How to focus the mouse pointer to the first item in checklistbox using c#.net

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Thanks in advance....While I am click the button automatically the mouse pointer went to the 1st item in checklistbox and focus it using c#.net

What I have tried:

chkLBDestinationFolder.SelectedIndex = 0;

not get works

Posted 24-Feb-21 19:23pm

Member 15028582

Updated 26-Feb-21 5:48am

v3

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Member 15028582 25-Feb-21 2:01am

I got a output....

chkLBDestinationFolder.TopIndex = 0;

But is this a correct code....

[no name] 26-Feb-21 15:12pm

It's a contest between "move mouse", "select an item", or both.

2 solutions

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Ralf Meier · Answer 1 · 2021-02-25T07:11:00

Solution 1

try it with :

VB

CheckedListBox1.SelectedItem = CheckedListBox1.Items(yourIndex)

... but the CheckedListBox1.SelectedIndex must also work in the same way ...

Posted 25-Feb-21 7:11am

Ralf Meier

Updated 25-Feb-21 7:13am

v2

Alan N · Answer 2 · 2021-02-26T05:48:00

Is this what you wanted? I basically just followed the instructions in your question!

C#

private void Button_Click(Object sender, EventArgs e) {
  Int32 index = 0;  // or any other valid index
  // select an item, scroll into view
  clbx.SelectedIndex = index;
  clbx.Focus();
  // move the mouse cursor
  Rectangle r = clbx.GetItemRectangle(clbx.SelectedIndex);
  Point newPointerPosition = clbx.PointToScreen(r.Location);  // top left corner of the item
  newPointerPosition.Offset(r.Width / 2, r.Height / 2);       // centre of the item
  Cursor.Position = newPointerPosition;
}