求高手指点 ASP.NET ----ListBox控件问题??
在ListBox控件中怎么获取选种行?
ListBox1.SelectedItem.Text;获取不到值,为什么?
<asp:ListBox ID="ListBox1" runat="server" Height="344px"
OnSelectedIndexChanged="ListBox1_SelectedIndexChanged"
Width="409px"></asp:ListBox>public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string dir = @"G:\PHOTO";
ListBox1.DataSource = ListFiles(new DirectoryInfo(dir));
ListBox1.DataBind();
}
public Array ListFiles(DirectoryInfo dir)
{
if (!dir.Exists)
return null; if (dir == null)
return null; FileSystemInfo[] files = dir.GetFileSystemInfos();
ArrayList al = new ArrayList();
for (int i = 0; i < files.Length; i++)
{
FileInfo file = files[i] as FileInfo;
if (file != null && file.Extension == ".jpg")
{
al.Add(file.FullName.Substring(file.FullName.LastIndexOf(@"\") + 1));
}
}
Array a = al.ToArray();
Array.Sort(a);
Array.Reverse(a);
return a;
}
protected void ListBox1_SelectedIndexChanged(object sender, EventArgs e)
{
int index = ListBox1.SelectedIndex; ;
}
protected void Button1_Click(object sender, EventArgs e)
{
TextBox1.Text = ListBox1.SelectedItem.Text;
}
}
在ListBox控件中怎么获取选种行?
ListBox1.SelectedItem.Text;获取不到值,为什么?
<asp:ListBox ID="ListBox1" runat="server" Height="344px"
OnSelectedIndexChanged="ListBox1_SelectedIndexChanged"
Width="409px"></asp:ListBox>public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string dir = @"G:\PHOTO";
ListBox1.DataSource = ListFiles(new DirectoryInfo(dir));
ListBox1.DataBind();
}
public Array ListFiles(DirectoryInfo dir)
{
if (!dir.Exists)
return null; if (dir == null)
return null; FileSystemInfo[] files = dir.GetFileSystemInfos();
ArrayList al = new ArrayList();
for (int i = 0; i < files.Length; i++)
{
FileInfo file = files[i] as FileInfo;
if (file != null && file.Extension == ".jpg")
{
al.Add(file.FullName.Substring(file.FullName.LastIndexOf(@"\") + 1));
}
}
Array a = al.ToArray();
Array.Sort(a);
Array.Reverse(a);
return a;
}
protected void ListBox1_SelectedIndexChanged(object sender, EventArgs e)
{
int index = ListBox1.SelectedIndex; ;
}
protected void Button1_Click(object sender, EventArgs e)
{
TextBox1.Text = ListBox1.SelectedItem.Text;
}
}
ListBox1.DataBind();放在
if(!IsPostBack)
{
ListBox1.DataSource = ListFiles(new DirectoryInfo(dir));
ListBox1.DataBind();
}
if(!IsPostBack)
判断一下的下次你第一个帖子说清楚,就不用再发第二个了...