CODEWITHSUNDEEP
c#asp.netlistboxmulti-select
Armaan Labib
Armaan Labib

Reputation: 165

Select multiple items in ListBox programmatically?

I'm trying to select ListBox items through C#. I am not able to select multiple items, it always select the last value which is in my selected items list.

I tried to loop through each ListBoxItem and check if it exists in my selected items list or not. 

 List<int> SelectedItems = new List<int>();
 SqlCommand cmd = new SqlCommand(Query, con)
 con.Open();
 SqlDataReader dr = cmd.ExecuteReader();
 while (dr.Read()) {
   SelectedItems.Add(Convert.ToInt32(dr["RecordId"].ToString()));
 }
 for (int i = 0; i < listbox.Items.Count; i++) {
     int x = Convert.ToInt32(listbox.Items[i].Value.ToString());
     if(SelectedItems.Contains(x)){
     listbox.SelectionMode = listbox.Multiple;
     listbox.SelectedIndex = i;
     }
  }

I need to select multiple items not only the last selected value. What am I doing wrong?

Upvotes: 2

Views: 1378

Answers (2)

Mojtaba Nava
Mojtaba Nava

Reputation: 878

You can use this:

LblDisplay.Text = "";
lstPromote_products.SetItemChecked(4, true);
chkRestricted.Checked = true;

Upvotes: 0

U. Bulle
U. Bulle

Reputation: 1105

Instead of setting SelectedIndex property, try adding items with listbox.SetSelected with listbox.SetSelected(x,true);

Upvotes: 2

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