Export Excel chart objects to popular Formats such as PNG, JPEG, PDF, SVG, TIFF, EMF, WMF, and more using Aspose.Cells Cloud REST API or SDKs. Includes authentication, a cURL example, and code samples for multiple languages....upload a workbook using multipart/form‑data. curl -X POST "https://api...multipart/form-data" \ -H "Content-Type: multipart/form-data" \...