combo box writes vice versa

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Hi,
I'v written the code below for TextChanged event of a comboBox , but when I try to write something it just writes it vice versa(For example : when I type google it writes elgoog ), how can I make it right?
code:

C#

combo.Items.Clear();
foreach (string a in Addresses)
    if (a.Contains(combo.Text))
        combo.Items.Add(a);
combo.DroppedDown = true;

Thanks

Posted 5-Nov-11 5:14am

mehdi_k

Updated 5-Nov-11 5:53am

v2

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2 solutions

Solution 1

Instead of using the Add method, use Insert instead:

C#

combo.Items.Clear();
foreach (string a in Addresses)
    if (a.Contains(combo.Text))
        combo.Items.Insert(0, a);
combo.DroppedDown = true;

This way the later items are always at the front.

Posted 5-Nov-11 6:25am

OriginalGriff

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LanFanNinja · Accepted Answer · 2011-11-05T06:43:00

Solution 1 is a good suggestion although it will not fix the problem with the text written backwards you need to move the text caret to the end of the line using some thing like combo.SelectionStart = combo.Text.Length; as shown below.

C#

private void comboBox1_TextChanged(object sender, EventArgs e)
{
    string[] Addresses = { "http://google.com/", "http://www.yahoo.com/" };

    comboBox1.Items.Clear();
    foreach (string a in Addresses)
        if (a.Contains(combo.Text))
            combo.Items.Add(a);
    combo.DroppedDown = true;

    combo.SelectionStart = combo.Text.Length;
}

Some code that might help you figure something out with selecting using keyboard:

C#

List<int> matchingIndexes = new List<int>();
int index = 0;
bool selecting = false;
private void comboBox1_TextChanged(object sender, EventArgs e)
{
    string[] Addresses = { "http://google.com/", "http://www.yahoo.com/" };

    if (!selecting)
    {
        comboBox1.Items.Clear();
        matchingIndexes.Clear();
        foreach (string a in Addresses)
        {
            if (a.Contains(comboBox1.Text))
            {
                comboBox1.Items.Add(a);
                matchingIndexes.Add(comboBox1.Items.IndexOf(a));
            }
        }
        comboBox1.DroppedDown = true;

        comboBox1.SelectionStart = comboBox1.Text.Length;
    }
}

private void comboBox1_KeyDown(object sender, KeyEventArgs e)
{
    if (e.KeyCode == Keys.Down)
    {
        selecting = true;
        if (index > matchingIndexes.Count - 1)
        {
            index = matchingIndexes.Count - 1;
        }
        else if (index < 0)
        {
            index = 0;
        }
        comboBox1.SelectedIndex = matchingIndexes[index++];
    }
    else if (e.KeyCode == Keys.Up)
    {
        selecting = true;
        if (index < 0)
        {
            index = 0;
        }
        else if (index > matchingIndexes.Count - 1)
        {
            index = matchingIndexes.Count - 1;
        }
        comboBox1.SelectedIndex = matchingIndexes[index--];
    }
}

private void comboBox1_KeyUp(object sender, KeyEventArgs e)
{
    if (e.KeyCode == Keys.Down || e.KeyCode == Keys.Up)
    {
        selecting = false;
    }
}