MultiColumn Combo Box Problems

4 posts, 0 answers
  1. Barry
    Barry avatar
    18 posts
    Member since:
    Jul 2008

    Posted 14 Jan 2009 Link to this post

    I have a few issues with the MultiColumn Comb box:

    1) If a unique item is selected in the combo box and drop down list is not currently displayed. When the user clicks on down arrow to disiplay the drop drop down list then the length of the displayed list is automatically adjusted to only display one line (the selected row in the drop down list). However if the display width of the drop down is less than the witdth of the table being displayed then a horizontal scroll bar is displayedin the drop down which hides the selected row ( the height of the drop down list is not adjusted for the presence of the horizontal scroll bar).

    1a) A related problem with collapsing the height of the drop down list to the selected elements is that if you then use the back arrow to remove text form the text area then the height does not expand again as more entries are displayed in the drop down list (until the list is closed and reopened, or the user drags the list to make it bigger).

    2) Filtering (using the RadControls Demos). If filtering is turned on, and you type in the letter 'a' then the combo box's filtering works as expected, however if the letter 'n' is now typed in (after the 'a') the combo box automatically selects the entry "ANATR" - the first match for "AN", preventing the user form being able to select another entry that starts with "AN". The same thing happens if the drop down list is not displayed. If you click on the text box section to the right of the higlighted text 'ANATR' and then use the back arrow 5 times to delete the contents of the text box and then start typing the 'AN' again the problems presists. However while 'ANATR' is dispalyed and highlighted if you click on the highlighted text and type a character the contents of the text box is cleared (the character just typed is not displayed). Now if you start typing again the multiColumn combo box behaves as expected.
  2. Martin Vasilev
    Admin
    Martin Vasilev avatar
    1061 posts

    Posted 19 Jan 2009 Link to this post

    Hello Barry,

    Thank you for writing.

    Please find the answers to your questions in the same order:

    1) I have not managed to reproduce the described behavior. Please send me more details about your scenario. Or even better, could you please send me a small example application that demonstrates it. This will help me investigate the issue and address it in the future versions. Currently, you can try to avoid the DropDown size problems by setting explicitly min size. Please review the code-block below:

    this.radMultiColumnComboBox1.MultiColumnComboBoxElement.DropDownSizingMode =   
        Telerik.WinControls.UI.SizingMode.UpDownAndRightBottom;  
    this.radMultiColumnComboBox1.MultiColumnComboBoxElement.DropDownMinSize = new Size(0, 300); 

    2) I confirm that the described behavior is not very convenient. We will improve it in the future versions of RadMultiColumnComboBox control. I have update your Telerik points for bringing our attention to this.

    If you have other questions, do not hesitate to contact me again.

    All the best,
    Martin Vasilev
    the Telerik team

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  3. UI for WinForms is Visual Studio 2017 Ready
  4. Zensell
    Zensell avatar
    12 posts
    Member since:
    Jul 2009

    Posted 11 Sep 2009 Link to this post

    Hi, the problem described in 2) is still happening with Q2 2009 SP1. Is there a workaround for this?
  5. Nick
    Admin
    Nick avatar
    767 posts

    Posted 11 Sep 2009 Link to this post

    Hello Zensell,

    Unfortunately there is no work-around since the behavior is internal to the control. Please excuse us for the introduced inconvenience.

    Do not hesitate to write us back if you have further questions.

    Sincerely yours,
    Nick
    the Telerik team

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