C# ComboBox自动完成功能的例子

DataTable dt = new DataTable();
dt.Columns.Add("Name");
dt.Columns.Add("VV");
dt.Rows.Add(new string[] { "王一", "x" });
dt.Rows.Add(new string[] { "赵一", "z" });
dt.Rows.Add(new string[] { "王二", "y" });
dt.Rows.Add(new string[] { "赵二", "w" });

this.comboBox1.DataSource = dt;
this.comboBox1.DisplayMember = "Name";
this.comboBox1.ValueMember = "VV";
this.comboBox1.AutoCompleteSource = AutoCompleteSource.ListItems;
this.comboBox1.AutoCompleteMode = AutoCompleteMode.SuggestAppend;