WinForms ComboBox DropDown and Autocomplete window both appear

Question

I\'ve got a ComboBox on a winforms app with this code:

comboBox1.AutoCompleteMode = AutoCompleteMode.SuggestAppend;
comboBox1.AutoCompleteSource         


        

Answer 1

I'm a Brasilian student of encoding and I lose many hours seeking to fix it im my project. And here, I saw it in a few seconds!!!

My code seems like this:

private void populateCombos()
    {
        persist.ShowLst(dspMember, vlMember,varTable,lstBox,varWhere);
        persist.ShowLst(dspMember, vlMember,varTable,ddlist1,varWhere);
        persist.ShowLst(dspMember, vlMember,varTable, ddlist2,varWhere);

        ddList1.Text = null;
        ddList2.Text = null;

        lstBox.AutoCompleteMode = AutoCompleteMode.SuggestAppend;
        lstBox.AutoCompleteSource = AutoCompleteSource.ListItems;
        lstBox.Text = null;
    }

Answer 2

Select the ComboBox from the design view and set "Append" to the AutoCompleteMode property, this will suggest the item without apearing a window.

Answer 3

You simply add item in collection.

Now go properties option of combo box choose AutoCompleteSource=ListItems AutocompleteMode=suggest

note: autocomplete source have many option as per your requirement :)

Answer 4

Select the ComboBox from the design view and set "None" to the AutoCompleteMode property.

Answer 5

Add to the/a keypress event.

    Dim box As ComboBox = sender
    box.DroppedDown = False

Answer 6

WinForms ComboBox DropDown...the answer is this...
write below code in comboBox1 Enter event..

private void comboBox1_Enter(object sender, EventArgs e)
{
    comboBox1.DroppedDown = true;
}

Now for comboBox1 AutoComplete...
write this AutoComplete() in page load event..so it work...

public void AutoComplete()
{
    try
    {
        MySqlConnection conn = new 
        MySqlConnection("server=localhost;database=databasename;user
            id=root;password=;charset=utf8;");
        MySqlCommand cmd = new MySqlCommand("select distinct
            (columnName) from tablename", conn);
        DataSet ds = new DataSet();
        MySqlDataAdapter da = new MySqlDataAdapter(cmd);
        da.Fill(ds, "tablename");
        AutoCompleteStringCollection col = new
        AutoCompleteStringCollection();

        int i = 0;
        for (i = 0; i <= ds.Tables[0].Rows.Count - 1; i++)
        {
            col.Add(ds.Tables[0].Rows[i]["columnName"].ToString());
        }
        comboBox1.AutoCompleteSource = AutoCompleteSource.CustomSource;
        comboBox1.AutoCompleteCustomSource = col;
        comboBox1.AutoCompleteMode = AutoCompleteMode.Suggest;
        if (conn.State == ConnectionState.Open)
        {
            conn.Close();
        }
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK,
    MessageBoxIcon.Error);
    }
}