This is what the code of my ComboBox looks like: In my C# code, I always used to set the default value of the ComboBox like this: Is it possible to do the same thing in my XAML code? Light bulb as limit, to what is current limited to? Hi Rajni, Thanks for your response. . By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Listing 1 code example creates a ComboBox control and sets the name, height and width of a ComboBox control. How can you prove that a certain file was downloaded from a certain website? Can a signed raw transaction's locktime be changed? To learn more, see our tips on writing great answers. We recommend you to execute the above example code and experiment with some other properties and events. This article demonstrates how to create and use a ComboBox using XAML. (Inherited from Control), Called before the LostFocus event occurs. (Inherited from Control), Gets or sets the style in which the text is rendered. But as long as i can save that data to the "Person" column I am good with it. Not the answer you're looking for? Gets or sets a value indicating whether the user can interact with the control. Why do you use Tag instead of SelectedValue in your seond code example? Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. To learn more, see our tips on writing great answers. (Inherited from UIElement), Occurs when a UIElement loses focus. Learn more, Artificial Intelligence & Machine Learning Prime Pack. (Inherited from UIElement), Occurs when a drag-and-drop operation is ended. Here's my combobox (sorry for the long names): In my ViewModel I define the properties for GroupQuestionnaireCB and SelectedGroupQuestionaireCB. Stack Overflow for Teams is moving to its own domain! (Inherited from DependencyObject), Attaches a binding to a FrameworkElement, using the provided binding object. This tutorial and code examples demo how to use a combo box in a WPF app. Tag is just a simple object that is mostly used as a garbage bin for everything you want to associate with a control, it has no further purpose and is there for atleast the last 100years :D. If you want to have a default value selected you have to either say SelectedValue="CA" (where the Value of a ComboBoxItem must fit this value) - SelectedIndex=0 (where the index of a ComboBoxItem must fit this value) - or the best of them all you say SelectedItem=SomeCLRobject (where the item of a ComboBoxItem must fit this value). Let us know. Did Great Valley Products demonstrate full motion video on an Amiga streaming from a SCSI hard disk in 1990? (ComboBox1.Items.IndexOf(ComboBox1.SelectedItem)); ComboBox1.ItemsSource=LoadComboBoxData(); ComboBoxItemcbi=(ComboBoxItem)ComboBox1.SelectedItem; val=ComboBox1.SelectedValue.ToString(). It is of tye GroupQUestionnaire, which I have defined in my Model. (Inherited from FrameworkElement). (Inherited from Control), Occurs when a keyboard key is pressed while the UIElement has focus. It either displays the current selection or is empty if there is no selected item. DevExpress engineers feature-complete Presentation Controls, IDE Productivity Tools, Business Application Frameworks, and Reporting Systems for Visual Studio, Delphi, HTML5 or iOS & Android development. How to read from path in wpf comboboxitem and write into path of binding. (Inherited from FrameworkElement, Gets or sets the vertical alignment characteristics that are applied to a FrameworkElement when it is composed in a parent object such as a panel or items control. The first combobox is a simple one and the second one is editable. Caution: This changes value shown in the combo box, but doesn't change the underlying bound value until the user actually changes the selection. Going from engineer to entrepreneur takes more than just good code (Ep. (Inherited from UIElement), Retrieves an object that has the specified identifier name. Solution 3. We put When the Littlewood-Richardson rule gives only irreducibles? I am having a lot of trouble gettingVidds's Occurs when the drop-down portion of the ComboBox opens. The only problem is that when the form is loaded, nothing is displayed on the surface of the Combobox to let the user know what value it contains. Then, I bind it like this: Binding on a combobox and setting default value, MVVM / ViewModel Pattern with Silverlight. Whether using WPF, ASP.NET, WinForms, HTML5 or Windows 10, DevExpress tools help you build and deliver your best in the shortest time possible. This property always returns false. What are some tips to improve this product photo? Why are there contradicting price diagrams for the same ETF? Occurs when the drop-down portion of the ComboBox closes. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. rev2022.11.7.43014. So it has no value shows. What the issue you are facing. What do you call an episode that is not closely related to the main plot? Goal is to obtain current ComboBox value. (Inherited from Control), Called before the DragLeave event occurs. suggestion to work: It seems he doesn't use the SelectedValue anywhere in the XAML. Instead of setting the Text property to make the default text show up at the beginning, you'd set the SelectedIndex to 0 in XAML, so that the first entry is selected when the form opens up. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. When a XAML processor creates the object tree from XAML markup, run-time code can refer to the XAMLdeclared object by this name. Why does sending via a UdpClient cause subsequent receiving to fail? @RandRandom I thought that it would take the tag from the scripts. By default, a combo box lets the user select from a pre-defined list of options. How to set the default ComboBox selection inside my XAML code? (Inherited from ItemsControl), Positions child objects and determines a size for a UIElement. The hierarchical inheritance of ComboBox class is as follows , Gets or sets a brush that provides the background of the control. All contents are copyright of their authors. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Does a creature's enters the battlefield ability trigger if the creature is exiled in response? Occurs when a UIElement receives focus. So far, so good. I can do the bind but cannot seem to set the default item. (Inherited from Control), Gets or sets the size of the text in this control. This custom UserControl will appear as a regular combobox, but unlike the built-in ComboBox object, it can show the user a default string of text if they have not made a selection yet. (Inherited from Control), Returns the local value of a dependency property, if a local value is set. Agree 2022 C# Corner. (Inherited from UIElement), Occurs when the IsEnabled property changes. A ComboBox represents a selection control that combines a non-editable textbox and a drop-down list box that allows users to select an item from a list. This tutorial and code examples demo how to use a combo box in a WPF app. To make a combo box editable, set the IsEditable property to . The code also sets the vertical and horizontal alignment of the ComboBox and sets the margin. Populating ComboBox inside ListView in WPF, WPF databinding colored items in a combobox, MVVM ComboBox SelectedIndex vs. SelectedItem, Substituting black beans for ground beef in a meat pie, Position where neither player can force an *exact* outcome. The combobox is bound to another Employee entity; the foreign key between the Task and Employee entities is an ID field. I can fill the combobox fine, but I want to have the first item automatically selected. I just assumed that the SelectedValue should be binded to the xaml, because in my case, setting the SelectedValue property to 1 in the constructor doesn't make much of a difference. I have added SelectedValuePath=" {Binding SiteSurveyModel.FuelType}" in the combo box. Many thanks for your comment, this did the job! The combo must know which property in the object to use to match when setting/retrieving its SelectedValue. (Inherited from Control), Gets or sets the border thickness of a control. (Inherited from Control), Returns the current effective value of a dependency property from a DependencyObject. Reset to default 2 As pointed out by ASh, you need to cast result like this: . (Inherited from UIElement). I don't know if I can set the Task class EmployeeID field so that the combobox would default to the first item on a New entity. When the migration is complete, you will access your Teams at stackoverflowteams.com, and they will no longer appear in the left sidebar on stackoverflow.com. What do you call a reply or comment that shows great quick wit? rev2022.11.7.43014. Teleportation without loss of consciousness. Public Shared ReadOnly InfoListProperty As DependencyProperty = DependencyProperty.Register ( "InfoList" , GetType (IEnumerable (Of Object )), GetType (StatusBar), New UIPropertyMetadata ()) Public Property InfoList () As . By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. (Inherited from Control), Called before the Drop event occurs. (Inherited from DependencyObject), Returns the index to the item that has the specified, generated container. What is the best way to give a C# auto-property an initial value? What are the rules around closing Catholic churches that are part of restructured parishes? Why? This is what the code of my ComboBox looks like: <ComboBox Name="ComboBox1" Width="200" Height="30" VerticalAlignment="Top" HorizontalAlignment="Left" Margin="10,10,0,0"> <ComboBoxItem>My first item</ComboBoxItem> </ComboBox> Replace first 7 lines of one file with content of another file. How to define 'Attached property' as 'SelectedValuePath' in ComboBox? (Inherited from UIElement), Occurs when a drag operation is initiated. (Inherited