Clever Geek Handbook

ComboBox AutoComplete with key / value

I have a ComboBox with the following code:

private void comboBox1_TextChanged(object sender, EventArgs e)
{
    using (var service = WebServiceHelper.GetCoreService())
    {
        string physicianXml = service.SearchPhysicians(SessionInfo.Current.ClientCode, SessionInfo.Current.MachineName,
                                    SessionInfo.Current.Username, comboBox1.Text);

        var physicians = PhysicianItemList.FromXml(physicianXml);

        AutoCompleteStringCollection autoCompleteStringCollection = new AutoCompleteStringCollection();
        foreach (var physician in physicians.Items)
        {
            autoCompleteStringCollection.Add(physician.LastName + ", " + physician.FirstName);
        }

        comboBox1.AutoCompleteCustomSource = autoCompleteStringCollection;
        comboBox1.Select(comboBox1.Text.Length, 0);
    }
}

Basically, the user enters the first few characters of the doctor's name, and he should populate the autocomplete list with top 100 matching entries. It works fine, but I need to associate it with a key (either the PC from the table or the NPI number of the doctor). It seems that AutoCompleteStringCollection

does not support the keys. Can anyone suggest a way to do this? There are about 7 million records in the table, so I don't want to pre-fill the ComboBox.

thank

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3 answers


When you create yours AutoCompleteStringCollection

, create a Dictionary<String, int>

for the name, id pairs as well. Then use some event (text field validation or user request / click save) to find and set the id. You can save the dictionary in a text box Tag

.

Edit

For some reason I thought you were working with a textbox control. Forget about AutoCompleteStringCollection

and just create Dictionary<String, int>

. For the combobox to set your autocompletesource to ListItems, set the display name and value of the displayed list and set the data source in the dictionary.



combobox.DisplayMember = "key";
combobox.ValueMember = "value";
combobox.AutocompleteSource = AutocompleteSource.ListItems;
combobox.DataSource = myDictionary;

However, you only have to fill the datasource and autocomplete once when the user enters n characters into the combo box, otherwise it becomes an error. I tried to use this for dynamic autocomplete once (for example the list is cleared if the user clears the text and types), but I had to forget about the dropdown and use a combo box approach like this user

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It looks like your problem is that AutoCompleteStringComplete was created specifically for strings (hence the name).



You may want to look into the parents' ( IList

, ICollection

, IEnumerable

), and see if you can run something template in relation to the key / value structure.

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Too late, but maybe someone will use this code:

this.AutoCompleteSource = System.Windows.Forms.AutoCompleteSource.ListItems;
this.AutoCompleteMode = System.Windows.Forms.AutoCompleteMode.SuggestAppend;

RNProveedor rnProveedor = new RNProveedor();
var listaProveedores = rnProveedor.Buscar();
Dictionary<int, String> dicTemp = new Dictionary<int, string>();

foreach (var entidad in listaProveedores)
{
    dicTemp.Add(entidad.ProvNro, entidad.ProNombre);
}

this.DataSource = new BindingSource(dicTemp, null);
this.DisplayMember = "Value";
this.ValueMember = "Key";

And to choose a value

public int GetValorDecimal()
{
    KeyValuePair<int, string> objeto = (KeyValuePair<int, string>)this.SelectedItem;     
    return objeto.Key;
}

For this example, you will have no problem with duplicate lines as the examples above

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