我将一些来自旧版VB应用程序的查询语句复制到C#应用程序.我不熟悉VB,虽然看着它让我想要一个VB(维多利亚苦涩).我遇到了像这样构建的查询：
@H_502_1@*SELECT dp_duckbill_accounts.platypus_no AS duckbill,t_accounts.name AS Name " & _
"FROM t_accounts INNER JOIN dp_duckbill_accounts ON t_accounts.account_no = dp_duckbill_accounts.account_no " & _
"ORDER BY dp_duckbill_accounts.platypus_no*
“& _”让我暂停.如果只是“&”我会认为它对应于“”在C#连接字符串.但是,世界上哪一个是下划线呢？注意&符号和下划线用空格分隔.
下划线是
line continuation character.它允许连接包括不同的线.像这样：
@H_502_1@x = "Hello " & "World"
x = "Hello " & _
"World"
'this won't compile (pre vb.net 2010,anyway)
x = "Hello " &
"World"