主题：在表BeforeSaveDataRow事件中问题

在表BeforeSaveDataRow事件中输入下面的代码

If e.DataRow("订单编号") Then
    Dim cmd As New SQLCommand
    Dim dt As DataTable
    Dim dr As DataRow = e.DataRow
    cmd.C
    cmd.CommandText = "SELECT * From {生产流程表} Where [订单单号] = '" & dr("订单编号") & "'"
    dt = cmd.ExecuteReader
    If dt.DataRows.Count > 0 Then
     cmd.CommandText = "UPDATE {生产流程表} SET 结束 = True WHERE [订单单号] = '" & dr("订单编号") & "'And [产品编号] = '" & dr("产品编号") & "'"
       cmd.ExecuteNonQuery()      
    End If
End If

当订单编号为"201206-002"出现了图中的错误提示,

订单编号为"201206002"的话又没错误这是怎么回事?