RadAutoCompleteBox

[Amos]

Hi,

Is there any way to allow RadAutoCompleteBox auto suggestion item to select only unique items. For example, RadAutoCompleteBox has item A, item B and item C. I don't want user to choose Item A two times. Would like to remove previously selected item from auto suggestion list. For example Item A is already in the RadAutoCompleteBox.Items collection, want to show only item B and C in auto complete suggestion box. If not possible to do that, want to cancel the selection if existing item is selected again. Is it possible to do that?

 

[Dess | Tech Support Engineer, Principal]

Hello Amos,

Thank you for writing.

You can achieve your requirement by setting the RadAutoCompleteBox.ListElement.DataLayer.DataView.Filter predicate. Thus, you can control whether a specific RadListDataItem will be displayed in the popup or not. Here is a sample implementation:

public Form1()
{
    InitializeComponent();

    List<Item> items = new List<Item>();
    items.Add(new Item(1,"A1"));
    items.Add(new Item(2,"A2"));
    items.Add(new Item(3,"A3"));
    this.radAutoCompleteBox1.AutoCompleteDataSource = items;
    this.radAutoCompleteBox1.AutoCompleteDisplayMember = "Name";
    this.radAutoCompleteBox1.AutoCompleteValueMember = "Id";

    this.radAutoCompleteBox1.ListElement.DataLayer.DataView.Filter = FilterItem;
}

private bool FilterItem(RadListDataItem item)
{
    string[] tokens = this.radAutoCompleteBox1.Text.Split(new char[] { ';' },
        StringSplitOptions.RemoveEmptyEntries);
    if (tokens.Length > 0)
    {
        foreach (string token in tokens)
        {
            if (item.Text.StartsWith(token))
            {
                return false;
            }
        }
    }

    return true;
}

public class Item
{
    public int Id { get; set; }

    public string Name { get; set; }

    public Item(int id, string name)
    {
        this.Id = id;
        this.Name = name;
    }
}

I hope this information helps. Should you have further questions, I would be glad to help.

 

Regards,
Dess
Telerik

[Amos]

Thanks you. It helps me.

Regards

[Smisha]

It's not working for me when i set autocompletemode to append or suggestappend

[Dess | Tech Support Engineer, Principal]

Hello, Smisha,   

I have attached my sample project for your reference. Please give it a try and see how it works on your end with the latest version of the Telerik UI for WinForms suite.

I hope this information helps.

Regards,
Dess | Tech Support Engineer, Sr.
Progress Telerik