将数据透视表字段计算设置为DifferenceFrom next

Question

我尝试在由office.interop创建的数据透视表中设置字段的计算

我需要设置DifferenceFromNext，但是在枚举中，我发现只是DifferenceFrom

public class CartViewModel
{
    public List<CartItemModel> CartItemList { get; set; }

    public decimal NetTotal { get; set; }
    public CartViewModel()
    {
        CartItemList = new List<CartItemModel>();
    }
}

public class CartItemModel
{
    public long CartId { get; set; }
    public long ProductId { get; set; } 
    public string ProductName { get; set; }
    public string ProductImage { get; set; }
    public string VariantName { get; set; }
    public string VariantGroup { get; set; }
    public short Quantity { get; set; }
    public decimal Price { get; set; }
    public decimal DiscountedPrice { get; set; }
    public decimal TotalAmount { get; set; }
    public bool IsPromotional { get; set; }
}

问题是它在错误的字段上计算

Answer 1

解决了设置基础项目的问题，请确保在计算之前先进行设置，然后再设置基础项目，而不是引发异常

 field.Calculation = Microsoft.Office.Interop.Excel.XlPivotFieldCalculation.xlDifferenceFrom;
 field.BaseItem = "(next)";