Textbox像百度一下实现下拉显示 z
List<string> Data = new List<string>(); string Randomstr = "功夫撒黑胡椒hcbvf蜂窝qwertyuiopasdfghjklzxcvbnm法国的恢复到飞范德萨QWERTYUIOPASDFGHJKLZXCVBNM出现过热423贴①46546也有一头热刚恢复到贴3天赋如头3广泛的我让他"; Random rd = new Random(GetRandomSeed()); static int GetRandomSeed() { byte[] bytes = new byte[4]; System.Security.Cryptography.RNGCryptoServiceProvider rng = new System.Security.Cryptography.RNGCryptoServiceProvider(); rng.GetBytes(bytes); return BitConverter.ToInt32(bytes, 0); } public Form1() { InitializeComponent(); for (int i = 0; i < 20000000; i++) { Data.Add(Randomstr.ToCharArray()[rd.Next(Randomstr.Length)].ToString() + Randomstr.ToCharArray()[rd.Next(Randomstr.Length)].ToString() + Randomstr.ToCharArray()[rd.Next(Randomstr.Length)].ToString() + Randomstr.ToCharArray()[rd.Next(Randomstr.Length)].ToString() + Randomstr.ToCharArray()[rd.Next(Randomstr.Length)].ToString()); } this.textBox1.AutoCompleteCustomSource.Clear(); this.textBox1.AutoCompleteCustomSource.AddRange(Data.ToArray()); this.textBox1.AutoCompleteMode = System.Windows.Forms.AutoCompleteMode.SuggestAppend; this.textBox1.AutoCompleteSource = System.Windows.Forms.AutoCompleteSource.CustomSource; }
面是2000W数据加载后的效果