ListBox problem

alexjjj

How to get the value in ListBox? ?
How to clear the data in listBox? ?
anxious

shenmue024

Response.Write (Request.Form ["ListBox1"]);

shenmue024

this.ListBox1.Items.Clear ();

alexjjj

this.ListBox2.Items.Add (Request.Form [ListBox1] .ToString ());
What's wrong? ? How to change? ?

shenmue024

Should be Request.Form ["ListBox1"]


Why use it like this? Guide this value (may be multiple 1, 2, 3) to listbox2?

alexjjj

Because the value in listbox1 needs to be taken out and displayed in listbox2
?
this.ListBox2.Items.Add (Request.Form [ListBox1]);
No way

alexjjj

Sorry, there is no "", OK.
Thank you

alexjjj

Oh, can you enter data in listbox
? ? If so, how to write it? ?
thank

saintfrosty

Roughly:

foreach (ListItem item in ListBox1.Items)
  if (item.Selected)
  {
     string s = item.Value; //.Text?
     if (! ListBox2.Items.FindByValue (s))
        ListBox2.Items.Add (new ListItem (item.Text, item.Value));
  }

saintfrosty

Change it:

if (! ListBox2.Items.FindByValue (s))-> if (ListBox2.Items.FindByValue (s) == null)