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Unplanned
Last Updated: 02 Jun 2026 12:04 by ADMIN
Gemma
Created on: 02 Jun 2026 11:55
Category: DropDownList
Type: Bug Report
4
DropDownList: Pop-up height incorrect on first time opening when screen scaled on high dpi

On 125% dpi:

 However, if you close the list and open it again, the list has the correct height (the gap is gone).

1 comment
ADMIN
Nadya | Tech Support Engineer
Posted on: 02 Jun 2026 12:04

Hi, Gemma,

Thank you for reporting this issue.

Possible workaround:

protected override void OnShown(EventArgs e)
{
    //workaround for the issue with the popup height when the form is shown for the first time
    base.OnShown(e);

    this.radDropDownList1.DropDownListElement.ShowPopup();
    this.radDropDownList1.DropDownListElement.Popup.Visible = false;
    this.radDropDownList1.DropDownListElement.ClosePopup();
}

Regards,
Nadya | Tech Support Engineer
Progress Telerik

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