Question

我有2个Linq查询按国家和部门过滤员工，如下所示：

Dim employeesTableCountry = From employee In dataSource
                            Where employee.country = selectedCountry
                            Select employee

Dim employeesTableDepartment = From employeeDepartment In dataSource
                               Where employeeDepartment.department = selectedDepartment
                               Select employeeDepartment

我正在尝试合并这两组以制作一个最终的过滤集：

Dim finalTable = employeesTableCountry.Intersect(employeesTableDepartment)

但是，当我这样做时，我收到以下异常消息：

System.InvalidCastException: Unable to cast object of type 'd__92`1[VB$AnonymousType_0`3[System.Data.DataRow]]' to type 'System.Data.EnumerableRowCollection`1[VB$AnonymousType_0`3[System.Data.DataRow]]'

d__92的含义是什么？如何修复此错误？

Answer 1

我通过手动输入我的最终表格解决了我的问题：

Dim finalTable As System.COllections.Generic.IEnumerable(Of System.Data.DataRow)

什么是异常消息中的d__92？

1 个答案: