If you enter something in the ComboBox that is Posted: 1 week ago Edit. Value Property. You can also use the ComboBoxEdit. SelectedItem property to do the same. Additionally, EditValue allows you to specify a custom editor value. Assembly : DevExpress.
Posted: 1 week ago So if you have a property call MyProperty, then the ComboBox would show the current value. You can then provide a list of possible "standard" values to choose from, which can be displayed by the ComboBox. So ultimately, you change the selected item of the ComboBox by changing the associated property.
Tables 0. InsertAt ds. Just copy your dataset to a dummy datatable and use that to bind to your combobox. Then the selectedvalue will accept the second row! DropDownList my problem is, i wanna set default value to that combo using combobox. The issue is that the combo will show blank, instead of showing the correct item. If you click the dropdown, the correct item is in the list and can be selected by the user.
But it should already be showing. Pick table 1 in the listbox on the left and notice how Field 3 is selected in the combobox. Now, select table 2 in the listbox and Field 3 will be selected in the combobox.
Select, table 1 in the listbox again and notice that nothing is selected in the combobox! NET con Visual Studio. Vamos a crear un proyecto de Windows Forms y agregaremos el componente ComboBox es el que se muestra en la imagen.
DataGridRow object for each data object in its Item collection and a System. DataGridCell for each cell of each row.. No - I should have mentioned that, but the only information on the call stack is the current call setting the property to null, and [External Code]. Do you think this has got something to do with an event that is raised when you switch tabs? I mean, the event could tunnel down to the ComboBox that triggers the change of the SelectedItem?
Show 2 more comments. Active Oldest Votes. Improve this answer. Holger Adam Holger Adam 12 12 silver badges 16 16 bronze badges. Even though the link doesn't work, the suggested change DOES solve the problem. This only seems to fix the problem some of the time — Matthew Finlay. You helped me, but in my case it was reverse. I have put SelectedItem and then ItemsSource.
I think this worked in my case becasue my view is always alive but its DataContext changes. So everytime new context is set SelectedItem in that view is set to null. I hope it makes sense, and if it does not, just give it a try; it might for you too.
Add a comment. This enables animation, styling, binding, etc RemovedItems[0]; if selector. Hope that helps. Happy conding! Conding went very nice. Thanks for solution. Peter H Peter H 11 2 2 bronze badges. MyItem; if i. Community Bot 1 1 1 silver badge. But here is an ugly hack that seems to work: First, give your ComboBox an x:Name. Controls; using System.
Windows; namespace SATS. So everytime you want to remove the datacontext from the combobox, the old datacontext will be set again. Everytime you change the active Tab of your TabControl, the Combobox will removed from your VisualTree and added if you go back to the one with your combobox. If the combo box is removed from the VisualTree, also the DataContext is set to null. I think the problem may be that you arent telling the Combo box when to bind back to the source.
Try this:. I had this same problem when scrolling through a virtualizing DataGrid that contains ComboBox es. But here is an ugly hack that seems to work:. First, give your ComboBox an x:Name. For example:. Question I've got a simple problem in my WPF application which has me banging my head on the table. Edit: The call stack at the setter breakpoint only shows [External Code] - no hints there.
No correct solution. This enables animation, styling, binding, etc RemovedItems[0]; if selector. Hope that helps. Vladi Telerik team. Hello, We are not sure what the issue exactly is. The previously discussed issues is related to when the ItemsSource of the control is changed which causes the SelectedItem to be reset. That issue is resolved by overriding the Equals of the bound objects to the RadComboBox control.
I created and attached a sample project for you that shows the mentioned approach. In the project if you click the change button the SelectedItem Item 1 will not be reset. If this is not the case could you open a support ticket and send us a sample project that recreated the issue so that we can observe it on our side and see what could be the cause of it? Regards, Vladi Telerik. Learn what features your users use or don't use in your application.
Know your audience. Target it better. Develop wisely. Justin Top achievements Rank 1. It shows up in the routed event information in the SelectionChangedEventArgs
0コメント