查询数据表的条件

Question

我有一个有两列的数据表,

Column 1 = "EmpID"
Column 2 = "EmpName"

我想查询数据表,对列EmpID和 Empname.

例如,我想获取值在哪里

(EmpName != 'abc' or EmpName != 'xyz') and (EmpID = 5)

Answer 1

像这样......

var res = from row in myDTable.AsEnumerable()
where row.Field<int>("EmpID") == 5 &&
(row.Field<string>("EmpName") != "abc" ||
row.Field<string>("EmpName") != "xyz")
select row;

另请参阅 DataTable上的LINQ查询

Answer 2

正如mamoo所示,你可以用Linq做到这一点,但是老歌也很好:

var filteredDataTable = dt.Select(@"EmpId > 2
    AND (EmpName <> 'abc' OR EmpName <> 'xyz')
    AND EmpName like '%il%'" );

Answer 3

这样的事情？:

DataTable dt = ...
DataView dv = new DataView(dt);
dv.RowFilter = "(EmpName != 'abc' or EmpName != 'xyz') and (EmpID = 5)"

这是你在寻找什么？