tomevault-io name: gembox-skill description: Coding assistance for GemBox components. Use when users ask about any GemBox component or coding task that can be performed with a GemBox component. This includes GemBox.Spreadsheet (.NET read/write Excel files), GemBox.Document (.NET read/write Word files), GemBox.Pdf (.NET read/write PDF files), GemBox.Presentation (.NET read/write PowerPoint files), GemBox.Email (.NET read/write email files, send/receive emails), GemBox.Imaging (.NET read/write image files), and GemBox.PdfViewer (JavaScript display/print/save PDF files). license: MIT metadata: author: gemboxsoftware.com version: "0.9"
CLI tips
- .NET runtime check:
dotnet --list-runtimes - GemBox .NET component version:
dotnet list package - If you need GemBox API details, look them up locally in the XML docs. Example GemBox.Spreadsheet NuGet paths:
- Linux/macOS:
~/.nuget/packages/gembox.spreadsheet/2025.12.105/lib/*/GemBox.Spreadsheet.xml - PowerShell:
$env:USERPROFILE\.nuget\packages\gembox.spreadsheet\2025.12.105\lib\*\GemBox.Spreadsheet.xml
- Linux/macOS:
- Use ripgrep to search the XML. E.g.:
- Linux/macOS:
rg -n "Autofit" ~/.nuget/packages/gembox.spreadsheet/2025.12.105/lib/**/GemBox.Spreadsheet.xml
- Linux/macOS:
- If the API is unclear, scan namespaces and remarks/examples in the doc XML before coding. E.g.:
- Linux/macOS:
rg -n "namespace GemBox|Drawing|PivotTables" ~/.nuget/packages/gembox.spreadsheet/2025.12.105/lib/**/GemBox.Spreadsheet.xml
- Linux/macOS:
Online search
If you don't find relevant docs via CLI, and you have network access, search online:
- Open a relevant official example page, as examples listed below provide the most information. E.g, if you need custom fonts in GemBox.Document, the base URL is "https://www.gemboxsoftware.com/document/examples/". The specific example that mentions fonts is "fonts/103", so open "https://www.gemboxsoftware.com/document/examples/fonts/103" page.
- If examples are insufficient, search the official API documentation of a specific component. E.g. GemBox.Spreadsheet online search filter: "site:https://www.gemboxsoftware.com/spreadsheet/docs"
Validation
Once you are finished, validate the code by compiling the project. If there are errors related to GemBox API usage, modify the code accordingly. Ignore compilation errors that are not related to GemBox or not caused by your edits.
GemBox.Spreadsheet examples URLs
BASE: https://www.gemboxsoftware.com/spreadsheet/examples/ SPREADSHEET EXAMPLES: asp-net-core-create-excel/5601 asp-net-excel-export-gridview/5101 asp-net-excel-viewer/6012 blazor-create-excel/5602 c-sharp-convert-excel-to-image/405 c-sharp-convert-excel-to-pdf/404 c-sharp-create-write-excel-file/402 c-sharp-excel-range/204 c-sharp-export-datatable-dataset-to-excel/501 c-sharp-export-excel-to-datatable/502 c-sharp-microsoft-office-interop-excel-automation/6004 c-sharp-open-read-excel-file/401 c-sharp-read-write-csv/122 c-sharp-vb-net-convert-excel-html/117 c-sharp-vb-net-create-excel-chart-sheet/302 c-sharp-vb-net-create-excel-tables/119 c-sharp-vb-net-excel-chart-formatting/306 c-sharp-vb-net-excel-conditional-formatting/105 c-sharp-vb-net-excel-form-controls/123 c-sharp-vb-net-excel-row-column-autofit/108 c-sharp-vb-net-excel-style-formatting/202 c-sharp-vb-net-import-export-excel-datagridview/5301 c-sharp-vb-net-print-excel/451 c-sharp-vb-net-xls-decryption/707 convert-excel-table-range-vb-net-c-sharp/6011 convert-import-write-json-to-excel-vb-net-c-sharp/6010 convert-xls-xlsx-ods-csv-html-net-c-sharp/6001 create-excel-charts/301 create-excel-file-maui/5802 create-excel-file-xamarin/5801 create-excel-files-c-sharp/6013 