题
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?
解决方案
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();
}
}
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