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我想让我的头绕着LINQ问题。最终目标是使用从LINQ to SQL(视图)获取的数据加载树视图。问题是当我尝试访问获取的数据时,它一直抛出“运行时不支持的查询运算符”。所涉及的代码是不超过:通过LINQ向树添加节点在运行时创建“查询运算符不受支持”
Dim tasklistdata As New lqDataContext
Dim UserID As Integer
UserID = (From vwUser In tasklistdata.Operators _
Where vwUser.UserName Is Login.txtUsername.Text _
Select vwUser.OperatorID).Single
Dim lqHospitalList = From vwHospitalList In tasklistdata.SPM_Accounts _
Where vwHospitalList.OperatorID = UserID _
Order By vwHospitalList.CustomerName, vwHospitalList.Class _
Select vwHospitalList.CustomerName, vwHospitalList.Class, vwHospitalList.ClassCount, vwHospitalList.Charges
tvHospitalSelect.Nodes.Add(lqHospitalList(0).CustomerName)
如果我修改代码,lqHospitalList.First.CustomerName它能正常工作,但是将其更改为阵列位置是问题出现。请指点我的逻辑缺陷。