Learn how to export Excel chart objects to PNG, JPEG, PDF, SVG, TIFF, EMF, WMF, and other formats using Aspose.Cells Cloud REST API or SDKs. Includes authentication, a cURL example, and code samples for multiple languages....API with cURL and upload a workbook using multipart/form‑data...\ -F "File=@/path/to/your/workbook.xlsx" Response { "Files" :...