Wpf combobox not showing items. I have a usercontrol with an listview and some controls.
Wpf combobox not showing items I can use the arrows to navigate between the different values. Feb 14, 2021 · Hi, I have problems getting the combobox to work. Everything works fine, when not using the combobox. From that Discover the common issue behind why ComboBox items aren't displaying in your C# WPF MVVM applications, and learn how to fix it effectively. Each time I click on one row in the ListView it should show in the controls (textboxes, labels and so on). Oct 24, 2013 · Now I will show you the two cases : Case 1: Works Well <ComboBox x:Name="cbUnder" ItemsSource="{Binding Path=GroupName}" IsEditable="True" Grid. ColumnSpan="4" Grid. I then set the selected item to previously added value (using the Text property). May 23, 2012 · I am having a problem getting the WPF combobox to display the drop down portion. Apr 1, 2021 · 3 - To allow adding new WPF window from Visual Studio, open the csproj with a text editor and change ProjectTypeGuids tag to include : {60dc8134-eba5-43b8-bcc9-bb4bc16c2548}. The object is returning the correct object via the get in the property though. Aug 3, 2011 · Not sure why your code isn't working - I tried it and it works just fine. I set debug point in ComboBox_Loaded function and from that, I have seen that the last 3 lines are skipped by the compiler. It is working fine on visual studio 2015 . The order of setting Items and SelectedItem should not matter. The list in the listview is Jan 11, 2005 · I have a combobox set to list (that means it acts as only a dropdown, not an edit control), and I have added 3 items to it, but when I click the combo box to show the drop down list, all I see is a small black line appear right below the combo box, and no list! Nov 2, 2016 · ComboBox in readonly mode does not support displaying items that does not exist in the ItemSource, but if you are ready for small trade of, you can achieve something similar. The dropdown list text is visible, yet it doesn't show the selected item. Count-1 so that the newly added item appears in the ComboBox as the selected item. Screenshots If applicable, add screenshots to help explain your problem. the combobox for the SelectedRol correctly displays the property when the property gets a new value (from a selectionChanged event in a listbox) However, with almost exactly the same code, the SelectedPSoort combobox never displays anything. 5 - Create a new WPF window and add to it a combobox with items in it. Output does not indicate any binding problems, I have also set up a TextBlock with the same binding to see if it works - and it does. Count - 1; The SelectedIndex property is set to Items. 4 - Add System. Insert(0, "Please select any value"); and add all the items to the combobox after the first index. Thank you very much! Public Class Form1 Private Sub… -However, form two also has Comboboxes for Status, JobTitle, and Department. Selecting a new value for these items does update the value in form one as intended. When the button is pressed, the ComboBox must be shown and be ready to select an item from its list. Add("SomeText"); comboBox1. The code given usually looks something like this: The problem is simple: By default WPF compares SelectedItem to each item in the ItemsSource by reference, meaning that unless the SelectedItem points to the same item in memory as the… May 13, 2022 · The following seems well-coded, but don't why it didn't work. If you skip the Value, then I think it's quite simple to add a new item into a ComboBox during runtime. My styling is perfect but the combobox doesn't show the selected item in the main bar (as you can see in the image I have embedded). I would suggest a DataGridTemplateColumn with the CellTemplate a standard ComboBox with binding for the collection of items to choose from and the Jun 21, 2017 · My combo box item is not showing. Oct 3, 2014 · If not you need to tell the View what DataContext to use, below is a quick example of a WPF window, and setting the xamls DataContext to the code behind of the View. . ---This video is Remember to chose the select index in xaml or in the windows load first. Column="1" Grid. comboBox1. -When I set the CB's binding mode to 1-way, the initial value appears, but of course the updating does not Sep 11, 2014 · If the item that is selected is not the same instance that is contained in the List, you must override Equals() in the CustomObject to let the ComboBox know that it is the same object. If it's the same instance, maybe it's only a simple thing such as setting the BindingMode to TwoWay: SelectedItem="{Binding Path=CustomSettingProperty,Mode=TwoWay}" Jul 10, 2023 · All that is except for the FIRST time that first combobox is selected and a value is chosen. But when I try this in visual studio 2013, it is showing nothing. Jun 11, 2009 · How do I get the Selected Item to show its text in my WPF combo box when selected? Above is an option dialog that allows users to select and configure the available tournament displays. Expected behavior The ComboBox should show the SelectedItem; i. I find that DataGridComboBoxColumn is difficult to work with. Clean the solution, close it and reopen it. Windows. Xaml in references of the project. There is probably an item in Repository. The selected item is not working on initial startup, but then it works OK. Models that has the same name and has identical Properties, but it is not the same actual instance of the Model class. Apr 6, 2018 · I've been tinkering around with this one for a while and can't seem to find the problem. How can the ComboBox drop down list be forced to show Nov 9, 2011 · Use the insert method of the combobox to insert the "Please select item" in to 0 index, comboBox1. No matter which way I configure this when I come back to the page and the object is reassembled the ComboBox will not select the value. e. My XAML looks like this: Jul 2, 2012 · Thanks for the help. "hello", as this was already set when the bound items property was changed. Sep 11, 2014 · A ComboBox with the ItemsSource linked to the Controls property: <ComboBox ItemsSource="{Binding Path=Controls}" SelectedItem="{Binding Path=SelectedControl}" DisplayMemberPath="HeaderTitle" > The problem is that the ComboBox shows the items correctly but when I select an Item it doesn't appear in the ComboBox. SelectedIndex = comboBox1. Row="3" /> In the above case I get all the group names from my database and are displayed correctly as items of the comboBox. Sorry. I guess I am missing something in the binding? Jun 23, 2015 · Using a combination of the @Erik83 and @Xavier solution I still had the problem that selecting a ComboBoxItem in a location right from the CheckBox text closes the ComboBox-DropDown and shows the ToString() value of the ComboBoxItem as the CheckBox is not stretched to DropDown-Width. The problem is the selected combo box item shows the UserControl instead of the Display name. ComboBoxItem' instead of an item (which is my color name here) when I chose an item from ComboBox. Jul 15, 2015 · I'm trying to construct a ComboBox that will display a selected item. Thanks in advance. Since that exact object is not in that list, it selects nothing. The project runs successfully, yet no item displays, clicking the combobox dropdown arrow. However, below is some more straightforward code which also works - you may find that doing it this way instead makes your problem go away. Controls. Items. I have a usercontrol with an listview and some controls. The combobox renders but when I click the down arrow the values in the combobox don't display. If you implement INotifyPropertyChanged on ChangeTitle and add a boolean property similar to IsAvailable , and then instead of removing items from the collection Oct 3, 2021 · In the DataGridComboBoxColumn you need to indicate the collection that populates the ComboBox and the Selected item in the collection. I'm not sure if this is just an issue with the way the ComboBox and MVVM pattern works. I have a ComboBox of Colors in it. Please, help check the problem. And here's a xaml code for a ComboBox: All that is except for the FIRST time that first combobox is selected and a value is chosen. The selected item refers to a value being pulled from a database. Nov 20, 2015 · I have a combobox with two bindings set up - one for ItemsSource and another for SelectedItem. Sep 28, 2022 · Run the repo, the ComboBox is displayed with an empty selection. It's useful when you bind your combo Box to a DB and in the window load page set conditionally to some index and repeat it in load event so the result is you see your selection in window load and do not need to click the combo box to see visual update of it's selection change. From that Oct 11, 2019 · I have a Button and a hidden WPF ComboBox. But this is not what I want. The text box binding we are doing works Jun 2, 2016 · The ComboBox gets the value of SelectedModel from the binding, and tries to find that exact object in its list of Items. However, the initial value in the CBs is not set the way it is with the TBs. I can get the combo box to display the options easily enough, but getting the selected item to display is not working. I know that the set method is working because I can successfully store the user's choice. I ended up using a completely different approach by adding the items to the combo-box one by one. The other 4 boxes DO NOT redraw to indicate the newly selected item. Went about too quickly. Why? Jul 10, 2014 · I have created WPF application. How can I solve it for Visual Studio 2013. Here's the code Jul 26, 2016 · When I attempt to use a ComboBox inside a DataGrid, I am not seeing any of the items from the list which is used to populate the ComboBox. On Window Loaded: That didn't help, let me also clarify that, the combo box is working and it is sucessfully binding the values to the data context, only problem is it is not displaying the text for its currently selected value, just a blank cell. BUT each of the combobox's ARE set to the right SelectedItem as once you click on it it jumps RIGHT to the item in the dropdown list and poof fills out the text display. I want selected color to be as my ComboBoxItem, but it's showing 'System. Also its recommended to use ObservableCollection<T> when binding collections as adding and removing items will update the ComboBox automatically Aug 20, 2011 · I see a lot of posts on StackOverflow about WPF ComboBoxes not displaying the SelectedItem correctly. A similar implementation works, when I use a StackPanel rather than a DataGrid. mehniccjmkelsyxbrnnzytnrczfltwkxydbdywgpwbtvhhgznnucajpcbzqegxvsvpfuohvcajxjrputlionzvg