create-excel-pdf-on-azure/5901 create-excel-pdf-on-docker-net-core/5902 create-excel-pdf-on-linux-net-core/5701 create-excel-pivot-tables/114 create-read-write-excel-classic-asp/5501 create-read-write-excel-php/5502 create-read-write-excel-python/5503 edit-save-excel-template/403 excel-autofilter/112 excel-calculations-c-sharp-vb-net/6022 excel-cell-comments/208 excel-cell-data-types/201 excel-cell-hyperlinks/207 excel-cell-inline-formatting/203 excel-cell-number-format/205 excel-chart-components/304 excel-charts-guide-c-sharp/6019 excel-data-validation/106 excel-defined-names/214 excel-encryption/701 excel-find-replace-text/109 excel-formulas/206 excel-freeze-split-panes/102 excel-grouping/101 excel-header-footer-formatting/6021 excel-headers-footers/210 excel-images/209 excel-performance-metrics/5401 excel-preservation/801 excel-print-title-area/104 excel-print-view-options/103 excel-properties/107 excel-shapes/211 excel-sheet-copy-delete/111 excel-sheet-protection/704 excel-textboxes/212 excel-workbook-protection/705 excel-wpf/5201 excel-xlsx-digital-signature/706 fixed-columns-width-text/118 fonts/115 free-trial-professional/1001 getting-started/601 merge-excel-cells-c-sharp-vb-net/213 open-read-excel-files-c-sharp/6009 pdf-digital-signature/703 pdf-encryption/702 progress-reporting-and-cancellation/121 protecting-excel-data-c-sharp/6020 right-to-left-text/120 sort-data-excel/113 unit-conversion-excel/116 vba-macros/124 xlsx-write-protection/708
GemBox.Document examples
BASE: https://www.gemboxsoftware.com/document/examples/ DOCUMENT EXAMPLES: asp-net-core-create-word-docx-pdf/5601 asp-net-create-generate-export-pdf-word/5101 auto-hyphenation/109 blazor-create-word/5602 c-sharp-convert-aspx-to-pdf/6002 c-sharp-convert-html-to-pdf/307 c-sharp-convert-pdf-to-docx/308 c-sharp-convert-word-to-from-html/105 c-sharp-convert-word-to-image/306 c-sharp-convert-word-to-pdf/304 c-sharp-convert-word-to-pdf/6007 c-sharp-microsoft-office-interop-word-automation/6005 c-sharp-read-extract-pdf-tables/305 c-sharp-vb-net-create-generate-pdf/6004 c-sharp-vb-net-create-update-word-toc/207 c-sharp-vb-net-create-word-form/701 c-sharp-vb-net-create-write-word-file/302 c-sharp-vb-net-docx-encryption/1102 c-sharp-vb-net-edit-save-word-template/303 c-sharp-vb-net-find-replace-word/405 c-sharp-vb-net-mail-merge-word/901 c-sharp-vb-net-manipulate-content-word/403 c-sharp-vb-net-open-read-word-file/301 c-sharp-vb-net-pdf-digital-signature/1104 c-sharp-vb-net-pdf-encryption/1103 c-sharp-vb-net-print-word/351 c-sharp-vb-net-read-word-form/702 c-sharp-vb-net-update-word-form/703 c-sharp-vb-net-word-performance/5401 cloning/501 combine-word-file-c-sharp-vb-net/502 content-controls/106 create-read-write-word-pdf-classic-asp/5501 create-read-write-word-pdf-php/5502 create-read-write-word-pdf-python/5503 create-table-in-word-csharp/1201 create-word-file-maui/5802 create-word-file-xamarin/5801 create-word-pdf-on-azure-functions-app-service/5901 create-word-pdf-on-docker-net-core/5902 create-word-pdf-on-linux-net-core/5701 customize-mail-merge/904 docx-digital-signature/1106 docx-write-protection/1101 extract-individual-pages/112 find-replace-word-csharp/6003 fonts/103 free-trial-professional/1301 generate-barcodes-qr-codes-csharp-vb-net/217 getting-started/801 html-to-pdf-converter-csharp/6001 iterating/503 load-process-pdf-csharp/6006 mail-merge-clear-options/905 mail-merge-if-fields/902 mail-merge-labels/909 mail-merge-pictures/908 mail-merge-ranges/903 merge-barcodes-qr-codes/907 nested-mail-merge/906 progress-reporting-and-cancellation/108 restrict-editing/1105 right-to-left-text/107 unit-conversion/104 vba-macros/111 