最近因项目中要用,于是就扩展了TextBox实现输入汉字首字母简单查询。控件扩展代码很简单。但是刚开始,一直没有找到扩展入口,始终无法展现下拉框。先想通过AutoCompleteCustomSource属性改变来实现,但最终没法扩展。后又想到ComboBox但是,也不好控制。经过一天的思考后决定用TextBox + ListBox组合扩展(主要为继承至TextBox和持有ListBox

效果先上:

最要实现代码有:

类原型public class SpellSearchBoxEx : TextBox

1

 

SpellSearchSource :查询数据源(汉字)

事件的绑定和选择全在属性里;

  1. public string[] SpellSearchSource  
  2.  
  3.         {  
  4.  
  5.             get { return source; }  
  6.  
  7.             set 
  8.  
  9.             {  
  10.  
  11.                 if (value != null)  
  12.  
  13.                 {  
  14.  
  15.                     source = value;  
  16.  
  17.                     InitSourceSpell();//实现数据转化为相应拼音并存储;  
  18.  
  19.                     TextChanged += new EventHandler(SpellSearchBoxEx_TextChanged);  
  20.  
  21.                     LostFocus += new EventHandler(SpellSearchBoxEx_LostFocus);  
  22.  
  23. // searchList是一个ListBox,它用来显示下拉框;  
  24.  
  25.                     searchList.KeyDown += new KeyEventHandler(searchList_KeyDown);  
  26.  
  27.                     searchList.Click += new EventHandler(searchList_Click);  
  28.  
  29.                     searchList.MouseMove += new MouseEventHandler(searchList_MouseMove);  
  30.  
  31.                 }  
  32.  
  33.    
  34.  
  35.             }  
  36.  
  37.  
  38. }  
  39.  

2TextChanged事件代码

  1. foreach (string var in spellList)  
  2.             {  
  3.                 if (SearchMode == SearchMode.Contains)  
  4.                 {  
  5.                     if (var.IndexOf(str.ToUpper()) != -1)  
  6.                     {  
  7.                         searchList.Items.Add(source[spellList.IndexOf(var)]);  
  8.                     }  
  9.                 }  
  10.                 else 
  11.                 {  
  12.                     if (var.ToUpper().StartsWith(str.ToUpper()))  
  13.                     {  
  14.                         for (int i = 0; i < spellList.Count; i++)  
  15.                         {  
  16.                             if (spellList[i].Equals(var) && !searchList.Items.Contains(source[i]))  
  17.                             {  
  18.                                 searchList.Items.Add(source[i]);  
  19.                             }  
  20.                         }  
  21.                     }  
  22.                 }  
  23.             }  
  24.             if (Regex.IsMatch(str, "[\u4e00-\u9fa5]+"))  
  25.             {  
  26.  
  27.                 foreach (string var in source)  
  28.                 {  
  29.                     if (SearchMode == SearchMode.Contains)  
  30.                     {  
  31.                         if (var.ToUpper().IndexOf(str.ToUpper()) != -1 && !searchList.Items.Contains(var))  
  32.                         {  
  33.                             searchList.Items.Add(var);  
  34.                         }  
  35.                     }  
  36.                     else 
  37.                     {  
  38.                         if (var.ToUpper().StartsWith(str.ToUpper()) && !searchList.Items.Contains(var))  
  39.                         {  
  40.                             searchList.Items.Add(var);  
  41.                         }  
  42.                     }  
  43.                 }  
  44.  
  45.             }  
  46.             SetSearchBoxState();  
  47.  
  48.         }  

     

3:控制ListBox的显示和隐藏

  1. private void SetSearchBoxState()  
  2.  
  3.         {  
  4.  
  5.             if (searchList.Items.Count > 0)  
  6.  
  7.             {  
  8.  
  9.                 searchList.BorderStyle = BorderStyle.FixedSingle;  
  10.  
  11. // maxItemCount为下拉框最大显示数;  
  12.  
  13.                 searchList.Height = ((searchList.Items.Count >= maxItemCount ? maxItemCount : searchList.Items.Count) + 1) * searchList.ItemHeight;  
  14.  
  15.                 searchList.Parent = this.Parent;  
  16.  
  17.                 searchList.Location = new System.Drawing.Point(this.Left, this.Bottom);  
  18.  
  19.                 searchList.Width = this.Width;  
  20.  
  21.                 searchList.BringToFront();  
  22.  
  23.                 searchList.Visible = true;  
  24.  
  25.             }  
  26.  
  27.             else 
  28.  
  29.             {  
  30.  
  31.                 searchList.Visible = false;  
  32.  
  33.             }  
  34.  
  35.         }  
  36.  
  37.     

