c#应用程序中的“输入数组长于此表中的列数”

Question

我有 Windows 应用程序，在其中我正在使用两个数据表构建数据集，一个是“产品”，另一个是“TaxView”。我在下面包含示例代码。在此代码中我收到错误 Input array is longer than the number of columns in this table强>

 public DataTable[] getProductViewDetails(ArrayList ssd,ArrayList tax)
        {
            DataTable Products = new DataTable();
            DataColumn SalesDetailID = Products.Columns.Add("SalesDetailID", typeof(System.INT32));
            DataColumn BrandName = Products.Columns.Add("BrandName", typeof(System.String));
            DataColumn ProductName = Products.Columns.Add("ProductName", typeof(System.String));
            DataColumn Quantity = Products.Columns.Add("Quantity", typeof(System.INT32));
            DataColumn Rate = Products.Columns.Add("Rate", typeof(System.INT32));
            DataColumn Per = Products.Columns.Add("Per", typeof(System.String));
            DataColumn Discount = Products.Columns.Add("Discount", typeof(System.String));


            DataTable TaxView = new DataTable();
            DataColumn SalesTaxDetailID = Products.Columns.Add("SalesTaxDetailID", typeof(System.Int32));
            DataColumn TaxAmt = Products.Columns.Add("TaxAmt", typeof(System.Int32));
            DataColumn Total = Products.Columns.Add("Total", typeof(System.Int32));
            DataColumn TaxDesc = Products.Columns.Add("TaxDesc", typeof(System.String));
            DataColumn TaxValues = Products.Columns.Add("TaxValues", typeof(System.INT32));

            foreach (SalesStructDetails s in ssd)
            {
                //int previoustaxdetail;

                Products.Rows.Add(1,HP, Printer, 2, 2100, pcs, 125);

                foreach (TaxDetail t in tax)
                {                                       
                    if (s.SalesDetailId == t.SalesDetailID)
                    {
                        TaxView.Rows.Add(1, 125, 75, VAT, 4);

                    }
                }
            }

            DataTable[] dt = new DataTable[2] { Products, TaxView };
            return dt;
        }

我在 TaxView.Rows.Add(1, 125, 75, VAT, 4);

行遇到错误

Answer 1

仔细查看 - 您正在将税列定义添加到产品表中。而是将它们添加到税表中。示例：

DataTable TaxView = new DataTable();
DataColumn SalesTaxDetailID = Products.Columns.Add(blah);

应该是；

DataTable TaxView = new DataTable();
DataColumn SalesTaxDetailID = TaxView.Columns.Add(blah);

另外：考虑使用常规类而不是 DataTable