链接数据库的问题 进来帮个帮吗！！！

/// 数据库连接字符串
/// </summary>
private string m_sConnectionString;



//数据库连接对象
private SqlConnection m_sqlConnection;
private SqlCommand m_sqlCommand;
private SqlTransaction m_sqlTransaction;
private SqlDataAdapter m_sqlDataAdapter ;

/// <summary>
/// 构造函数，初始化内部变量
/// </summary>
public DataBaseOperate(): this( "uid=sa;pwd=;server=.;database=Student ")
{ /\
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|------------这样写是什么意思啊？
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} |
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/// <summary> |
/// 构造函数 |
/// </summary> \/

public DataBaseOperate(string sConnectionString)
{
if (sConnectionString != " ")
{
m_sConnectionString = sConnectionString;

}

}

[解决办法]
真没有见过