How to delete multiple items selected by the ListBox control (c #, classic)

By default, The ListBox control can only be selected. To select multiple items, you must set the SelectionMode attribute to SelectionMode. MultiSimple.

How can I capture this information if I want to delete multiple items selected by ListBox or perform other operations?

Private void button_deleteSelected_Click (object sender, EventArgs e)

{

ListBox. SelectedIndexCollection sic = listBox_demo.SelectedIndices; // obtain the subscript of the selected Item

If (sic. Count = 0)

Return;

Else

{

// Put the selected Item in the list

List <int> list = new List <int> ();

For (int I = 0; I <sic. Count; I ++)

{

List. Add (sic [I]);

}

List. Sort (); // Sort the list (the default sorting result in the library generally refers to sorting from bottom to big)

While (list. Count! = 0) // Delete the selected Item from The ListBox control in the ascending order of the subscript

// If other sequence is used here, the validity of the lower mark may be damaged.

{

ListBox_demo.Items.RemoveAt (list [list. Count-1]);

List. RemoveAt (list. Count-1 );

}

}

}

One method is simpler:

While (listBox1.SelectedItems. Count! = 0)
{

ListBox1.Items. RemoveAt (listBox1.SelectedIndices [0]);
}

 

While (listBox1.SelectedItems. Count! = 0)
{

ListBox1.Items. RemoveAt (listBox1.SelectedIndices [0]);
}