dataset 修改小数点位数

        #region dataset过滤器（修改小数点位数）导出使用
        public DataSet ChangeDataSetValue(DataSet dataset)
        {
            foreach (DataTable dt in dataset.Tables)   //遍历所有的datatable
            {
                //dt.Columns[i].DataType.ToString();

                foreach (DataRow dr in dt.Rows)
                {  ///遍历所有的行
                    //foreach (DataColumn dc in dt.Columns)
                    //{  //遍历所有的列
                    //}

                    foreach (DataColumn dc in dt.Columns)
                    {
                        Type type = dc.DataType;
                        string neam = type.Name;
                        if (neam == "decimal" || neam == "Decimal")
                        {
                            var value = dr[dc];
                            if (value == DBNull.Value)
                            {
                                value = 0;
                            }
                            decimal temp = Convert.ToDecimal(value);
                            dr[dc] = Math.Round(temp, 2);
                        }
                    }

                }
            }
            return dataset;
        }

        #endregion

　　

 #region dataset过滤器（修改小数点位数）导出使用
        public DataSet ChangeDataSetValue(DataSet dataset)
        {
            foreach (DataTable dt in dataset.Tables)   //遍历所有的datatable
            {
                foreach (DataRow dr in dt.Rows)
                {  ///遍历所有的行
                    //foreach (DataColumn dc in dt.Columns)
                    //{  //遍历所有的列
                    //}

                    if (dt.Columns.Contains("PurchaseAmount"))
                    {
                        decimal PurchaseAmount = Convert.IsDBNull(dr["PurchaseAmount"]) ? 0 : Convert.ToDecimal(dr["PurchaseAmount"]);
                        dr["PurchaseAmount"] = Math.Round(PurchaseAmount, 2);
                    }
                    if (dt.Columns.Contains("SalesAmount"))
                    {
                        decimal PurchaseAmount = Convert.IsDBNull(dr["SalesAmount"]) ? 0 : Convert.ToDecimal(dr["SalesAmount"]);
                        dr["SalesAmount"] = Math.Round(PurchaseAmount, 2);
                    }
                    if (dt.Columns.Contains("DxdaAmount"))
                    {
                        decimal DxdaAmount = Convert.IsDBNull(dr["DxdaAmount"]) ? 0 : Convert.ToDecimal(dr["DxdaAmount"]);
                        dr["DxdaAmount"] = Math.Round(DxdaAmount, 2);
                    }
                    if (dt.Columns.Contains("UnpayAmount"))
                    {
                        decimal UnpayAmount = Convert.IsDBNull(dr["UnpayAmount"]) ? 0 : Convert.ToDecimal(dr["UnpayAmount"]);
                        dr["UnpayAmount"] = Math.Round(UnpayAmount, 2);
                    }
                    if (dt.Columns.Contains("NowAmount"))
                    {
                        decimal PurchaseAmount = Convert.IsDBNull(dr["NowAmount"]) ? 0 : Convert.ToDecimal(dr["NowAmount"]);
                        dr["NowAmount"] = Math.Round(PurchaseAmount, 2);
                    }

                    if (dt.Columns.Contains("CoreAmount"))
                    {
                        decimal CoreAmount = Convert.IsDBNull(dr["CoreAmount"]) ? 0 : Convert.ToDecimal(dr["CoreAmount"]);
                        dr["CoreAmount"] = Math.Round(CoreAmount, 2);
                    }
                    if (dt.Columns.Contains("DealerAmount"))
                    {
                        decimal DealerAmount = Convert.IsDBNull(dr["DealerAmount"]) ? 0 : Convert.ToDecimal(dr["DealerAmount"]);
                        dr["DealerAmount"] = Math.Round(DealerAmount, 2);
                    }


                }
            }
            return dataset;
        }

        #endregion