System.Data.SqlClient.SqlException: SQL Server 不存在或访问被拒绝。 at System.Data.SqlClient.ConnectionPool.GetConnection(Boolean& isInTransaction) at System.Data.SqlClient.SqlConnectionPoolManager.GetPooledConnection(SqlConnectionString options, Boolean& isInTransaction) at System.Data.SqlClient.SqlConnection.Open() at ASP.Bidding_Detail_aspx.page_load(Object sender, EventArgs e)