linq实现左连接
1、左连接： var LeftJoin = from emp in ListOfEmployees join dept in ListOfDepartment on emp.DeptID equals dept.ID into JoinedEmpDept from dept ...
原文：Linq to DataTable 左连接
所先创建 个DataTable并对其赋值,来进行模拟. DataTable dt new DataTable dt .Columns.Add ID , typeof int dt .Columns.Add Name , typeof string dt .Columns.Add GradeId , typeof int DataTable dt new DataTable dt .Columns. ...
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