word-bookmarks-hyperlinks/204 word-breaks/205 word-character-formatting/601 word-charts/213 word-comments/215 word-editor-asp-net-mvc/5102 word-editor-windows-forms/5301 word-editor-wpf/5203 word-fields/206 word-footnote-endnote/212 word-header-footer/208 word-lists/603 word-merge-cells/1203 word-page-setup/209 word-paragraph-formatting/602 word-pictures/201 word-preservation/1001 word-properties/211 word-shapes/203 word-styles/604 word-table-formatting/1204 word-table-styles/1205 word-textboxes/202 word-track-changes/216 word-view-options/210 word-watermarks/214 word-wpf-xpsdocument-imagesource/5201
GemBox.Pdf examples URLs
BASE: https://www.gemboxsoftware.com/pdf/examples/ PDF EXAMPLES: add-export-images-pdf/6001 asp-net-core-create-pdf/1401 basic-pdf-objects/402 blazor-create-pdf/1402 c-sharp-convert-pdf-to-image/208 c-sharp-export-pdf-interactive-form-data/503 c-sharp-pdf-associated-files/704 c-sharp-pdf-embedded-files/701 c-sharp-pdf-file-attachment-annotations/702 c-sharp-pdf-portfolios/703 c-sharp-vb-add-pdf-shapes-paths/306 c-sharp-vb-export-import-images-to-pdf/206 c-sharp-vb-net-create-write-pdf-file/209 c-sharp-vb-net-merge-pdf/201 c-sharp-vb-net-ocr-pdf/408 c-sharp-vb-net-pdf-advanced-electronic-signature-pades/1103 c-sharp-vb-net-pdf-bookmarks-outlines/301 c-sharp-vb-net-pdf-digital-signature-pkcs11-cryptoki/1104 c-sharp-vb-net-pdf-digital-signature-validation/1105 c-sharp-vb-net-pdf-digital-signature/1102 c-sharp-vb-net-pdf-pages/401 c-sharp-vb-net-read-pdf/205 c-sharp-vb-net-redact-content-pdf/410 c-sharp-vb-net-split-pdf/202 c-sharp-vb-pdf-hyperlinks/308 charts-barcodes-slides/309 cloning-pdf-pages/203 convert-pdf-image-png-jpg-csharp/6004 create-pdf-file-maui/1502 create-pdf-file-xamarin/1501 create-pdf-interactive-form-fields/505 create-pdf-on-azure-functions-app-service/1601 create-pdf-on-docker-net-core/1602 create-pdf-on-linux-net-core/1301 decrypt-encrypt-pdf-file/1101 extract-content-pdf/6005 fill-in-pdf-interactive-form/502 flatten-pdf-interactive-form-fields/506 fonts/404 free-trial-professional/601 getting-started/101 incremental-update/204 interactive-form-actions/504 pdf-content-formatting/307 pdf-content-groups/409 pdf-content-streams-and-resources/403 pdf-digital-signature-workflows/1106 pdf-document-properties/302 pdf-form-xobjects/405 pdf-header-footer/304 pdf-marked-content/407 pdf-security-c-sharp/6003 pdf-table-of-contents/310 pdf-viewer-preferences/303 pdf-watermarks/305 pdf-xpsdocument-wpf/1001 png-jpg-images-to-pdf/210 print-pdf-c-sharp/6002 read-merge-split-pdf-classic-asp/1201 read-merge-split-pdf-php/1202 read-merge-split-pdf-python/1203 read-pdf-interactive-form-fields/501
GemBox.Presentation examples URLs
BASE: https://www.gemboxsoftware.com/presentation/examples/ PRESENTATION EXAMPLES: asp-net-core-create-powerpoint-pptx-pdf/2001 asp-net-powerpoint-export/1601 blazor-create-powerpoint/2002 c-sharp-clone-slides/205 c-sharp-convert-powerpoint-to-image/207 c-sharp-convert-powerpoint-to-pdf/204 c-sharp-print-powerpoint/251 c-sharp-vb-net-create-write-powerpoint/202 c-sharp-vb-net-find-replace-text-powerpoint/206 c-sharp-vb-net-open-read-powerpoint/201 c-sharp-vb-net-powerpoint-performance/1501 c-sharp-vb-net-powerpoint-slide-notes/411 c-sharp-vb-net-powerpoint-slides/401 c-sharp-vb-net-pptx-encryption/803 c-sharp-vb-net-pptx/203 create-format-powerpoint-tables-csharp/6001 create-powerpoint-file-maui/2102 create-powerpoint-file-xamarin/2101 create-powerpoint-pdf-on-azure-functions-app-service/2201 create-powerpoint-pdf-on-docker-net-core/2202 create-powerpoint-pdf-on-linux-net-core/1901 create-read-write-powerpoint-classic-asp/1801 