C# 获得父目录,指定级父目录

//方法一：使用算法

private string get_dir_parent1(string dir, int n) //n为几级父目录

{

    string[] st = dir.Split('//');

 

    string rst = st[0];

    if (st.Length - n >0)

    {

        for (int i = 1; i < st.Length - n; i++)

        {

 

            rst += '//' + st[i];

 

        }

    }

    else

    {

        rst += '//';

    }

    return rst;

 

}

//方法二：使用目录函数

private string get_dir_parent(string dir, int n) //n为几级父目录

{

    string st = System.Environment.CurrentDirectory;

    try

    {

        System.Environment.CurrentDirectory = dir;

 

        for (int i = 1; i <= n; i++)

        {

 

            System.Environment.CurrentDirectory = "..";

 

        }

        return System.Environment.CurrentDirectory;

    }

    finally

    {

        System.Environment.CurrentDirectory = st;//恢复最初

    }

}

 

//测试 闫磊 Email:[email protected],[email protected] 2006.10.11

private void button2_Click(object sender, EventArgs e)

{

 

    string Dir = get_dir_parent(Application.StartupPath, 7);

    MessageBox.Show(Dir);

    Dir = get_dir_parent1(Application.StartupPath, 7);

    MessageBox.Show(Dir);

 

}