c#文件的复制,移动,创建(实例代码)

}
protected void button1_click(object sender, eventargs e)
{
    if (textbox2.text == "")
    {
        response.write("<script language=javascript>alert('文件名错误！');location='javascript:history.go(-1)'</script>");
    }
    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("<script language=javascript>alert('目标文件夹文件已经存在，不能移动改文件！');location='javascript:history.go(-1)'</script>");
        }
    }

}
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();
}