'Approved'
    );
}

function signStamp() {
    var viewer = getViewer();
    viewer.annotation.addAnnotation(
        "Stamp",
        {
            offset: { x: 200, y: 240 },
            pageNumber: 1
        },
        undefined,
        'Witness'
    );
}

function standardBusinessStamp() {
    var viewer = getViewer();
    viewer.annotation.addAnnotation(
        "Stamp",
        {
            offset: { x: 200, y: 340 },
            pageNumber: 1
        },
        undefined,
        undefined,
        'Approved'
    );
}

function addCustomStamp() {
    var viewer = getViewer();
    viewer.annotation.addAnnotation(
        "Stamp",
        {
            offset: { x: 100, y: 440 },
            width: 46,
            height: 100,
            author: "Guest",
            isLock: true,
            pageNumber: 1,
            customStamps: [
        {
          customStampName: "Image",
          customStampImageSource:
            "data:image/jpeg;base64,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"
             }
          ]
        }
    );
}
</script>
<div>
    <button onclick="dynamicStamp()">Dynamic Stamp</button>
    <button onclick="signStamp()">Sign Stamp</button>
    <button onclick="standardBusinessStamp()">StandardBusiness Stamp</button>
    <button onclick="addCustomStamp()">Add Custom Stamp Programmatically</button>

    <div class="control-section" style="height:640px">
        <ejs-pdfviewer id="container"
                       documentPath="https://cdn.syncfusion.com/content/pdf/pdf-succinctly.pdf"
                       serviceUrl="/api/PdfViewer"
                       style="height:640px">
        </ejs-pdfviewer>
    </div>
</div>

<script>
function getViewer() {
    return document.getElementById('container').ej2_instances[0];
}

function dynamicStamp() {
    var viewer = getViewer();
    viewer.annotation.addAnnotation(
        "Stamp",
        {
            offset: { x: 200, y: 140 },
            pageNumber: 1
        },
        'Approved'
    );
}

function signStamp() {
    var viewer = getViewer();
    viewer.annotation.addAnnotation(
        "Stamp",
        {
            offset: { x: 200, y: 240 },
            pageNumber: 1
        },
        undefined,
        'Witness'
    );
}

function standardBusinessStamp() {
    var viewer = getViewer();
    viewer.annotation.addAnnotation(
        "Stamp",
        {
            offset: { x: 200, y: 340 },
            pageNumber: 1
        },
        undefined,
        undefined,
        'Approved'
    );
}

function addCustomStamp() {
    var viewer = getViewer();
    viewer.annotation.addAnnotation(
        "Stamp",
        {
            offset: { x: 100, y: 440 },
            width: 46,
            height: 100,
            author: "Guest",
            isLock: true,
            pageNumber: 1,
            customStamps: [
        {
          customStampName: "Image",
          customStampImageSource:
            "data:image/jpeg;base64,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"
             }
          ]
        }
    );
}
</script>

Edit an existing stamp annotation programmatically

Use the editAnnotation() method to modify existing stamp annotations programmatically in ASP.NET Core.

The following example demonstrates editAnnotation().

Standalone
Server-Backed
<div>
    <button type="button" onclick="editAnnotation()">Edit Annotation programatically</button>
    
    <div class="control-section" style="height:640px">
        <ejs-pdfviewer id="container"
                       documentPath="https://cdn.syncfusion.com/content/pdf/pdf-succinctly.pdf"
                       resourceUrl="https://cdn.syncfusion.com/ej2/31.2.2/dist/ej2-pdfviewer-lib"
                       style="height:640px">
        </ejs-pdfviewer>
    </div>
</div>

<script>
function editAnnotation() {
    var viewer = document.getElementById('container').ej2_instances[0];
    for (var i = 0; i < viewer.annotationCollection.length; i++) {
        if (viewer.annotationCollection[i].shapeAnnotationType === "stamp") {
            var width = viewer.annotationCollection[i].bounds.width;
            var height = viewer.annotationCollection[i].bounds.height;
            viewer.annotationCollection[i].bounds = { x: 100, y: 100, width: width, height: height };
            viewer.annotationCollection[i].annotationSettings.isLock = true;
            viewer.annotation.editAnnotation(viewer.annotationCollection[i]);
        }
    }
}
</script>
<div>
    <button type="button" onclick="editAnnotation()">Edit Annotation programatically</button>
    
    <div class="control-section" style="height:640px">
        <ejs-pdfviewer id="container"
                       documentPath="https://cdn.syncfusion.com/content/pdf/pdf-succinctly.pdf"
                       serviceUrl="/api/PdfViewer"
                       style="height:640px">
        </ejs-pdfviewer>
    </div>
</div>

<script>
function editAnnotation() {
    var viewer = document.getElementById('container').ej2_instances[0];
    for (var i = 0; i < viewer.annotationCollection.length; i++) {
        if (viewer.annotationCollection[i].shapeAnnotationType === "stamp") {
            var width = viewer.annotationCollection[i].bounds.width;
            var height = viewer.annotationCollection[i].bounds.height;
            viewer.annotationCollection[i].bounds = { x: 100, y: 100, width: width, height: height };
            viewer.annotationCollection[i].annotationSettings.isLock = true;
            viewer.annotation.editAnnotation(viewer.annotationCollection[i]);
        }
    }
}
</script>

Set default properties during control initialization

Set default properties for stamp annotations before creating the control by specifying stampSettings.

After changing the default opacity using the Edit Opacity tool, the selected value is applied. The example below shows how to set default stamp annotation settings.

Standalone
Server-Backed
<div style="width:100%;height:680px">
    <ejs-pdfviewer id="container" 
                   style="height:600px" 
                   resourceUrl="https://cdn.syncfusion.com/ej2/31.2.2/dist/ej2-pdfviewer-lib" 
                   documentPath="https://cdn.syncfusion.com/content/pdf/pdf-succinctly.pdf">
    </ejs-pdfviewer>
</div>

<script>
window.onload = function() {
    var viewer = document.getElementById('container').ej2_instances[0];
    if (viewer) {
        viewer.stampSettings = {
            opacity: 0.3,
            author: 'Guest User'
        };
    }
};
</script>
<div style="width:100%;height:680px">
    <ejs-pdfviewer id="container" 
                   style="height:600px" 
                   serviceUrl="/api/PdfViewer"
                   documentPath="https://cdn.syncfusion.com/content/pdf/pdf-succinctly.pdf">
    </ejs-pdfviewer>
</div>

<script>
window.onload = function() {
    var viewer = document.getElementById('container').ej2_instances[0];
    if (viewer) {
        viewer.stampSettings = {
            opacity: 0.3,
            author: 'Guest User'
        };
    }
};
</script>

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