未将对象实例化问题
using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.IO;
using System.Collections;
public class onlineMag:Page
{
public Button downopen,postup,createbtn,del;
public TextBox createdir;
public HtmlInputFile postfile;
public ListBox showfile;
public static string CurrentPath;
public void Page_Load(object sender,EventArgs e)
{
if(!IsPostBack)
{
CurrentPath=Server.MapPath( "../CS ");
if(!Directory.Exists(Server.MapPath( "../CS ")))
{
Directory.CreateDirectory(Server.MapPath( "../CS "));
}
LoadDir(CurrentPath);
}
}
public void LoadDir(string fullpath)
{
CurrentPath=fullpath;
ArrayList values=new ArrayList();
string[] myfile,mydir;
if(CurrentPath!=Server.MapPath( "../WebSite "))
{
values.Add( "返回上级目录 ");
}
myfile=Directory.GetFiles(fullpath);
values.AddRange(myfile);
mydir=Directory.GetDirectories(fullpath);
values.AddRange(mydir);
showfile.DataSource=values;
showfile.DataBind();
}
public void del_Click(object sender,EventArgs e)
{
CurrentPath=Server.MapPath( "../CS ");
LoadDir(CurrentPath);
File.Delete(Server.MapPath(Path.GetFileName(showfile.SelectedItem.Text)));
}
}
运行File.Delete(Server.MapPath(Path.GetFileName(showfile.SelectedItem.Text)));
就出现未将对象实例化
[解决办法]
看看aspx页里面有没有showfile这个ListBox控件
[解决办法]
ding
[解决办法]
Path.GetFileName
这个有问题。没有实例化过
