Does anyone know how to drop down the AutoCompleteBox to see all the values without guessing at an entry and starting typing.
I know I could use a ComboBox but on a data entry form where a user needs to enter lots of information it is preferable for the user to pick up the mouse as little as possible and so therefore I wanted to use the AutoCompleteBox. However, in smaller lists it is also useful to quickly be reminded of the choices which you could do in a combo with the up/down arrow.
I have seen some examples of combining the two controls' functionality into one and I may go this way but wondered if there is a simpler way.
When I did this I had an autocomplete box on top of a combobox that were both bound to the same value, with the autocomplete box having a larger right margin so you could see the combobox arrow. Then I created a got focus event that opens the list of results and I set the MinimumPrefixLength to 0 so it would search with nothing typed in.
XAML
<sdk:AutoCompleteBox IsTextCompletionEnabled="True" MinimumPrefixLength="0" GotFocus="AutoComplete_GotFocus" />
Code Behind
private void AutoComplete_GotFocus(object sender, RoutedEventArgs e)
{
AutoCompleteBox box = (AutoCompleteBox)sender;
box.IsDropDownOpen = true;
}
Related
I have a textbox and some labels inside the data template of bounded listbox.
When I click on any label the whole item is highlighted in blue, but when I click directly on a different textbox the selection does not change.
Is there a way to make the selection of the listbox change even when a textbox is clicked?
thanks
This is what I've exactly asked few days ago, see post: "WPF: Trigger SelectedIndex changed whilst clicking on any control within a ListBoxItem area"
basically there are few solutions, using code behind and XAML, but I've not verified latter approach yet
The reason is because the TextBox handles the click event in order to receive focus. There are a number of ways to handle this, including but not limited to:
stop the TextBox handling mouse events (which prevents the user from focussing it using the mouse)
use an eventhandler when the TextBox gains focus (or PreviewClick or similar), to select the parent ListItem
I have an autocompletebox that works but for one oddity I was hoping for help with. When selecting an item in the popup, using the keyboard to arrow down and then selecting it using either the enter key or with the mouse, the item is selected and updated into the autocompletebox. However, if one instead of arrowing down to the item simply hovers over it instead and select it with the mouse, the selecteditem is set correctly but the autocompletebox doesn't get updated with the selecteditem.
That is, arrow down and select an item and the autocompletebox reflects the selected item whereas just hovering over and selecting the item means the autocompletebox does not reflect the selection - instead it shows what the user typed into the box; note that the backing property is aware of the selected item so it does work either way, only it's not reflected in the textbox.
Any help is appreciated.
Thanks
I should add that it is OnSelectedItemChanged that doesn't seem to get called...
This issue is explained here: http://www.siimviikman.com/2012/05/30/wpf-autocompleteboxfiltering-similar-items/
As precised in the end of the article, the user cannot navigate through items (with arrow keys + hit TAB). That is why I could not use their solution.
In the WPF Toolkit source code (UpdateTextCompletion method), one can read:
// Perform an exact string lookup for the text. This is a
// design change from the original Toolkit release when the
// IsTextCompletionEnabled property behaved just like the
// WPF ComboBox's IsTextSearchEnabled property.
//
// This change provides the behavior that most people expect
// to find: a lookup for the value is always performed.
newSelectedItem = TryGetMatch(text, _view, AutoCompleteSearch.GetFilter(AutoCompleteFilterMode.EqualsCaseSensitive));
So I simply patched the WPF Toolkit and commented out the calls to UpdateTextCompletion method, both in OnAdapterSelectionComplete and OnAdapterSelectionCanceled.
As I don't use text completion, this fix seems to work fine.
I'm trying to achive displaying the RowDetailsTemplate of a Silverlight DataGrid depending on a bool Property, bound to a CheckBox Control's IsChecked Property. Insinde of my RowDetailsTemplate there is a single custom UserControl, containing further Controls.
Since the DataGrid only allows a global setting (RowDetailsVisibilityMode) Some code-behind is needed. I've implemented a solution based on Rorys Reply (and using a behaviour-technique) which actually works.
Unfortunately, The DataGrid doesn't remember the individually shown or hidden Rows on sorting. The checkbox remains selected, but the Row collapses. Further, no event like "OnAfterSort" or something similar seems to exist, where i could "Refresh" the visibility settings in a loop.
Another idea was to bind the Visibility of my custom Details-UserControl to the CheckBox bound value. This actually works (when settings RowDetailsVisibilityMode to "Visible"), but I'm not able to get rid of this weird behaviour: When the CheckBox is checked, the Detail Template expands and the detail UserControl appears. Nice. When the CheckBox is unchecked again, the UserControl disappears (Visibility is set to Collapsed) but the Row doesn't collapse and the blank space remains (as it would be set to Hidden not Collapsed).
Do you have any ideas?
I hope it's ok I didn't post any code samples, the implementation is pretty easy and I believe that the problem doesn't actually lie in a coding mistake i made. You can setup a simple DataGrid quickly like in this perfect MSDN Example. Starting from here, it's easy to test both described behaviours!
Really big thanks in advance,
- Thomas
We are using WPF and have a window derived from a DockingLibrary. This window has a grid with multiple items in it, one being a WPF datagrid. We are using the M-V-VM pattern. When this windown is created and shown, none of the rows in this datagrid are selected. We can set the row to display as highlighted by doing something like:
SharedWindow.ShipmentWin.shipmentDataGrid.SelectedIndex = 0;
This causes the first row in the datagrid to be shown as highlighted. But, and isn't there always one of these, this row is not Selected nor does it have Focus. I tried setting IsSelected and Focus on this row as in:
SharedWindow.ShipmentWin.ShipVM.IsSelected = true;
bool focused = SharedWindow.ShipmentWin.shipmentDataGrid.Focus();
Am I going about this all wrong and is there some other way to Select the first row in the datagrid and set focus to it? Typically, when a datagrid is created, no row is selected until the user mouse clicks on the desired row.
Any thoughts would be greatly appreciated.
thanks!
Have a look at the FocusManager. It allows you the set the focus to another UI element via the SetFocusedElement method. Additionally, it allows you to determine the currently focused element in your application which is can get handy to debug focus issues. Snoop can be useful, too. It shows the currently focused element in the bottom status bar.
If you use the DataGrid from the WPF Toolkit, be prepared to find some bugs in relation to focus handling. Some have been addressed recently.
It's also worth understanding the difference between logical focus and keyboard focus, which are quite different animals. The .Focus() method sometimes only sets logical focus - which probably isn't what you want.
The documentation for the Focus method tells you that it will return true if the keyboard focus was set, and false otherwise.
I am displaying Mac Address in a WPF application.
I want that mac address to be selectable to be copy/paste, so I am using ReadOnly TextBox
When the user double click I want to select the whole MacAddress
The default behavior by the WPF and Windows, is by double click select part of the number between colons
so when the mac address is : 00:55:66:77:99
and the user double click, only one part of the mac address (like 55) being selected
Is there a way without a code to make the selection for the whole content for textbox
or maybe I should not use textbox?
Thanks
On MouseDoubleClick event of textbox you can call SelectAll() method of textbox to select al the text inside it.
void textBox_MouseDoubleClick(object sender, MouseButtonEventArgs e)
{
(sender as TextBox).SelectAll();
}
Unfortunately, I don't think there is a way to do this directly in a TextBox.
That being said, it would be trivial to add this behavior to a text box via an Attached Property or an Expression Behavior (my preference). Just watch for selection changed, and if there is anything selected, select everything. Then you could reuse this easily in other places, without adding code to your code behind files. You're still adding code, but not in the actual UserControl or Window class, but rather in a reusable component that will just be inserted into the xaml.
Can't you just handle the MouseDoubleClick event? Otherwise if you wanted to always prevent partial selection, you could handle the SelectionChanged event. In either case you can use the SelectAll method.
Nevermind I re-read and saw you want a non-code solution. Unfortunately I know of none.
I loved the idea of behavior, but I had to redistribute some Blend-related assembly, and I don't know Blend yet.
So I end up creating a new type of textbox, that inherit from textbox, and does selectAll when mousedoubleclick
Thanks for all the answers