{{< blocks/products/pf/main-wrap-class >}} {{< blocks/products/cells/cells-cloud-ai-assistant >}} {{< blocks/products/cells/cells-cloud-upper-banner h1="Fügen Sie Textwasserzeichen zu Excel-Dateien......0/cells/watermark" %}} {{< blocks/products/...OpenRead(filePath); request.File.Add(filePath, fileStream); request...