.net - sqlconnection 未定义

Question

我正在尝试更新一些代码。我有一个以此开头的 vb 文件...

Imports System.Data.SqlClient
Imports System.Data.Sql
Imports System.Data.SqlTypes
Imports System.Configuration

<script runat="server">

...这里失败了...

Using oConn As SqlConnection = New SqlConnection(ConfigurationManager.ConnectionStrings("tps_write").ConnectionString())

它返回的错误是...

"Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

Compiler Error Message: BC30002: Type 'SqlConnection' is not defined."

我是否缺少一些系统类？

编辑:我将代码更新为此...

Using oConn As System.Data.SqlClient.SqlConnection = New System.Data.SqlClient.SqlConnection(ConfigurationManager.ConnectionStrings("tps_write").ConnectionString())

...并且它接受它。为什么每次使用该类中的对象时都需要显式写出 System.Data.SqlClient？？？

Answer 1

EDIT: I updated the code to this...

Using oConn As System.Data.SqlClient.SqlConnection = New System.Data.SqlClient.SqlConnection(ConfigurationManager.ConnectionStrings("tps_write").ConnectionString())

...and it accepts it. Why do I need to explicitly write out System.Data.SqlClient every time I use an object from that class???

我最好的猜测是，还有另一个名为 SqlConnection 的类，并且 .NET 不知道要使用哪种类型，直到您指定 System.Data.SqlClient.SqlConnection > 明确的一个。