c# - .RowFilter 与 "IN"和 "NOT IN"

Question

我在将 RowFilter 应用于 DataGridView 时遇到问题。我确实需要使用 IN 和 NOT IN 应用 RowFilter。

例子:

custId in (select custId from loginDetails where date = '01/11/2010')

注意:我的网格最初加载了 CustMaster 表中的所有客户详细信息。我需要的是过滤今天登录的客户的登录详细信息。字段 custId 也是动态的。

这可能吗？

如果有任何替代方案，请提供帮助。

Answer 1

使用 LINQ 怎么样？

//1. Pick all of those that you do not want in your code.
//2. Select those that you want.
var result = from record in dtLoginDetails.AsEnumerable()
                where //2. Select all records.
                (!( //Remove the ! sign to use IN/NOT IN
                (from custID in dtLoginDetails.AsEnumerable()
                    where custID.Field<string>("author").StartsWith("C") //1. Select those records that are unwanted.
                    //Note that, in your case you can add it like 
                    //unwanted.Field<DateTime>("Date") = DateTime.Now.Date
                select custID.Field<string>("author") 
                )
                .Contains(record.Field<string>("author"))
                )

                )
                select record;

//Cast as DataView
DataView view = result.AsDataView();