.net 从foreach中的LINQ中选择2个值

我必须在同一查询中选择另一列，因为在创建单行时，我必须在同一行中添加值

//代码

  'Loop through the transactions
            For Each iTransactionid In (From TransactionFieldLinq In transactionFieldsCollection Select TransactionFieldLinq.TransactionId).Distinct

                'Create a new data row
                DataRow = DataTable.NewRow()

                'Set the data row properties
                DataRow("TransactionId") = iTransactionid

                'Loop through the transaction fields collection
                For Each TransactionField In (From TransactionFieldLinq In transactionFieldsCollection Where TransactionFieldLinq.TransactionId = CInt(DataRow("TransactionId")))

                    'Set the data row properties
                    DataRow(CStr(TransactionField.FieldId)) = TransactionField.FieldValue

                Next

                'Add the data row to the data table
                DataTable.Rows.Add(DataRow)

            Next

'Loop through the transactions
                For Each iTransactionid In (From TransactionFieldLinq In transactionFieldsCollection Select TransactionFieldLinq.TransactionId).Distinct

                    'Create a new data row
                    DataRow = DataTable.NewRow()

                    'Set the data row properties
                    DataRow("TransactionId") = iTransactionid

                    'Loop through the transactions for start date
                    For Each dtStartDate In (From TransactionFieldLinq In transactionFieldsCollection Where TransactionFieldLinq.TransactionId = iTransactionid And TransactionFieldLinq.StartDate <> CDate("12:00:00 AM") Select TransactionFieldLinq.StartDate)

                        'Set the data row properties
                        DataRow("StartDate") = dtStartDate

                    Next
                    'Loop through the transaction fields collection
                    For Each TransactionField In (From TransactionFieldLinq In transactionFieldsCollection Where TransactionFieldLinq.TransactionId = CInt(DataRow("TransactionId")))

                        'Set the data row properties
                        If (TransactionField.FieldId <> 0) Then
                            DataRow(CStr(TransactionField.FieldId)) = TransactionField.FieldValue
                        End If
                    Next

                    'Add the data row to the data table
                    DataTable.Rows.Add(DataRow)

                Next

transactionFieldCollection

有另一个名为

StartDate

的属性，它是

DateTime

格式，我必须在同一查询中选择

StartDate

列，并将其绑定到

DataTable

，就像TransactionId一样

---

我如何才能做到这一点？

您需要一个匿名类型

(From TransactionFieldLinq In transactionFieldsCollection 
 Select TransactionFieldLinq.TransactionId, 
 TransactionFieldLinq.StartDate).Distinct

希望这有帮助

//代码

  'Loop through the transactions
            For Each iTransactionid In (From TransactionFieldLinq In transactionFieldsCollection Select TransactionFieldLinq.TransactionId).Distinct

                'Create a new data row
                DataRow = DataTable.NewRow()

                'Set the data row properties
                DataRow("TransactionId") = iTransactionid

                'Loop through the transaction fields collection
                For Each TransactionField In (From TransactionFieldLinq In transactionFieldsCollection Where TransactionFieldLinq.TransactionId = CInt(DataRow("TransactionId")))

                    'Set the data row properties
                    DataRow(CStr(TransactionField.FieldId)) = TransactionField.FieldValue

                Next

                'Add the data row to the data table
                DataTable.Rows.Add(DataRow)

            Next

'Loop through the transactions
                For Each iTransactionid In (From TransactionFieldLinq In transactionFieldsCollection Select TransactionFieldLinq.TransactionId).Distinct

                    'Create a new data row
                    DataRow = DataTable.NewRow()

                    'Set the data row properties
                    DataRow("TransactionId") = iTransactionid

                    'Loop through the transactions for start date
                    For Each dtStartDate In (From TransactionFieldLinq In transactionFieldsCollection Where TransactionFieldLinq.TransactionId = iTransactionid And TransactionFieldLinq.StartDate <> CDate("12:00:00 AM") Select TransactionFieldLinq.StartDate)

                        'Set the data row properties
                        DataRow("StartDate") = dtStartDate

                    Next
                    'Loop through the transaction fields collection
                    For Each TransactionField In (From TransactionFieldLinq In transactionFieldsCollection Where TransactionFieldLinq.TransactionId = CInt(DataRow("TransactionId")))

                        'Set the data row properties
                        If (TransactionField.FieldId <> 0) Then
                            DataRow(CStr(TransactionField.FieldId)) = TransactionField.FieldValue
                        End If
                    Next

                    'Add the data row to the data table
                    DataTable.Rows.Add(DataRow)

                Next

“在事务中循环
对于中的每个iTransactionid（从transactionFieldsCollection中的TransactionFieldLinq选择TransactionFieldLinq.TransactionId）。不同
'创建新的数据行
DataRow=DataTable.NewRow（）
'设置数据行属性
DataRow（“TransactionId”）=iTransactionid
'循环查看开始日期的事务
对于中的每个dtStartDate（从TransactionFieldLinq中的transactionFieldsCollection，其中TransactionFieldLinq.TransactionId=iTransactionid和TransactionFieldLinq.StartDate CDate（“12:00:00 AM”）选择TransactionFieldLinq.StartDate）
'设置数据行属性
DataRow（“StartDate”）=dtStartDate
下一个
'在事务字段集合中循环
对于中的每个TransactionField（来自transactionFieldsCollection中的TransactionFieldLinq，其中TransactionFieldLinq.TransactionId=CInt（数据行（“TransactionId”））
'设置数据行属性
如果为（TransactionField.FieldId 0），则
DataRow（CStr（TransactionField.FieldId））=TransactionField.FieldValue
如果结束
下一个
'将数据行添加到数据表中
DataTable.Rows.Add（DataRow）
下一个

我已经试过了，但我无法完成全部。你能发布一个完整的吗？