combobox - w3toppers.com

WPF IsEditable=true ComboBox filled with objects displays the ToString() as the selected item

You can do this entirely within Xaml <ComboBox IsTextSearchEnabled=”True” IsEditable=”True” ItemsSource=”{Binding MyObjectCollection}” TextSearch.TextPath=”MyObjectName”> <ComboBox.ItemTemplate> <DataTemplate> <TextBlock Text=”{Binding MyObjectName}” /> </DataTemplate> </ComboBox.ItemTemplate> </ComboBox> The upside is that you can define and change this however you want in your XAML without any code-behind. You bind the ItemsSource to your collection of objects, and then you set the … Read more

What event catches a change of value in a combobox in a DataGridViewCell?

The above answer led me down the primrose path for awhile. It does not work as it causes multiple events to fire and just keeps adding events. The problem is that the above catches the DataGridViewEditingControlShowingEvent and it does not catch the value changed. So it will fire every time you focus then leave the … Read more

Binding a ComboBox to an enum nested in a class

Another way of getting the enum values for use as a data source: <Window.Resources> <ObjectDataProvider MethodName=”GetValues” ObjectType=”{x:Type sys:Enum}” x:Key=”TestValues”> <ObjectDataProvider.MethodParameters> <w:Type2 TypeName=”w:Test+TestEnum” /> </ObjectDataProvider.MethodParameters> </ObjectDataProvider> </Window.Resources> … ItemsSource=”{Binding Source={StaticResource TestValues}}” Note that you still need the Type2Extension because of weirdness with TypeExtension and nested types. But you wouldn’t need the extra custom markup extension. This … Read more

Change ComboBox Border Color in Windows Forms

You can inherit from ComboBox and override WndProc and handle WM_PAINT message and draw border for your combo box: using System; using System.Drawing; using System.Windows.Forms; public class FlatCombo : ComboBox { private const int WM_PAINT = 0xF; private int buttonWidth = SystemInformation.HorizontalScrollBarArrowWidth; Color borderColor = Color.Blue; public Color BorderColor { get { return borderColor; } … Read more

WPF Visibility of a UI element based on combo selection

There are two issues here. First the default visibility should be specified in the style. But even with that it won’t work because the binding on the trigger is comparing a SelectedValue, a ComboBoxItem object with a string object and that will never be equivalent. To keep the example simple, I’ve placed appropriate values in … Read more

ComboBox.ValueMember and DisplayMember

You should not set datasource of your listbox and/or combobox in this order ComboBox1.DataSource = dataTable; ComboBox1.ValueMember = “id”; ComboBox1.DisplayMember = “name”; Instead, this is correct order: ComboBox1.ValueMember = “id”; ComboBox1.DisplayMember = “name”; ComboBox1.DataSource = dataTable; NOTE: setting datasource should be last line. If you set datasource first, SelectedIndexChanged event will fire and you may … Read more

Autocomplete combobox for WPF

After a lot of fiddling, I have managed to arrive at a complete, working solution. (Or so it seems.) Step 1. Modify XAML markup You need to modify your ComboBox like so: <ComboBox … IsTextSearchEnabled=”False” … PreviewTextInput=”PreviewTextInput_EnhanceComboSearch” PreviewKeyUp=”PreviewKeyUp_EnhanceComboSearch” DataObject.Pasting=”Pasting_EnhanceComboSearch” /> ie. to disable default text search, and add events handlers that will take care of … Read more

JavaFX – Filtered ComboBox

As far as the filtering of the drop down is concerned. Isn’t wrapping the list of possible options in a FilteredList the best solution? MCVE: import javafx.application.Application; import javafx.application.Platform; import javafx.collections.FXCollections; import javafx.collections.ObservableList; import javafx.collections.transformation.FilteredList; import javafx.scene.Scene; import javafx.scene.control.ComboBox; import javafx.scene.control.TextField; import javafx.scene.layout.HBox; import javafx.stage.Stage; public class MCVE extends Application { public void start(Stage stage) … Read more

ComboBox AutoComplete on SubString

Here is the C# version. It has a lot of options to it. using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace WindowsFormsApplication1 { public partial class Form1 : Form { public Form1() { this.Load += new EventHandler(this.Form1_Load); InitializeComponent(); } private clsCustomAutoCompleteTextbox ClsCustomAutoCompleteTextbox1 = null; private List<string> … Read more

How to populate c# windows forms combobox?

Below are the important properties for you. ComboBox.DataSource Property A data source can be a database, a Web service, or an object that can later be used to generate data-bound controls. When the DataSource property is set, the items collection cannot be modified. ComboBox.DisplayMember Property A String specifying the name of an object property that … Read more