Why appending AutoFilter corrupts my excel file in this example?

Question

Hi I use the below method to apply an AutoFilter :

public static void ApplyAutofilter(string fileName, string sheetName, string reference)
        {
                 


        

Answer 1

Nice! this works! It helped me to solve my problem. Using the following made the difference

OpenXmlElement preceedingElement = GetPreceedingElement(worksheetPart);
worksheetPart.Worksheet.InsertAfter(autoFilter, preceedingElement);