解决方法
使用
SetSelected
并中间通过所有项目
// Loop through and set all to selected. for (int x = 0; x < listBox1.Items.Count; x++) { listBox1.SetSelected(x,true); }
要检查项目,请使用SetItemChecked
// Loop through and set all to checked. for (int x = 0; x < listBox1.Items.Count; x++) { listBox1.SetItemChecked(x,true); }