EF做資料繫結時一些神奇問題

1.使用代碼對繫結控制項附值後需要調用BindingSource1.EndEdit(),以提交編輯到對應的資料來源

2.有總數、金額、單價三個輸TextBox，結果發現每次切換表格選中行時，記錄老變成修改狀態，找了半天發現是因為
在總數，金額的TextChanged中會自動計算單價並其設定txtUnitPrice.Text=xxx.xx，引起的

解決代碼

                decimal amount = 0;
                decimal totalMoney = 0;
                if (decimal.TryParse(amountTextBox.Text, out amount)
                   && decimal.TryParse(totalMoneyTextBox.Text, out totalMoney)
                   && amount != 0
                  )
                {
                    var curV= (totalMoney / amount).ToString("0.00");

                    var curObj = BindingSrc.Current as BuyRecord;
                    if (curObj != null && curObj.UnitPrice.HasValue)
                    {
                        if (curObj.UnitPrice.Value.ToString("0.00") == curV)
                        {
                            return;
                        }
                    }
                    unitPriceTextBox.Text = curV;
                    this.buyRecordBindingSource.EndEdit();

                }