Advanced item search in combobox C#

Question

I wrote a program with C # I have a combo box whose items are Binding from the database.I use AutoCompleteMode and AutoCompleteSource to search the combo box.But only when filtering does it find words whose first letter is the same as the input letter.While I need All items that contain these letters displayed.Is there a solution to this problem?

Answer 1

maybe this helps

// Example data 
string[] data = new string[] {
    "Absecon","Abstracta","Abundantia","Academia","Acadiau","Acamas",
    "Ackerman","Ackley","Ackworth","Acomita","Aconcagua","Acton","Acushnet",
    "Acworth","Ada","Ada","Adair","Adairs","Adair","Adak","Adalberta","Adamkrafft",
    "Adams"

};
public Form1()
{
    InitializeComponent();
}

private void comboBox1_TextChanged(object sender, EventArgs e)
{
    HandleTextChanged();
}

// Handle Text Box that you Fill
private void HandleTextChanged()
{
    var txt = comboBox1.Text;
    var list = from d in data
               where d.Tolower().Contains(comboBox1.Text.ToLower())
               select d;
    if (list.Count() > 0)
    {
        comboBox1.DataSource = list.ToList();
        //comboBox1.SelectedIndex = 0;
        var sText = comboBox1.Items[0].ToString();
        comboBox1.SelectionStart = txt.Length;
        comboBox1.SelectionLength = sText.Length - txt.Length;
        comboBox1.DroppedDown = true;
        return;
    }
    else
    {
        comboBox1.DroppedDown = false;
        comboBox1.SelectionStart = txt.Length;
    }
}