I'm wondering if I can make fake sections in the popup menu:
The rule would be, if the 5th character of the displayed item is different from the 5th char of the previous item in the menu, it has to be highlighted
What do you think?
Thanks!
To achieve this would be a hack.
Normally the items that appear in the popup part of a combo box will be an instantiated data template, and each gets its own data item and has no clue or knowledge of the other items in the list, so you couldn't use a converter or anything else to achieve this behavior.
What you could do though is inject (attach) your own control into the popup part of the combo box, and take over the rendering of the data items. How you do this will depend upon which combo box you are using (i.e. MS or some other vendor's) and would be a whole new question.
Would that be easier if I were to create my own combobox as follow:
a TextBox associated with a Button that when pushed would popup a datagrid in which I could implement this conditional formatting?
Related
I have a VB6 application that has been running for quite sometime. Currently I'm trying to update one of the form that has a combobox 2.0. Because the combobox is populated with hundreds of items - I'm trying to update it so that users are able to click on a look up button next to it, where another window opens up with all the items from the combobox. User will be able to search by keyword and/or select an item and double click on it and have it appear in the combobox. The issue I'm having is with trying to pass no value or "" when CANCEL is clicked. I'm able to pass the value if I in the properties window my STYLE Is set to COMBO rather than list. However, the issue I come across is that with COMBO the value (text) in the combobox sometimes is not aligned properly. Is there a way to pass a "" value to a combobox 2.0 without changing the style to COMBO?
If they hit cancel set the ListIndex of your combo to -1 rather than setting the text property. This is the value for no item being selected.
I have a ComboBox implemented with an auto-completion system. My ComboBox contains more than 100 items. When users are typing text in, the auto-completion system opens the dropdown list and highlights the most relevant item. Moreover, when the dropdown list is expanded, all items are available (no filters). But the most relevant item is always at the bottom of the dropdown list.
I would like it to be in the middle, if possible. One item can have the same reference but another type than another one, that's why I need to see most of them in my dropdown by placing them in the middle.
Any idea ? It's not really important but kind of useful for them. Thanks !
Update :
Here's my ComboBox with the open dropdown. Sorry about that, I had to blur its elements. As you can see, the user starts writting the reference in the ComboBox. The autocompletion works fine, but the corresponding item is found at the end of the dropdown list (in the red frame), almost out of bounds.
I wish it would be highlighted in the middle of my dropdown list instead of so far below.
Your item search may work well, but your list isn't visually filtered, which means it's size always remains the same.
It's scrolled into view, by the wpf system, but still displaying all other items around the relevant one. The reason why it's at the bottom is because wpf Scrollviewer just finished scrolling the item into view and sees no need to scroll it further into the middle.
You could use the CollectionViewSource class. Why ?
It's simple to use, will keep your viewmodel data as it is, and you would have your relevant completion item at the top. It can be obtained by GetDefaultView(..)
Let's say you have a viewmodel flag "IsHidden", stating that it's content does not match the user input:
ICollectionView cv= CollectionViewSource.GetDefaultView(myComboBox.ItemsSource);
// switch filter on
cv.Filter = obj => (obj as myViewModel).IsHidden == false;
// switch off
cv.Filter = null
I have been searching for a while now, and have not been able to find a load-on-demand combo box that populates itself depending on what is typed in the combo-box.
I also have a requirement that an item in the list must be selected (i.e.: free text can be entered but not "selected" - only a "search result" can be selected from the list in the combo box.
The scenario is as follows : there is a text box/combo box where someone enter the first 2 or 3 characters, a web service is called which queries a database and then populates the combo box.
Are there any controls or code example that anyone knows of? Or alternatively another way to implement this?
Here is a link to an asp.net control that has this functionality:
http://demos.telerik.com/aspnet-ajax/combobox/examples/populatingwithdata/autocompletesql/defaultcs.aspx
use the event "textchanged" to dynamicly add/remove items :)
updated :
why not bind the results to observable collection and databind that to the combo box , so on chnage > query database > bind items to the collection , .net automatilcy updates the items , this might work :)
Telerik combobox with autocomplete will be what you are looking for.
I need to place a ComboBox in a place where I have very limited space. Is there any way to show content for the SelectedItem in the ComboBox that is different than the content that is displayed for the item in the ComboBox's Popup?
As an example, Firefox does this with it's Site Search box in the top right of the browser. When you open the dropdown, the site names are displayed along with their respective logos, but when a site is selected, only the icon is displayed.
UPDATE: Solution found :-)
I found a solution at this site:
http://blogs.windowsclient.net/airborneengineer/archive/2009/06/25/wpf-styles-and-templates-part-ii-combobox-customization.aspx
I just needed to modify the "DisplayImageWithText" DataTemplate to only show the field I want.
Yes, have 2 sets of data and change the display member column of the combobox - according to the position. as long as the value is the same, it will work good, and you'll get 2 displays out of the same combo-box.
I am using Silverlight with Telerik Controls.
There is one scenarios where i stuck with it.
1) I have added Tab control into page(XAML page) with two tab Items.
2) I have also added stack panels into both tab items to dynamically add controls into respective stack panels.
3) Then Dynamically added combo boxes into stack panel and these combo boxes are binding with datasource.
4) I am giving bydefault selection functionality for combo by coding, if label name and values of the datasource matching then it will bydefault select perticular item.
5) And finally when i click on the Map button then it will give me two objects with selected comboxes list with respective tabs.
6) When i directly click on the Map buttom then it is giving me proper result.
7) But i did some changes like select some of combo boxes and remove selection from combo boxes then it is givng me correct result of currently selected tab Item. and another tab item shows with zero selction.
8) In this case, i am not able to find controls from another tab.
Can anyone plz help me for a correct way...
Thanks....
Have you posted this to the community forum or posted a support ticket concerning the issue you are having? If possible, please submit a support ticket or post to the forum with the code showing what you are working on so we can look a bit more into the issues you are having.
Thanks!
Evan