Question

您好我在使用这种格式显示金额时出现问题：0,000.00。我使用网格视图和数据读取器显示来自mySQL数据库的数量，其中Decimal作为我的数据类型，我的输出仅显示0000.00

您能帮我解决一下这个问题吗？谢谢。

private void DisplayOrderDetails(int nOrderNo)

        {
            OpenConnection();

            SqlCommand cmdSelect = new SqlCommand();
            cmdSelect.Connection = cn;
            cmdSelect.CommandType = CommandType.Text;
            cmdSelect.Transaction = trnOrder;
            cmdSelect.CommandText =
                "SELECT OrderDetailNo, OrderNo, PackagingOutside, Quantity, Unit, ProductNo, ProductName, " +
                "ProductSize, PackagingInside, " +
                "SellingDiscount1, SellingDiscount2, SellingDiscount3, SellingDiscount4, " +
                "SellingPrice, Amount FROM OrderDetails WHERE OrderNo = '"
                + nOrderNo + "'";

            SqlDataAdapter daDetail = new SqlDataAdapter();
            daDetail.SelectCommand = cmdSelect;

            DataSet ds = new DataSet();
            daDetail.Fill(ds, "OrderDetails");

            grdDetails.DataSource = null;
            grdDetails.DataSource = ds.Tables["OrderDetails"];

            DisplayTotal();
        }

 private void DisplayTotal()

        {
            double dTotal = 0;

            //for encountering errors in the future
            try
            {
                for (int nRow = 0;
                    nRow <= dsDetail.Tables["OrderDetails"].Rows.Count - 1;
                    nRow++)
                {
                    dTotal = dTotal + 
                        Convert.ToDouble(dsDetail.Tables["OrderDetails"].Rows[nRow]["Amount"].ToString());
                }
            }
            catch //(Exception ex)
            {
                //MessageBox.Show(ex.Message);
            }

            lblTotal.Text = String.Format("{0:#,###,##0.00}", dTotal);
        }

Answer 1

对于金钱或货币格式，您需要使用C

因此将代码更改为

 lblTotal.Text = dTotal.ToString("C", CultureInfo.CurrentCulture);

或

 lblTotal.Text = String.Format("{0:C}", dTotal);

Reference

Answer 2

lblTotal.Text = dTotal.ToString("C");

不要忘记它使用默认的cultureinfo并显示默认货币。您还可以通过提供CultureInfo

的实例来更改此行为

http://msdn.microsoft.com/en-us/library/shxtf045.aspx

Answer 3

您可以使用CultureInfo对象并将目标文化传递给String.Format，然后使用正确的文化信息显示货币和其他字符串：

var cultureInfo = System.Globalization.CultureInfo.CreateSpecificCulture("de-DE"); // for example, the German culture info will give you the commas for thousand separators instead of the decimal point
lblTotal.Text = String.Format(cultureInfo, "{0:C}", dTotal);

CultureInfo.CreateSpecificCulture的参考：http://msdn.microsoft.com/en-us/library/system.globalization.cultureinfo.createspecificculture.aspx 参考String.Format的上述重载：http://msdn.microsoft.com/en-us/library/1ksz8yb7.aspx

本节可能值得阅读String.Format文档：http://msdn.microsoft.com/en-us/library/system.string.format.aspx#Format_Culture

如何在C＃中显示货币格式

3 个答案: