DropDownList not consistently showing the list window

2 posts, 0 answers
  1. Francisco
    Francisco avatar
    17 posts
    Member since:
    Mar 2016

    Posted 20 Sep 2016 Link to this post

    Hello Support,

      I am using Telerik for Winforms version 2015.2.728.40.  We are testing our application using Remote Desktop Services in Windows Server 2012.  We are experiencing an issue with all the drop downs in that the drop down window does not consistently show. Most times, the display window for the drop down lists are truncated, even though the items are still selectable.

    I created a sample application with one form and one dropdownlist and was able to reproduce this behavior with Telerik version 2015.2.728.40.

    I updated the sample to version 2016.2.608.40 and only saw the issue once.

    I'm wondering if there is anything I can do to make the dropdownlist list show correctly with version 2015.2.728.40?




  2. Hristo
    Hristo avatar
    1522 posts

    Posted 21 Sep 2016 Link to this post

    Hello Francisco,

    Thank you for writing.

    We had an issue introduced in the 2015.2.623 release which is already fixed. The drop-down is displayed via an animation and in a remote desktop environment in certain cases, the animation could not complete. As a workaround I can suggest disabling the animations: 
    this.radDropDownList1.DropDownAnimationEnabled = false;

    In case you are also testing with the latest version and the popups are continuously shown cut off please send me your application so that I can investigate it.

    I hope this helps. Should you have further questions please do not hesitate to write back.

    Hristo Merdjanov
    Telerik by Progress
    Check out the Windows Forms project converter, which aids the conversion process from standard Windows Forms applications written in C# or VB to Telerik UI for WinForms. For more information check out this blog post and share your thoughts.
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