create-read-write-powerpoint-php/1802 create-read-write-powerpoint-python/1803 fonts/503 free-trial-professional/901 getting-started/101 pdf-digital-signature/802 pdf-encryption/801 powerpoint-audio-video/406 powerpoint-character-formatting/304 powerpoint-charts/412 powerpoint-comments/408 powerpoint-header-footer/407 powerpoint-hyperlinks/409 powerpoint-list-formatting/305 powerpoint-load-html/208 powerpoint-paragraph-formatting/303 powerpoint-pictures/405 powerpoint-placeholders/402 powerpoint-preservation/701 powerpoint-properties/410 powerpoint-shape-formatting/301 powerpoint-shapes/403 powerpoint-slide-transition/501 powerpoint-slideshow/502 powerpoint-table-formatting/602 powerpoint-tables/601 powerpoint-textbox-formatting/302 powerpoint-textboxes/404 powerpoint-wpf/1701 pptx-digital-signature/805 pptx-modify-protection/804 right-to-left-text/505 unit-conversion/504 vba-macros/506
GemBox.Email examples URLs
BASE: https://www.gemboxsoftware.com/email/examples/ EMAIL EXAMPLES: add-calendar-to-mail-message/903 asp-net-core-mail-message/5101 authenticate-using-oauth-c-sharp-vb/109 blazor-mail-message/5102 c-sharp-convert-email-to-pdf/107 c-sharp-create-send-emails/6001 c-sharp-imap-client/301 c-sharp-oauth-microsoft365-gmail/6002 c-sharp-outlook-msg-eml-mht/106 c-sharp-pop3-client/701 c-sharp-send-bulk-email/804 c-sharp-send-word-as-email/108 c-sharp-smtp-client/801 c-sharp-validate-email/401 c-sharp-vb-net-create-email/601 c-sharp-vb-net-load-email/105 c-sharp-vb-net-mail-merge-datatable/501 c-sharp-vb-net-save-email/104 c-sharp-vb-net-search-emails/308 c-sharp-vb-net-sign-email/1202 create-and-save-calendar/901 folder-flags/305 free-trial-professional/1101 get-email-message-maui/2002 get-email-message-xamarin/2001 getting-started/201 headers/604 imap-email-folders/302 imap-idle/310 list-email-messages-imap/303 list-email-messages-pop/702 load-calendar/902 mailbox-info/703 manipulate-messages-exchange-ews/1002 manipulate-messages-microsoft-graph/3002 mbox/605 message-flags/306 message-headers-imap/307 message-headers-pop/705 modify-folders-exchange-ews/1003 modify-folders-microsoft-graph/3003 receive-read-email-c-sharp-vb/102 reply-forward-email-c-sharp-vb-net/103 search-email-exchange-ews/1004 search-email-microsoft-graph/3004 send-email-c-sharp-vb-asp-net/101 send-email-exchange-ews/1001 send-email-microsoft-graph/3001 send-html-email-with-attachment-c-sharp-vb-net/603 ssl-certificate-validation-imap/309 ssl-certificate-validation-pop/706 ssl-certificate-validation-smtp/803 upload-email-message-exchange/1005 upload-email-message-imap/311 upload-email-message-microsoft-graph/3005
GemBox.Imaging examples URLs
BASE: https://www.gemboxsoftware.com/imaging/examples/ IMAGING EXAMPLES: asp-net-core-crop-image/2101 c-sharp-vb-net-apply-filter-to-image/203 c-sharp-vb-net-convert-image/202 c-sharp-vb-net-crop-image/302 c-sharp-vb-net-merge-split-frames/204 c-sharp-vb-net-read-image/201 c-sharp-vb-net-resize-image/301 c-sharp-vb-net-rotate-flip-image/303 free-trial-professional/1001 getting-started/101 load-edit-save-image-on-linux-net-core/2103 read-image-on-docker-net-core/2102 rotate-flip-image-maui/2105 rotate-flip-image-xamarin/2104
GemBox.PdfViewer examples URLs
BASE: https://www.gemboxsoftware.com/pdfviewer/examples/ PDFVIEWER EXAMPLES: angular-pdf-viewer/205 asp-net-core-pdf-viewer/201 demo/301 free-trial-professional/107 getting-started/101 how-to-digitally-sign-pdf/108 navigation-and-zooming/102 react-pdf-viewer/204 search/103 svelte-pdf-viewer/206 themes/104 themes/105 ui-customization/106 vanilla-js-pdf-viewer/202 vue-js-pdf-viewer/203
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