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ASP.NET Core Signature Signing PDF Documents

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EXAMPLE

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- Telerik REPL

Also available for:

ASP.NET MVC

Add a Signature to your existing PDF files.

Add your Signature and Export the PDF File

$(document).ready(function () { var signature = $("#signature").getKendoSignature(); $("#toolbar").kendoToolBar({ items: [ { template: "<label>Brush:</label><input id='colorpicker'/>", id: "brush", overflow: "never" }, { type: "splitButton", text: "Size", id: "sizes", overflow: "never", menuButtons: [ { text: "Normal" }, { text: "Wide" } ], click: function (e) { signature.setOptions({ strokeWidth: e.target.text() === "Wide" ? 3 : 1 }); } }, { template: "<label>Background:</label><input id='background'/>", id: "bccolor", overflow: "never" } ] }); $("#bottomtoolbar").kendoToolBar({ items: [ { type: "button", text: "Place Your Signature", primary: true, icon: "save", click: exportToPdf } ] }); $("#colorpicker").kendoColorPicker({ view: "gradient", views: ["gradient", "palette"], value: "#4040b7", change: function (e) { signature.setOptions({ color: e.value }); }, buttons: false }); $("#background").kendoColorPicker({ view: "gradient", value: "#FFFFFF", views: ["gradient", "palette"], change: function (e) { signature.setOptions({ backgroundColor: e.value }); }, buttons: false }); }); function exportToPdf(e) { kendo.drawing.drawDOM(".k-signature-canvas > canvas") .then(function (group) { // Render the result as a pdf document return kendo.drawing.exportPDF(group); }) .done(function (data) { // Save the pdf document refreshPdfViewer(data); }); } function refreshPdfViewer(data) { $.post('/aspnet-core/signature/preparepdf', { pdfdata: data.replace("data:application/pdf;base64,", "") }, function (response) { var pdfViewer = $("#pdfViewer").data().kendoPDFViewer; pdfViewer.destroy(); pdfViewer.element.empty(); var newPdfViewer = pdfViewer.element.kendoPDFViewer({ height: 680, scale: 0.7, pdfjsProcessing: { file: { data: response } }, }).data().kendoPDFViewer; }); } .signature-container { width: 360px; margin: auto; } .signature-container > p { font-size: larger; font-weight: bold; color: #494949; } .signature-wrapper { height: 150px; } .signature-wrapper .k-signature { width: 100%; height: 100%; } div.notes { font-style: italic; border-width: 1px; border-bottom-width: 0; border-style: solid; padding: 1em; } .k-signature, .notes { border-color: rgba(0, 0, 0, 0.08); border-width: 0 1px; border-radius: 0; }

Description

This demo about the Telerik UI for ASP.NET Core Signature component demonstrates how to save the Signature within a PDF file.

It makes use of the capabilities provided by the Telerik Document Processing Libraries to extract the PDF file within a memory file and then re-apply the Signature bytes to create a new PDF document.

The initial PDF file is conveniently displayed to the user with another component called Telerik UI for ASP.NET Core PDFViewer. This component also provides a built-in Download Button which can be used to Save the new PDF document with the new Signature applied.

Additional Apps

This Signature example is part of unique collection of hundreds of ASP.NET Core demos, with which you can see all Telerik ASP.NET Core components and their features in action. View the source code of the demos from the library or directly adapt, and edit them and their theme appearance in Telerik REPL for ASP.NET Core or ThemeBuilder.

ASP.NET Core Signature Signing PDF Documents

Description

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