listbox

I solved my problem but I need to know why this problem raised to me ?! I write a project that load file to listBox then delete the strings one by one, but when I delete listBox strings this exception raised to me! list index out of bounds (5) ! I type this for loop to read list box and delete strings: for i := 0 to ListBox3.Count -1 do begin ShowMessage(ListBox3.Items[i]); ListBox3.items.Delete(i); end; and my problem solved by do a little change in for-loop statement for i := ListBox3.Items.Count - 1 downto 0 do begin ShowMessage(ListBox3.Items[i]); ListBox3.items.Delete(i); end; Why the

I'm debating between using a <select> or <datalist> to display a drop-down list from which the user can select the items. One downside of the <select> tag is that it's inconsistent as it renders differently in different browsers: some browsers it displays with scroll bar, and for some it's a drop-down list. The <datalist> on the other hand seems good but I just want to know if there is any way to disable the text input where the user can type whatever they want in the text box if they don't click the down arrow button on the input field as shown: ​<form action="demo_form.asp" method="get">

Instead of adding each item one by one to the ListBox destinationList from the string array m_List like this: foreach (object name in m_List) { destinationList.Items.Add((string)name); } Is there any better way I can do it? I don't want to bind the data to the destinationList since I want to delete some entries from the ListBox later on. HTH: string[] list = new string[] { "1", "2", "3" }; ObservableCollection<string> oList; oList = new System.Collections.ObjectModel.ObservableCollection<string>(list); listBox1.DataContext = oList; Binding binding = new Binding(); listBox1.SetBinding(ListBox

The problem I'm running into here is that, when I click on the different file names in the Listbox , the Label changes value one click behind whatever I'm currently clicking on. What am I missing here? import Tkinter as tk class TkTest: def __init__(self, master): self.fraMain = tk.Frame(master) self.fraMain.pack() # Set up a list box containing all the paths to choose from self.lstPaths = tk.Listbox(self.fraMain) paths = [ '/path/file1', '/path/file2', '/path/file3', ] for path in paths: self.lstPaths.insert(tk.END, path) self.lstPaths.bind('<Button-1>', self.update_label) self.lstPaths.pack(

I am trying to insert items into a listbox in my asp.net C# application I concatenate some values and put whitespace in between them but it doesn't show up in the listbox. ListItem lt = new ListItem(); lt.Text = ItemName + " " + barcode + " " + price; // problem lt.Value = barcode; lstMailItems.Items.Add(lt); i even tried lt.Text = ItemName + "\t\t" + barcode + "\t\t" + price; // problem lt.Text = ItemName + "& nbsp;" + barcode + "& nbsp;" + price; // &nbsp shows up as text but that even doesn't seem to work. How can I put whitespace between these strings so that it shows up in the listbox as

The problem is as follows: I connected the ListBox with a list of elements of some custom class ( List<Person> persons = new List<Person>() ) using DataSource property. Of course ValueMember and DisplayMember are both assigned to appropriate properties of this class. When I first load data, everything looks ok. However, when I click on some item (i.e. 7th position, counting from 1) and then rebuild the list AND the number of elements is LESS than 7, as a result I can't see the proper texts on the list. Instead, every item shows up as a class name, preceded by the namespace. In other words,