Generate Excel Files in Delphi Without Office Automation
Build XLS and XLSX workbooks from Delphi services without installing Excel: native BIFF and OOXML writers, stream output to HTTP responses, COM-free.
Software Development Blog
Spreadsheet Programming
Developer tutorials for HotXLS, Delphi workbook automation, XLS, XLSX, ODS, formulas, report export, and Office-free spreadsheet pipelines
HotXLS Formula Engine and Custom Functions in Delphi
Evaluate Excel formulas in Delphi with HotXLS: the Calculate engine, OnUserFunction custom functions, array formulas, and why CSV export needs computed values.
Open and Save ODS Files in Delphi with HotXLS
HotXLS opens and saves OpenDocument Spreadsheet files from Delphi: SaveAsODS export options, the lightweight ODS import path, and what survives a round trip.
HotXLS Conditional Formatting and Rich Text in Delphi
Apply cellIs rules, data bars, icon sets, and rich text runs from Delphi with HotXLS, avoiding the dxf style and font pool index traps in XLSX files.
HotXLS Charts and Images: Excel Drawings in Delphi
How to add Excel charts, images, and shapes from Delphi with HotXLS: chart sheets in XLS, embedded charts and pictures in XLSX, EMU sizing, and anchor traps.
Template-Based Excel Report Generation in Delphi with HotXLS
Fill Excel report templates from Delphi with HotXLS: locate placeholders with FindText, clone detail rows, insert rows safely, and recalculate before saving.
HotXLS: Workbook Audit and Format Conversion in Delphi
Audit unknown Excel files from Delphi with HotXLS: count charts, formulas, macros, and protection, then convert XLS, XLSX, and ODS with known fidelity limits.
Exporting Delphi Datasets to Excel Reports with HotXLS
Export TDataset results to Excel from Delphi with HotXLS: TDataToXLS grouping and paging, the VCL dependency trap, XLSX conversion, and a service-safe loop.
HotXLS: Sheet Protection, Page Setup, and Printing in Delphi
Protect worksheets, keep input ranges editable, and control print layout in Delphi with HotXLS: Locked flags, page setup, scaling, and header codes.
Large Excel Workbook Performance in Delphi with HotXLS
Practical HotXLS performance tuning for large Excel files in Delphi: StreamingWrite saves, style pool reuse, row callbacks, and faster read-only loads.
Export Excel to CSV, TSV, and HTML in Delphi (HotXLS)
Export Excel sheets to CSV, TSV, and HTML from Delphi with HotXLS. Covers RFC 4180 quoting, UTF-8 BOM, and why formulas need Calculate before export.
Defined Names and Cross-Sheet Formulas in Delphi (HotXLS)
Create workbook-scoped and sheet-scoped defined names with HotXLS in Delphi, write cross-sheet formulas that survive edits, and avoid _xlnm name conflicts.
HotXLS Data Validation, AutoFilter and Tables in Delphi
Add dropdown validation, AutoFilter criteria, and Excel tables from Delphi with HotXLS, including server-side filter preview and the 0-based column ID trap.
Excel Comments and Hyperlinks in Delphi with HotXLS
Write cell comments with authors, external URLs, and in-workbook links from Delphi using HotXLS, including the XLSX internal-link API and XLS comment quirks.
HotXLS Merged Cells and Report Template Layout in Delphi
How HotXLS handles merged cells in Delphi report templates: anchor-cell semantics, InsertRows shifting rules, merge audits, and HTML and RTF export behavior.
HotXLS: Preserve VBA Macros and External Links in Delphi
How HotXLS preserves VBA projects and external links when Delphi code edits XLS and XLSX workbooks: macro-enabled saves, link targets, and round-trip limits.
HotXLS Streaming Writes for Delphi Server Batch Jobs
Keep large XLSX exports inside memory limits with HotXLS StreamingWrite, row-level write callbacks, style pool reuse, and per-thread batch workbook jobs.
Setting Excel Document Properties in Delphi with HotXLS
Set and read Excel document properties from Delphi with HotXLS: title, author, company, and keywords across BIFF SummaryInformation and OOXML docProps parts.
List Sheet Names Fast in Delphi with HotXLS GetSheetNames
Read worksheet names from XLS, XLSX, and ODS files in Delphi without loading cell data: HotXLS GetSheetNames, encrypted-file detection, intake triage.
Encrypt XLSX Files with AES in Delphi using HotXLS
Write AES-encrypted XLSX files from Delphi with HotXLS SaveAsEncrypted: ECMA-376 Standard Encryption, password handling, and the write-only decryption limit.