}
protected void Button1_Click(object sender, EventArgs e)
{
    if (TextBox2.Text == "")
    {
        Response.Write("alert('文件名错误！');location='javascript:history.go(-1)'");
    }
    else
    {
        try
        {
            string path = Server.MapPath("File") + "\" + TextBox2.Text + DropDownList1.Text;
            FileInfo fi = new FileInfo(path);
            if (!fi.Exists)//如果文件不存在
            {
                fi.Create();//创建文件
                Label2.Text = "创建成功！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/") + "复制" + Session["txt"];
        FileInfo fi = new FileInfo(path);
        if (fi.Exists)
        {
            fi.CopyTo(path2);//将指定路径文件夹中的文件拷贝到该文件夹中,并将该文件改名
        }
        Label2.Text = "复制" + Session["txt"] + "成功！" + "文件为:" + ("复制" + Session["txt"].ToString());
        List();
    }
    catch (Exception error)
    {
        Label2.Text = "复制文件出错，该文件已被复制过！";
    }
}
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);//将指定文件夹路径中的文件移动到另一个路径中的文件夹
            List();
        }
        else
        {
            Response.Write("alert('目标文件夹文件已经存在，不能移动改文件！');location='javascript:history.go(-1)'");
        }
    }

}
protected void Button3_Click(object sender, EventArgs e)
{
    if (Session["txt"] == null)
    {
        Label2.Text = "请选中文件后在执行删除操作！";
    }
    FileInfo fi = new FileInfo(Server.MapPath("File/" + Session["txt"]));
    if (fi.Exists)
    {
        fi.Delete();//删除文件
        Label2.Text = "删除" + Session["txt"] + "文件成功！";
        List();
        Session.Clear();//清空变量Session
    }

}
protected void ListBox1_SelectedIndexChanged(object sender, EventArgs e)
{
    Session["txt"] = ListBox1.SelectedValue.ToString();
}
public void List()//获取指定文件夹文件名，并绑定ListBox控件显示在页面中
{
    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();
}