數據表“ TruckGrossWeight”運算符后缺少操作數

Question

我有一個要分配選擇查詢的數據表。 但是會彈出以下錯誤： “語法錯誤：'TruckGrossWeight'運算符后缺少操作數。”

DataRow[] drs = dataTableForDropDowns
 .Select("LNGFuelAvailability=" + drpdwnlst_LNGFuelAvailability.SelectedValue + " " +
         "TruckGrossWeight=" + drpdwnlst_TruckGrossCombinedWeight.SelectedValue + "");

所選值（ int ）的值是：

drpdwnlst_LNGFuelAvailability.SelectedValue= 5
drpdwnlst_TruckGrossCombinedWeight.SelectedValue = 2

Answer 1

嘗試下面

DataRow[] drs = dataTableForDropDowns.Select("LNGFuelAvailability = "+drpdwnlst_LNGFuelAvailability.SelectedValue+ " AND TruckGrossWeight = "+drpdwnlst_TruckGrossCombinedWeight.SelectedValue);

語法應如下所示

DataRow[] results = table.Select("A = foo AND B = bar");

要么

DataRow[] results = table.Select("A = foo OR B = bar");