from DependencyObject), Occurs when the input system reports an underlying drag event with this element as the target. (Inherited from Selector), Gets or sets the selected item. Why bad motor mounts cause the car to shake and vibrate at idle but not when you give it gas and increase the rpms? Gets a value that indicates whether the user can edit text in the text box portion of the ComboBox. So, in my Constructor, I call the webservice and load the combobox, like this: So, I have defined the SelectedValue property as you proposed, and then I tried setting SelectedValue=1 both in the constructor, and in the method just above, where I populate the combobox. Stack Overflow for Teams is moving to its own domain! Should 'using' directives be inside or outside the namespace? if you want to have a default value selected you have to either say selectedvalue="ca" (where the value of a comboboxitem must fit this value) - selectedindex=0 (where the index of a comboboxitem must fit this value) - or the best of them all you say selecteditem=someclrobject (where the item of a comboboxitem must fit this value) but you should Gets or sets a value that indicates whether the drop-down portion of the ComboBox is currently open. How can I set the default selection of my ComboBox right inside my XAML code? Could an object enter or leave vicinity of the earth without being detected? texbox needs to be populated conditionally. (Inherited from ItemsControl), Called before the DragEnter event occurs. The hierarchical inheritance of ComboBox class is as follows Properties Asking for help, clarification, or responding to other answers. The thing is, I can easily set the SelectedGroupQuestionnaire to whatever I want, but it doesn't change the fact, that although it has that value, the combobox isn't visually updated, ie. Making statements based on opinion; back them up with references or personal experience. Why does sending via a UdpClient cause subsequent receiving to fail? In order to accomplish this, our UserControl will be made up of two Controls. Here is the XAML code in which two comboboxes have been created with some properties. Just debug into your get method in "selectedOption" property to check it. (Inherited from Control), Called before the DragOver event occurs. Gets or sets the content for the control's header. How can i set the SelectedIndex of a combobox inside a GridView inside a ListView. In your constructor set selectedvalue = 1; (Or your default value) In you XAML < ComboBox x: Name ="cbo" Grid.Column ="1" Grid.Row ="4" ItemsSource =" { Binding YourCollection }" DisplayMemberPath ="Name" SelectedValuePath ="CategoryId" SelectedValue =" { Binding SelectedCategory, Mode =TwoWay}" HorizontalAlignment ="Left" MaxWidth ="250"/> To subscribe to this RSS feed, copy and paste this URL into your RSS reader. What is this political cartoon by Bob Moran titled "Amnesty" about? @BobbyRicky Tag does nothing. What are some tips to improve this product photo? C# : WinForms : ComboBox : DropDown style : SelectedItem + SelectedIndex is not set correctly : bug? We deliver solutions based on consumer and industry analysis. (Inherited from Control), Called before the KeyUp event occurs. Expose a propeerty in your VM following is the code, In your constructor set selectedvalue = 1;(Or your default value), http://forums.silverlight.net/forums/p/135466/302729.aspx#302729, var SelectedItems = PhysicianComboBox.Where(p => p.StaffId == PhysicianId).ToList(); if (SelectedItems!=null) { if (SelectedItems.Count>0) PhysicianSelectedIndex = PhysicianComboBox.ToList().IndexOf(SelectedItems[0]); }. (Inherited from FrameworkElement), Gets or sets the degree of the object's opacity. Parent objects that implement custom layout for their child elements should call this method from their layout override implementations to form a recursive layout update. Setting a Default value in XAML in combobox, Going from engineer to entrepreneur takes more than just good code (Ep. So far this is what I have. 504), Mobile app infrastructure being decommissioned. Set Person to appropriate value in your ViewModel (perhaps the constructor if you want default item). I have an example here: http://www.codeproject.com/KB/silverlight/SilverlightMVVMVideoPlay.aspx First, you MUST set the default value for SelectedIndex to -1. I am setting value SiteSurveyModel.FuelType == "Diesel" And. (Inherited from FrameworkElement), Gets or sets an object source used to generate the content of the ItemsControl. When the migration is complete, you will access your Teams at stackoverflowteams.com, and they will no longer appear in the left sidebar on stackoverflow.com. Wpf: adding new row to datagrid, but there's no default value Bind observerbaleCollection to wpf combo box So it can be extremely dangerous in terms of triggering unexpected/surprising behaviour.