//在界面构造函数里加入下面两行代码 this.cbbDepartureAirport.AutoCompleteMode = System.Windows.Forms.AutoCompleteMode.SuggestAppend; this.cbbDepartureAirport.AutoCompleteSource = System.Windows.Forms.AutoCompleteSource.ListItems;
原文：http://www.cnblogs.com/gebenhagen/p/4773266.html