c# - 'TruckGrossWeight' 运算符后的数据表缺少操作数

Question

我有一个要分配选择查询的数据表。但是会弹出以下错误：“语法错误：'TruckGrossWeight'运算符后缺少操作数。”

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

选定值 ( int ) 的值是：

drpdwnlst_LNGFuelAvailability.SelectedValue= 5
drpdwnlst_TruckGrossCombinedWeight.SelectedValue = 2

Answer 1

试试下面

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

语法应如下所示

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

或者

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