Visual Studio :: Error Unable To Add Data Connection. ExecuteScalar Requires An Open And Available Connection. The Connection's Current State Is Closed?

Sep 13, 2010

I'm using Visual Studio 2008, and my database is SQL Server 2000.

I want to add a connection to the Server Explorer in VS. The Data source is Microsoft SQL Server (SqlClient). After entering in all my information and I click Test Connection, it is successful.

But when I click OK, I get the error:

Unable to add data connection. ExecuteScalar requires an open and available connection. The connection's current state is closed.

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