How do I identify if a combobox does not contain the text that is entered in the combo box input .
For example, my combo box items are as follows:
Apple
Banana
Coconut
Now if I enter : Orange
I want to have an event notifies me my entry not in the list of items.
Hi Frederick,
Currently, the desired functionality of receiving an event notification when a combo box input text is not present in the combo box options is not supported in the SfComboBox control.
We suggest a workaround by using a custom filter in the SfComboBox at the sample level to determine the entered text is present or not in ItemsSource. We want to inform you that, filter behavior will be activated each time text is entered into the combo-box input field. The provided code snippet demonstrates how to implement this workaround, and we have included a sample for your reference. Please examine the attached sample, and don't hesitate to contact us if you have additional questions or concerns.
Please refer the below code snippet for this,
|
//In XAML
<editors:SfComboBox x:Name="comboBox" IsEditable="true" IsFilteringEnabled="true" ItemsSource="{Binding Fruits}" TextMemberPath="Name" DisplayMemberPath="Name"> <editors:SfComboBox.FilterBehavior> <local:FilteringBehavior/> </editors:SfComboBox.FilterBehavior> </editors:SfComboBox>
//In C#
public class FilteringBehavior : IComboBoxFilterBehavior { public List<int> GetMatchingIndexes(SfComboBox source, ComboBoxFilterInfo filterInfo) { List<int> filteredlist = new List<int>(); List<Model>? items = (source.ItemsSource as IEnumerable)?.OfType<Model>()?.ToList(); ;
filteredlist.AddRange(from Model item in items where item.Name.StartsWith(filterInfo.Text, StringComparison.CurrentCultureIgnoreCase) select items.IndexOf(item));
if(filteredlist.Count==0) { System.Diagnostics.Debug.WriteLine("Entered item not available"); }
return filteredlist; } } |
Regards,
Brundha V
