protected void Page_Load(object sender, EventArgs e)
{
    if (!Page.IsPostBack)
    {
        this.List();
    }

}
protected void Button1_Click(object sender, EventArgs e)
{
    if (TextBox2.Text == "")
    {
        Response.Write("<script language=javascript>alert('文件名錯誤！');location='javascript:history.go(-1)'</script>");
    }
    else
    {
        try
        {
            string path = Server.MapPath("File") + "http://" + TextBox2.Text + DropDownList1.Text;
            FileInfo fi = new FileInfo(path);
            if (!fi.Exists)//如果文件不存在
            {
                fi.Create();//創建文件
                Label2.Text = "創建成功！文件名：" + TextBox2.Text + DropDownList1.Text;
                List();
            }
        }
        catch (Exception error)
        {
            Response.Write(error.ToString());
        }
    }
}
protected void Button2_Click(object sender, EventArgs e)
{
    try
    {
        string path = Server.MapPath("File/") + Session["txt"];
        string path2 = Server.MapPath("File/") + "復制" + Session["txt"];
        FileInfo fi = new FileInfo(path);
        if (fi.Exists)
        {
            fi.CopyTo(path2);//將指定路徑文件夾中的文件拷貝到該文件夾中,并將該文件改名
        }
        Label2.Text = "復制" + Session["txt"] + "成功！" + "文件為:" + ("復制" + Session["txt"].ToString());
        List();
    }
    catch (Exception error)
    {
        Label2.Text = "復制文件出錯，該文件已被復制過！";
    }
}
protected void Button4_Click(object sender, EventArgs e)
{
    string path = Server.MapPath("File/") + ListBox1.SelectedValue.ToString();
    string path2 = Server.MapPath("file2/") + ListBox1.SelectedValue.ToString();
    FileInfo fi = new FileInfo(path);
    FileInfo fi2 = new FileInfo(path2);
    if (fi.Exists)
    {
        if (!fi2.Exists)
        {
            fi.MoveTo(path2);//將指定文件夾路徑中的文件移動到另一個路徑中的文件夾
            List();
        }
        else
        {
            Response.Write("<script language=javascript>alert('目標文件夾文件已經存在，不能移動改文件！');location='javascript:history.go(-1)'</script>");
        }
    }

}
protected void Button3_Click(object sender, EventArgs e)
{
    if (Session["txt"] == null)
    {
        Label2.Text = "請選中文件后在執行刪除操作！";
    }
    FileInfo fi = new FileInfo(Server.MapPath("File/" + Session["txt"]));
    if (fi.Exists)
    {
        fi.Delete();//刪除文件
        Label2.Text = "刪除" + Session["txt"] + "文件成功！";
        List();
        Session.Clear();//清空變量Session
    }

}
protected void ListBox1_SelectedIndexChanged(object sender, EventArgs e)
{
    Session["txt"] = ListBox1.SelectedValue.ToString();
}
public void List()//獲取指定文件夾文件名，并綁定ListBox控件顯示在頁面中
{
    DataTable dt = new DataTable();
    dt.Columns.Add(new DataColumn("Name", typeof(string)));
    string serverPath = Server.MapPath("File");
    DirectoryInfo dir = new DirectoryInfo(serverPath);
    foreach (FileInfo fileName in dir.GetFiles())
    {
        DataRow dr = dt.NewRow();
        dr[0] = fileName;
        dt.Rows.Add(dr);
    }
    ListBox1.DataSource = dt;
    ListBox1.DataTextField = "Name";
    ListBox1.DataValueField = "Name";
    ListBox1.SelectedIndex = 0;
    ListBox1.DataBind();
}