无法将SQL参数值设置为字符串数组

Question

我想将字符串数组作为SQL参数传递，但是当我执行该命令时，它会抛出一个异常，指出“对象必须实现IConvertible”。这里是代码（所有三列是nvarchar的）：

Public Sub sendsms(messageBodies As String(), ByVal recipientNumbers As String(), Optional ByVal chkMsgIds As string() = Nothing) 
    Dim con As New SqlConnection 
    con.ConnectionString = connection.Sms 
    Dim cmd As New SqlCommand("insert into sentmessage (text,id,number) values (@text,@id,@number)", con) 
    cmd.Parameters.Add("@text", Data.SqlDbType.NVarChar, n).Value = messageBodies 
    cmd.Parameters.Add("@id", Data.SqlDbType.NVarChar, n).Value = chkMsgIds 
    cmd.Parameters.Add("@number", Data.SqlDbType.NVarChar, n).Value = recipientNumbers 
    con.Open() 
    cmd.ExecuteNonQuery() 
    con.Close() 
    cmd.Dispose() 
End Sub 

我创造了这个程序中插入的记录大量到数据库中，什么是正确的做法？

Answer 1

通常情况下，你只需执行多个INSERT命令，每行一个，如：

Public Sub sendsms(messageBodies As String(), ByVal recipientNumbers As String(), Optional ByVal chkMsgIds As string() = Nothing) 
    Using con As New SqlConnection() 
     con.ConnectionString = connection.Sms 
     con.Open() 
     For Each body As String In messageBodies 
      Using cmd As New SqlCommand("insert into sentmessage (text,id,number) values (@text,@id,@number)", con) 
       cmd.Parameters.Add("@text", Data.SqlDbType.NVarChar, n).Value = body 
       cmd.Parameters.Add("@id", Data.SqlDbType.NVarChar, n).Value = chkMsgIds 
       cmd.Parameters.Add("@number", Data.SqlDbType.NVarChar, n).Value = recipientNumbers 
       cmd.ExecuteNonQuery() 
      End Using 
     Next 
    End Using 
End Sub 

然而，在SQL Server 2008中，他们增加了其在这里说明一个新的多行插入语法的支持：

http://blog.sqlauthority.com/2008/07/02/sql-server-2008-insert-multiple-records-using-one-insert-statement-use-of-row-constructor/

例如，您可以执行的命令，例如：

insert into sentmessage (text,id,number) values 
('First',1,1), 
('Second',2,2), 
('Third',3,3) 

Answer 2

只是使用：

cmd.Parameters.AddWithValue("@text", messageBodies) 
cmd.Parameters.AddWithValue("@id",chkMsgIds) 
cmd.Parameters.AddWithValue("@number", recipientNumbers)