高人指点!!
ds.tables[0].Compute("Sum(Total)","id=5 and id=6 and id=7"),
还是 ds.tables[0].Compute("Sum(Total)","id=5","id=6","id=7"); 哪个是正确的 还是都不正确啊 高人指点下
ds.tables[0].Compute("Sum(Total)","id=5 and id=6 and id=7"),
还是 ds.tables[0].Compute("Sum(Total)","id=5","id=6","id=7"); 哪个是正确的 还是都不正确啊 高人指点下
public Object Compute (
string expression,
string filter
)
所以第一个是正确的
Visual Basic(声明)
Public Function Compute ( _
expression As String, _
filter As String _
) As Object
Visual Basic(用法)
Dim instance As DataTable
Dim expression As String
Dim filter As String
Dim returnValue As ObjectreturnValue = instance.Compute(expression, _
filter)
C#
public Object Compute(
string expression,
string filter
)
Visual C++
public:
Object^ Compute(
String^ expression,
String^ filter
)
J#
public Object Compute(
String expression,
String filter
)
JScript
public function Compute(
expression : String,
filter : String
) : Object
参数
expression
类型:System..::.String要计算的表达式。filter
类型:System..::.String要限制在表达式中进行计算的行的筛选器。返回值
类型:System..::.ObjectObject,设置为计算结果。