How to select item in ListBox

Question

I am trying to select item in ListBox in program, but I was so far unable to do so.

I looked for the answer but everything I found was to use ListBox.SetSelected() method, but I don't have anything like that awaiable.

I discovered that there are two completely different ListBoxes and I am using the second one:

System.Windows.Forms.ListBox
System.Windows.Controls.ListBox

All items in the ListBox are added via Binding, which doesn't help either. Any ideas?

EDIT :

I just found that this works:

listBox.SelectedIndex = 5;
listBox.UpdateLayout();
listBox.Focus();

Apparently, I was missing the last method, which sets the highlight to the selected item, which was updating fine even before.

can you please show some more code including what you have tried in order to set the selected item in the listbox? — Rick james
– Rick james, Commented Feb 16, 2017 at 13:53

Ousmane D. · Accepted Answer · 2017-02-16 13:54:04Z

2

have you tried SelectedItem.

example:

private void listBox1_SelectedIndexChanged(object sender, System.EventArgs e)
{
   // Get the currently selected item in the ListBox.
   string curItem = listBox1.SelectedItem.ToString();

}

answered Feb 16, 2017 at 13:54

Ousmane D.

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Rick james · Accepted Answer · 2017-02-16 13:55:37Z

2

Here is the documentation from the MSDN site on setting the selected item in a listbox. Here it is being done on a button click event.

private void button1_Click(object sender, System.EventArgs e)
{
    listBox1.Items.Add("One");
    listBox1.Items.Add("Two");
    listBox1.Items.Add("Three");
    listBox1.SelectedIndex = listBox1.FindString("Two");
}

answered Feb 16, 2017 at 13:55

Rick james

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1 Comment

L. Zeda Over a year ago

Well thanx, but this one is from System.Windows.Forms.ListBox which I am not using. There is no FindString()...

Artur Udod · Accepted Answer · 2017-02-16 13:54:21Z

1

Have you tried setting it via the SelectedIndex https://msdn.microsoft.com/en-gb/library/system.windows.controls.primitives.selector.selectedindex(v=vs.110).aspx or the SelectedItem https://msdn.microsoft.com/en-gb/library/system.windows.controls.primitives.selector.selecteditem(v=vs.110).aspx or SelectedItems (for multiple selection) https://msdn.microsoft.com/en-gb/library/system.windows.controls.listbox.selecteditems(v=vs.110).aspx ?

answered Feb 16, 2017 at 13:54

Artur Udod

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1 Comment

L. Zeda Over a year ago

Sure, I've tried all three. They will select item, but they won't highlight it. You apparently need .UpdateLayout() and most importantly .Focus() after that...

NullDev · Accepted Answer · 2017-02-16 13:56:09Z

0

To get the currently selected item use

ListBox.SelectedItems()

answered Feb 16, 2017 at 13:56

NullDev

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