Autocomplete TextBox Up and Down key Cant Select item in list

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In C# Winforms, I have a textbox with AutoCompleteMode. When the user types some letters the suggestion list is shown Correctly. If an item in list is selected using (Keyboard)UP and Down key it could not Select an item. If i Select mean, it will get the first item in list..

How can i rectify this...Please Suggest..

Here My Code...

C#

private void txt_Name_TextChanged(object sender, EventArgs e)
        {
            try
            {
                SqlDataReader datareader = qu.GetValue("English_Short");
                AutoCompleteStringCollection local = new AutoCompleteStringCollection();
                if (datareader.HasRows == true)
                {
                    while (datareader.Read())
                        local.Add(datareader["English_Short"].ToString());
                }
                txt_Name.AutoCompleteMode = AutoCompleteMode.Suggest;
                txt_Name.AutoCompleteSource = AutoCompleteSource.CustomSource;
                txt_Name.AutoCompleteCustomSource = local;
            }
            catch (Exception)
            { }
        }

Posted 4-Jul-13 5:14am

MichealRay

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MichealRay · Accepted Answer · 2013-07-04T06:36:00

Yes, I rectify this Issue...Use Form_Load Instead of Text_Changed Event..BCoz it should assign only once.

C#

private void Form_Load(object sender, EventArgs e)
        {
            try
            {
                SqlDataReader datareader = qu.GetValue("ITEM_CODE");
                using (DataTable dt = new DataTable())
                {
                    dt.Load(datareader);
                    AutoCompleteStringCollection local = new AutoCompleteStringCollection();
                    if (dt.Rows.Count >= 0)
                    {
                        for (int count = 0; count < dt.Rows.Count; count++)
                        {
                            local.Add(dt.Rows[count]["ITEM_CODE"].ToString());
                        }
                    }
                    txt_Code.AutoCompleteMode = AutoCompleteMode.Suggest;
                    txt_Code.AutoCompleteSource = AutoCompleteSource.CustomSource;
                    txt_Code.AutoCompleteCustomSource = local;
                }
            }

catch (Exception)
{ }

}

MichealRay · Accepted Answer · 2013-07-04T06:38:00

Solution 2

Use Form_Load Instead of Text_Changed Event..BCoz it should assign only once.

Posted 4-Jul-13 6:38am