List and Comboboxes can contain objects rather than simply strings. Rather than defining the contents in the Designer, you can set a List(Of T) (among others) as the DataSource. This allows you to display one thing but fetch a different thing such as a value back. This is so useful, it is not uncommon to … Read more
You can simply set a String to the Text property of that Combobox. This will give you the desired behaviour. Keep in mind that your code must take into account that this combo may have not any item selected. You can check this by the SelectedIndex property that will be -1.
Try this: using System; using System.Collections.Generic; using System.Runtime.InteropServices; using System.Windows.Forms; using Opulos.Core.Win32; namespace Opulos.Core.UI { // Extension class to disable the auto-select behavior when a combobox is in DropDown mode. public static class ComboBoxAutoSelectEx { public static void AutoSelectOff(this ComboBox combo) { Data.Register(combo); } public static void AutoSelectOn(this ComboBox combo) { Data data = null; … Read more
As far as I know, Interaction.Triggers can not be applied in Style, respectively and in a ResourceDictionary. But you can do so, to determine the ComboBox as a resource with x:Shared=”False” and reference it for ContentControl like this: <Window.Resources> <ComboBox x:Key=”MyComboBox” x:Shared=”False” ItemsSource=”{Binding Branches}” DisplayMemberPath=”BranchName” SelectedItem=”{Binding SelectedBranch}”> <i:Interaction.Triggers> <i:EventTrigger EventName=”SelectionChanged”> <i:InvokeCommandAction Command=”{Binding SelectCustomerCommand}” /> </i:EventTrigger> … Read more
I was able to come up with some very simple code to perform this (see snippet below). The code creates a control that is a dropdown control which shows a small colored square and that color’s name in the same row (see photo). Thanks for the links provided for this back when it was originally … Read more
You have to Insert to the object you are databinding to rather than to the combobox. You can’t insert directly into the combobox. You can use this: DataTable dt = new DataTable(); dt.Columns.Add(“ID”, typeof(int)); dt.Columns.Add(“CategoryName”); DataRow dr = dt.NewRow(); dr[“CategoryName”] = “Select”; dr[“ID”] = 0; dt.Rows.InsertAt(dr, 0); cmbCategory.DisplayMember = “CategoryName”; cmbCategory.ValueMember = “ID”; cmbCategory.DataSource = … Read more
The calculated column solution is probably the best one. But if you can’t alter the data table’s schema to add that, you can loop through the table and populate a new collection that will serve as the data source. var dict = new Dictionary<Guid, string>(); foreach (DataRow row in dt.Rows) { dict.Add(row[“GUID”], row[“Name”] + ” … Read more
Styling to select option is very much limited as to maintain a coherence and consistency among all the application in the operating system thus the browser are ought to restrict the style of some basic elements like in your case option tag. The restriction depends browser to browser, like padding and even margin of option … Read more
Define a class public class Language { public string Name { get; set; } public string Value { get; set; } } then… //Build a list var dataSource = new List<Language>(); dataSource.Add(new Language() { Name = “blah”, Value = “blah” }); dataSource.Add(new Language() { Name = “blah”, Value = “blah” }); dataSource.Add(new Language() { Name … Read more
SortedDictionary<string, int> userCache = new SortedDictionary<string, int> { {“a”, 1}, {“b”, 2}, {“c”, 3} }; comboBox1.DataSource = new BindingSource(userCache, null); comboBox1.DisplayMember = “Key”; comboBox1.ValueMember = “Value”; But why are you setting the ValueMember to “Value”, shouldn’t it be bound to “Key” (and DisplayMember to “Value” as well)?