35 lines
1.5 KiB
Markdown
35 lines
1.5 KiB
Markdown
## SqlConnection can no longer connect to SQL Server 1997 or databases using the VIA adapter
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### Scope
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Edge
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### Version Introduced
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4.5
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### Source Analyzer Status
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Planned
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### Change Description
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Connections to SQL Server databases using the [Virtual Interface Adapter (VIA) protocol](https://technet.microsoft.com/en-us/library/ms191229%28v=sql.105%29.aspx) are no longer supported.
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The protocol used to connect to a SQL Server database is visible in the connection string. A VIA connection will contain via:\<servername\>.
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If this app is connecting to SQL via a protocol other than VIA (tcp: or np: for example), then no breaking change will be encountered.
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Also, connections to SQL Server 7 (1997) are no longer supported.
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- [ ] Quirked
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- [ ] Build-time break
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### Recommended Action
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The VIA protocol is deprecated, so an alternative protocol should be used to connect to SQL databases. The most common protocol used is TCP/IP. Instructions for enabling the TCP/IP protocol can be found [here](https://msdn.microsoft.com/en-us/library/bb909712(v=vs.90).aspx). If the database is only accessed from within an intranet, the shared pipes protocol may provide better performance if the network is slow.
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### Affected APIs
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* `M:System.Data.SqlClient.SqlConnection.#ctor(System.String)`
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* `M:System.Data.SqlClient.SqlConnection.#ctor(System.String,System.Data.SqlClient.SqlCredential)`
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### Category
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Data
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[More information](https://msdn.microsoft.com/en-us/library/hh367887%28v=vs.110%29.aspx#sql)
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<!-- breaking change id: 70 -->
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