SelectedValue returns the string it was set to ("Messenger of the Gods"), while SelectedItem returns the actual GreekGod object with that description. It's at the databind. How to avoid acoustic feedback when having heavy vocal effects during a live performance? Note: You set the property name as a string here. This usually happens when your selected item comes from a different location than where your list of items is. Is there a term for when you use grammar from one language in another? What is the difference between a User Control Library and a Custom Control Library? How actually can you perform the trick with the "illusion of the party distracting the dragon" like they did it in Vox Machina (animated series)? So say you've bound a list to a collection of Category objects (with each Category object having Name and ID properties). This is because SelectedItem compares objects with the Items collection using .Equals(), so a reference comparism will return false which will result in your object not becomming selected. We have a ComboBox bound to a list of Categories (via ItemsSource). Its proper description follows: Note that these values are distinct from DisplayMemberPath (which is defined on ItemsControl, not Selector), but that property has similar behavior to SelectedValuePath: in the absence of a style/template, it identifies which property of the object bound to item should be used as its string representation. There was already a similar question asked on the ASP.NET Forums - The 'SelectedIndex' and 'SelectedValue' attributes are mutually exclusive. What is the difference between a field and a property? SelectedIndex-. ComboBox SelectedItem vs SelectedValue - C# [ Glasses to protect eyes while coding : https://amzn.to/3N1ISWI ] ComboBox SelectedItem vs SelectedValue - C# D. But these properties come to rescue when we want to bind our combobox with the value from already created object. If you need the selected item's index, you need the first version. While WPF supports it, it's much easier to subsribe to collection events in your own code if the instance doesn't change. SelectedValueChanged se dispara tan pronto como se hace una nueva seleccin de la parte de la lista de la ComboBox, y SelectedItemChanged se dispara cuando el elemento se muestra en la porcin TextBox del ComboBox. I'm populating the SelectedIndex and the SelectedValue with the same value matching 1:1 with the drop-down bound field (StatusID) with the index value. To learn more, see our tips on writing great answers. Before databind set SelectedIndex to -1 it should help, This can happen also if you have the selectedValue set before DataBind() call. In WPF, what are the differences between the x:Name and Name attributes? The first item in the control has 0 index and second item has 1 index and so on. How to print the current filename with a function defined in another file? rev2022.11.7.43014. I appreciate the effort put into this answer, but to be honest I was almost as confused after reading it as I was before. (Here's a further example from MSDN, using TreeView). What is the difference between const and readonly in C#? If you need neither, it's up to your personal preference. I used this FillDropdown in my dropdownlist. Let's say that you have an observable collection of object type Foo, and you have a custom ListView that the user will select from. The selected value will set list to be selected at the specified value where the selected index will select the item at the specified index. Private Sub ListBox1_SelectedValueChanged(ByVal sender As Object, ByVal e As EventArgs) If ListBox1.SelectedIndex <> -1 Then textBox1.Text = ListBox1.SelectedValue.ToString() ' If we also wanted to get the displayed text we could use ' the SelectedItem item property: ' Dim s = CType(ListBox1.SelectedItem, USState).LongName End If End Sub End Class I'm not very sure why would they say such a thing. Is there any alternative way to eliminate CO2 buildup than by breathing or even an alternative to cellular respiration that don't produce CO2? You can also use this property to programmatically select a row in the control. In C#, what is the difference between public, private, protected, and having no access modifier? This is the code that I am trying to use to set the selectedindex for the dropdownlist after binding the data: (note: strValue is the value found for the 'option value' for the listitem) CType (e.Item.FindControl ("gridPageDropDown"), DropDownList).SelectedIndex = CType (e.Item.FindControl ("gridPageDropDown"), DropDownList).Items.IndexOf . I personal think bind to the SelectedObject is much cleaner unless you need access to the SelectedIndex. and SelectedValuePath is a string. Setting SelectedValue of a DropDownList on PageLoad, Multiple dropdowns from different databases on a single view in asp.net mvc4, SSH default port not changing (Ubuntu 22.10). Note: If the drop-down list allows multiple selections it will only return the index of the first option selected. Asking for help, clarification, or responding to other answers. Can you say that you reject the null at the 95% level? How do planetarium apps and software calculate positions? The reason there was setting both the SelectedIndex and SelectedValue properties in the Page_Load event. Are you the same guy who have written book on Silverlight? Use this property to determine the value of the currently selected item displayed within the list box control. SelectedItem and SelectedValue are an object. Let's say you have a Product object, that your view is bound to (with properties for things like ProductName, Weight, etc). Have you tried setting the lists to SelectedIndex = -1? Glad you're enjoying the book :). Should I avoid attending certain conferences? Easiest way to plot a 3d polytope and test if a point is in it. WinRT XAML Databinding: How to bind to a property to the parent's data context when binding within an ItemTemplate? Every control that uses Collections to store data have SelectedValue, SelectedItem property. To be more specific if you literally want to retrieve Text of Selected Item then you can write: Your ListBox1 can also return Text using SelectedValue property if value has set to that before. SelectedIndex, SelectedValue, and FormattingEnabled are related as follows: If FormattingEnabled is false, SelectedIndex will not be set to -1 when SelectedValue is blank. Binding SelectedItem vs SelectedIndex - When should I choose one over the other? and technology enthusiasts meeting, learning, and sharing knowledge. If you need to reference only one of SelectedObject or SelectedIndex in other parts of your code, use that one. Select the