AutoCompleteStringCollection collection = new AutoCompleteStringCollection();
// 獲取單位列表
List<string> unitNameList = this.getAllUnitName();
foreach (string unitname in unitNameList)
{
collection.Add(unitname);
//Console.WriteLine("自動提示" + unitname);
}
this.comboBox2.AutoCompleteCustomSource = collection;
this.comboBox2.AutoCompleteSource = AutoCompleteSource.CustomSource;
this.comboBox2.AutoCompleteMode = AutoCompleteMode.SuggestAppend;

// 獲取單位列表
List<string> unitNameList = this.getAllUnitName();
foreach (string unitname in unitNameList)
{
this.comboBox2.Items.Add(unitname);
}
this.comboBox2.AutoCompleteSource = AutoCompleteSource.ListItems;