如何在不修改旧文件的情况下使用 Openxml 读取模板 excel 文件并保存为不同的文件？

Question

I have a requirement in which let say we have one excel template in which some fields needs to fill up with their corresponding values. After writing the data in that excel file, we want to save that as different file without modifying the existing template and close the excel.

I am using OpenXML SDK to read and edit excel files in DOT Net Core. I have figure out one way to solve this requirement by first copying the template into new file then editing that template using OpenXML and save it.

Note: doc.SaveAs("newfile.xltx") // This will create new file but also makes the changes in the existing template. So this cannot be used.

Answer 1

File.Copy("template.xltx", "newfile.xltx");

using (SpreadsheetDocument document = SpreadsheetDocument.Open("newfile.xltx", true))
{
    WorkbookPart wbPart = document.WorkbookPart;
    
    //Do work here to fill in fields.
    
    //This will save the changes made in newfile.xltx without changing the template.
    wbPart.Workbook.Save();
}

I would love to know if there is any other way of doing it.