private void InitAutoComplete()
{
var source = new AutoCompleteStringCollection();
source.AddRange(ScanDataBaseManager.GetSearchHistory().Select(x => x.Content).ToArray());
textBox1.AutoCompleteCustomSource = source;
textBox1.AutoCompleteMode = AutoCompleteMode.SuggestAppend;
textBox1.AutoCompleteSource = AutoCompleteSource.CustomSource;
}