How do highlight one ListBox item?

Clyde Eisenbeis

2y729C#

Using c-sharpcorner.com/UploadFile/mahesh/listbox-in-C-Sharp/ > "C# ListBox Selection Mode and Selecting Items" >

listBox1.SelectionMode = SelectionMode.MultiSimple;  
listBox1.SetSelected(1, true);  
listBox1.SetSelected(2, true);

Resuts in error messages

'SelectionMode' does not contain a definition for 'MultiSimple'
ListBox' does not contain a definition for 'SetSelected'

How do I highlight one ListBox item? See snipboard.io/F2wAt5.jpg.

2 Replies

Know the answer? Post it — somebody with the same question will find it here.

Tuhin Paul2y ago
Accepted answer
```
// Clear any previous selections
listBox1.ClearSelected();

// Set the index of the item you want to highlight
int indexToHighlight = 1; // Index of the item you want to highlight
listBox1.SelectedIndex = indexToHighlight;
```
This code will clear any existing selections in the ListBox and then highlight the item at the specified index (in this case, index 1). Remember that indexing in C# starts from 0, so if you want to highlight the first item, you would use index 0.

If you're looking to allow multiple selections, then you would indeed set the SelectionMode property, but the correct value is SelectionMode.MultiSimple, not MultiSimple.
Tuhin Paul2y ago
To highlight a single item in a ListBox in C#, you don't need to set the SelectionMode property. Instead, you can manipulate the SelectedIndex property to achieve what you want.