超时未在SQL连接工作

Question

我有这样的简单的代码来测试一个DB已准备就绪：

Function testlocalcon() As Boolean
    Dim constr As String = _clconstr

    Try
        Using t As New SqlConnection()
            constr = constr & " ; Connect Timeout=1"

            If Not t.State = Data.ConnectionState.Open Then
                t.ConnectionString = constr

                t.Open()
                If t.State = Data.ConnectionState.Open Then
                    Return True
                Else
                    Return False
                End If
            Else
                Return True
            End If
        End Using
    Catch ex As Exception
        Return False
    End Try
End Function

我不希望执行一个查询，只是为了检查的连接，但无论什么时候出参数被忽略。我在这里（＃1）和互联网搜索并没有发现在如何解决这个问题。

任何其他人有这个问题？或者，是否有关于如何让程序知道，数据库已准备好任何其他的想法？

Answer 1

我的代码differenc道歉但这是C＃，我已经在过去使用它。其非常简单，应该是可读的。

private SQLServerConnection
private SqlConnection _SQLServerConnection;
public SqlConnection SQLServerConnection
    {
        get
        {
            return _SQLServerConnection;
        }
        set
        {
            _SQLServerConnection = value;
        }
    }

private void SetSQLServerConnectionString (string sqlServerName, string databaseName, string saPassword, int connectTimeout)
{
    SQLServerConnection = new SqlConnection("Password=" + saPassword + ";Persist Security Info=True;User ID=sa;Initial Catalog=" + databaseName + ";Data Source=" + sqlServerName + ";connection timeout=" + connectTimeout.ToString(CultureInfo.InvariantCulture));
}

internal bool TestSQLServerConnection(string sqlServerName, string databaseName, string saPassword, int connectTimeout)
{
    try
    {
        SetSQLServerConnectionString(sqlServerName, databaseName, saPassword, connectTimeout);
        SQLServerConnection.Open();
        return true;
    }
    catch (SqlException e)
    {

        return false;
    }
    finally
    {
        SQLServerConnection.Close();
    }
}