Combobox select item in dropdown list C#

Question

I have an combobox poppulated with items from a database table. When I change the text i repopulate the combobox with items from the database table.

But when I enter text and the list with suggestions opens no item in de list is selected. And i want a item to be selected so when you press enter that it becomes the selected item.

This is a winforms application.

Thanks.

 cbxNaam.Items.Clear();
 string query = "SELECT bedr_naam FROM tblbedrijf WHERE bedr_naam LIKE '%" + cbxNaam.Text + "%'";
 string[] bedrijfsnamen = Functions.DataTableToArray(Global.db.Select(query));
 cbxNaam.Items.AddRange(bedrijfsnamen);
 cbxNaam.Select(cbxNaam.Text.Length + 1, 0);

Why don't you use autocompletion: http://msdn.microsoft.com/en-us/library/system.windows.forms.combobox.autocompletemode.aspx — Emond, Aug 29 '12 at 09:35

dice · Answer 1 · 2012-08-29T09:54:21.640

1

You need to select an item in the list - it looks like you are trying to select some text in an item.

piecing together some info from your other comments it looks like you want to essentially do a wildcard match on the text in the dropdown list, to do this you will need to modify behaviour of the handler for the text changed event/method, either derive from combobox and override it or ad an event listener on your instance.

you can then do a search on the data in your array - something like

private void cbxNaam_TextChanged(object sender, EventArgs e)
{
     var matchingStrings = bedrijfsnamen.Where(s => s.Contains(cbxNaam.Text));
     cbxNaam.SelectedItem = matchingStrings[0];
}

you will need to be a little careful of multiple matching items etc.

edited Aug 29 '12 at 09:54

answered Aug 29 '12 at 09:36

dice

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this will select the combobox item and i want it to select an item in the dropdown list of the droplist – Willem T Aug 29 '12 at 09:38
see update to text above - I think this is more what you want – dice Aug 29 '12 at 10:06

score 0 · Answer 2 · edited May 23 '17 at 12:07

0

If you are using WINFORMS,

You have to use AutoCompleteMode set to AutoCompleteMode.Append and AutoCompleteSource set to AutoCompleteSource.ListItems

Please check this answer ComboBox AutoComplete Custom Capabilities

edited May 23 '17 at 12:07

Community

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1

answered Aug 29 '12 at 09:33

Krishnakumar

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But when i use this it only autocompletes from the start of the string. So when i enter a partial string of the name that is halfway in the string it does not work – Willem T Aug 29 '12 at 09:35
Sorry, windows combo box AutoComplete [match with prefix only](http://stackoverflow.com/a/2314248/1547740)... So you have to write your custom control. – Krishnakumar Aug 29 '12 at 09:46

score 0 · Answer 3 · answered Aug 29 '12 at 09:39

I don't know if I understand you good, sorry if not! Here is my answer:

If you want for your comboBox to be populated when you write in you comboBox you need to set its properties:

AutoCompleteMode to Append and AutoCompleteSource to ListItems

on Enter your item will be selected.

Hope I helped you? Rock On!!!:-)

Combobox select item in dropdown list C#

3 Answers3