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我怎么解决这个问题？我不想使用两个连接。ExecuteNonQuery 仅在阅读器关闭时才有效。

oleCnn = New System.Data.OleDb.OleDbConnection
oleCnn.ConnectionString = ConnectionString
oleCmm = New OleDb.OleDbCommand()
oleCnn.Open()
oleStr = "SELECT ID_Process FROM MyProcessTable"
Dim reader As System.Data.OleDb.OleDbDataReader = oleCmm.ExecuteReader()
        While reader.Read()
            For i = 1 To NumExecutions
                    oleStr = "INSERT INTO MyOtherProcessTable(reader.getInt32(0))"           
                    oleCmm.ExecuteNonQuery()
            Next
        End While
reader.Close()
oleCnn.Close()

谢谢

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1 回答 1

2

在读取时使用列表存储您的 ID DataReader，然后对于列表的每个元素，您应该能够使用相同的连接执行查询：

oleCnn = New System.Data.OleDb.OleDbConnection
oleCnn.ConnectionString = ConnectionString
oleCmm = New OleDb.OleDbCommand()
oleCnn.Open()
oleStr = "SELECT ID_Process FROM MyProcessTable"

Dim ids As New List(Of Integer)

Dim reader As System.Data.OleDb.OleDbDataReader = oleCmm.ExecuteReader()
    While reader.Read()
    ids.Add(reader.GetInt32(0))
    End While
reader.Close()

For Each curr_id As Integer In ids
    For i = 1 To NumExecutions
        oleStr = "INSERT INTO MyOtherProcessTable(" & curr_id.ToString & ")"
        oleCmm.ExecuteNonQuery()
    Next
Next
oleCnn.Close()

PS我不明白For i = 1 To NumExecutionsfor循环，但我在你写的时候添加了它

于 2013-10-11T10:50:49.440 回答