how to create editable combobox in wpf

hello anand,

you can refer my reply to another question which was similar to this "https://www.c-sharpcorner.com/Forums/combo-box-behavior-properties-to-use-first-char-typed"

but i can explain you again, you need write behaviour in wpf to achive this and bind with your combobox control.

i will write blog on this if this topic is not avaible in other forums.

public static class EditableComboBoxBehavior
{
public static readonly DependencyProperty AcceptsEnterKeyProperty =
DependencyProperty.RegisterAttached("AcceptsEnterKey", typeof(bool), typeof(EditableComboBoxBehavior), new PropertyMetadata(default(bool), OnEnterKeyPress));
public static void SetAcceptsEnterKey(DependencyObject element, bool value)
{
element.SetValue(AcceptsEnterKeyProperty, value);
}
public static bool GetAcceptsEnterKey(DependencyObject element)
{
return (bool)element.GetValue(AcceptsEnterKeyProperty);
}
private static void OnEnterKeyPress(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs eventArgs)
{
var element = (UIElement)dependencyObject;
if ((bool)eventArgs.NewValue)
{
element.PreviewKeyDown += PreviewKeyDown;
element.KeyUp += KeyDown;
}
else
{
element.PreviewKeyDown -= PreviewKeyDown;
element.KeyUp -= KeyDown;
}
}
// implemented KeyDown and PreviewKeyDown methods to set the focus of the elemtn in combox box and set the selection etc etc.
}

xmal part

"True" ItemsSource="{Binding Items}"
SelectedValue="{Binding Item}"
Text="{Binding Item, Mode=TwoWay, UpdateSourceTrigger=LostFocus}"
StaysOpenOnEdit="False" IsTextSearchCaseSensitive="False"
EditableComboBoxBehavior.AcceptsEnterKey="True"
ShouldPreserveUserEnteredPrefix="True">

let me know if that works for you

2 Replies

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Ashutosh Gupta6y ago
Accepted answer
hello anand,
you can refer my reply to another question which was similar to this "https://www.c-sharpcorner.com/Forums/combo-box-behavior-properties-to-use-first-char-typed"

but i can explain you again, you need write behaviour in wpf to achive this and bind with your combobox control.
i will write blog on this if this topic is not avaible in other forums.
public static class EditableComboBoxBehavior
{
public static readonly DependencyProperty AcceptsEnterKeyProperty =
DependencyProperty.RegisterAttached("AcceptsEnterKey", typeof(bool), typeof(EditableComboBoxBehavior), new PropertyMetadata(default(bool), OnEnterKeyPress));

public static void SetAcceptsEnterKey(DependencyObject element, bool value)
{
element.SetValue(AcceptsEnterKeyProperty, value);
}
public static bool GetAcceptsEnterKey(DependencyObject element)
{
return (bool)element.GetValue(AcceptsEnterKeyProperty);
}
private static void OnEnterKeyPress(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs eventArgs)
{
var element = (UIElement)dependencyObject;
if ((bool)eventArgs.NewValue)
{
element.PreviewKeyDown += PreviewKeyDown;
element.KeyUp += KeyDown;
}
else
{
element.PreviewKeyDown -= PreviewKeyDown;
element.KeyUp -= KeyDown;
}
}
// implemented KeyDown and PreviewKeyDown methods to set the focus of the elemtn in combox box and set the selection etc etc.
}
xmal part
"True" ItemsSource="{Binding Items}"
SelectedValue="{Binding Item}"
Text="{Binding Item, Mode=TwoWay, UpdateSourceTrigger=LostFocus}"
StaysOpenOnEdit="False" IsTextSearchCaseSensitive="False"
EditableComboBoxBehavior.AcceptsEnterKey="True"
ShouldPreserveUserEnteredPrefix="True">
let me know if that works for you
0
Anand6y ago
Thanks ashutosh for quick reply. i will check this.
0