Problem with ListBox in ASP.NET

Yes your exactly right, giwa's requirement for disabling the items on selection. And if the case for removing item on selection then we can also use                         
     listBox1.Items.RemoveAt(listBox1.SelectedIndex);

Before my first post, I tried virtually the same code as you and what it did was to remove the items (rather than gray them out) though, admittedly, they do come back when you set Enabled back to true.

On the other hand, when you set Enabled to false for items in the CheckBoxList and RadioButtonList it does gray them out i.e. what you'd normally understand by disabling them.

It may be, of course, that Giwa doesn't mind temporarily removing the items from the ListBox and, if so, then I think your code is the best solution for him.

Hi Vulpes,
   I think you miss understood some whr, my code will work for Items which are in ListBox control and in MSDN link , they are talking about ListItem for RadioButtonList control or a CheckBoxList control.
  and above code i have implemented & it works for me.

 Thanks

There's an example here (http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.listitem.enabled.aspx) which shows how to disable items from a RadioButtonList.

Unfortunately, Shrikant's code doesn't work because as it says in the above link:

"You cannot use this property to disable a ListItem control in a DropDownList control or ListBox control."

Hi Giwa,
  You Can disable the items in listbox , i took one listbox and a button on page. Button is used to retrive items which are disabled in list.

   try this :

      protected void Page_Load(object sender, EventArgs e)
        {
            if (!Page.IsPostBack)
            {
                listBox1.Items.Add("Item1");
                listBox1.Items.Add("Item2");
                listBox1.Items.Add("Item3");
            }
         }

        protected void listBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            listBox1.SelectedItem.Enabled = false;
        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            for (int i = 0; i < listBox1.Items.Count ; i++)
            {
                listBox1.Items[i].Enabled = true;
            }
        }

Hi,
Would really appreciate a snippet on that though.
Cheers