4:剩下的为:控制鼠标滑动和键盘方向键操作,很简单,主要利用ListBox的选中项为高亮显示;及在textBox LostFocus 并非ListBox获得焦点时隐藏结果控件ListBox

5

ListBox上回车或者是点击时提交代码

6:主体汉字检索拼音转化代码,见下:很简单,可以直接复制拿来用。

代码
 
  1. using System;  
  2.  
  3. using System.Collections.Generic;  
  4.  
  5. using System.Text;  
  6.  
  7. using System.Text.RegularExpressions;  
  8.  
  9.    
  10.  
  11. namespace GroupControl.SplitWord  
  12.  
  13. {     
  14.  
  15.     /// 用C#实现汉字转化为拼音   
  16.  
  17.     /// 实现的原理就是先将汉字转化成为内码,然后通过内码和拼音的对照来查找。   
  18.  
  19.     public class SplitWord  
  20.  
  21.     {          
  22.  
  23.         /// <summary>   
  24.  
  25.         ///将所有的汉字转换成为拼音(小写)          
  26.  
  27.         /// </summary>   
  28.  
  29.         static Regex MyRegex = new Regex("^[\u4e00-\u9fa5]$"); //汉字的正则表达式.eg: if(MyRegex.IsMatch(chrstr.ToString()))  
  30.  
  31.         private static int[] pyvalue = new int[]{-20319,-20317,-20304,-20295,-20292,-20283,-20265,-20257,-20242,-20230,-20051,-20036,-20032,-20026,   
  32.  
  33. -20002,-19990,-19986,-19982,-19976,-19805,-19784,-19775,-19774,-19763,-19756,-19751,-19746,-19741,-19739,-19728,   
  34.  
  35. -19725,-19715,-19540,-19531,-19525,-19515,-19500,-19484,-19479,-19467,-19289,-19288,-19281,-19275,-19270,-19263,   
  36.  
  37. -19261,-19249,-19243,-19242,-19238,-19235,-19227,-19224,-19218,-19212,-19038,-19023,-19018,-19006,-19003,-18996,   
  38.  
  39. -18977,-18961,-18952,-18783,-18774,-18773,-18763,-18756,-18741,-18735,-18731,-18722,-18710,-18697,-18696,-18526,   
  40.  
  41. -18518,-18501,-18490,-18478,-18463,-18448,-18447,-18446,-18239,-18237,-18231,-18220,-18211,-18201,-18184,-18183,   
  42.  
  43. -18181,-18012,-17997,-17988,-17970,-17964,-17961,-17950,-17947,-17931,-17928,-17922,-17759,-17752,-17733,-17730,   
  44.  
  45. -17721,-17703,-17701,-17697,-17692,-17683,-17676,-17496,-17487,-17482,-17468,-17454,-17433,-17427,-17417,-17202,   
  46.  
  47. -17185,-16983,-16970,-16942,-16915,-16733,-16708,-16706,-16689,-16664,-16657,-16647,-16474,-16470,-16465,-16459,   
  48.  
  49. -16452,-16448,-16433,-16429,-16427,-16423,-16419,-16412,-16407,-16403,-16401,-16393,-16220,-16216,-16212,-16205,   
  50.  
  51. -16202,-16187,-16180,-16171,-16169,-16158,-16155,-15959,-15958,-15944,-15933,-15920,-15915,-15903,-15889,-15878,   
  52.  
  53. -15707,-15701,-15681,-15667,-15661,-15659,-15652,-15640,-15631,-15625,-15454,-15448,-15436,-15435,-15419,-15416,   
  54.  
  55. -15408,-15394,-15385,-15377,-15375,-15369,-15363,-15362,-15183,-15180,-15165,-15158,-15153,-15150,-15149,-15144,   
  56.  
  57. -15143,-15141,-15140,-15139,-15128,-15121,-15119,-15117,-15110,-15109,-14941,-14937,-14933,-14930,-14929,-14928,   
  58.  
  59. -14926,-14922,-14921,-14914,-14908,-14902,-14894,-14889,-14882,-14873,-14871,-14857,-14678,-14674,-14670,-14668,   
  60.  
  61. -14663,-14654,-14645,-14630,-14594,-14429,-14407,-14399,-14384,-14379,-14368,-14355,-14353,-14345,-14170,-14159,   
  62.  
  63. -14151,-14149,-14145,-14140,-14137,-14135,-14125,-14123,-14122,-14112,-14109,-14099,-14097,-14094,-14092,-14090,   
  64.  
  65. -14087,-14083,-13917,-13914,-13910,-13907,-13906,-13905,-13896,-13894,-13878,-13870,-13859,-13847,-13831,-13658,   
  66.  
  67. -13611,-13601,-13406,-13404,-13400,-13398,-13395,-13391,-13387,-13383,-13367,-13359,-13356,-13343,-13340,-13329,   
  68.  
  69. -13326,-13318,-13147,-13138,-13120,-13107,-13096,-13095,-13091,-13076,-13068,-13063,-13060,-12888,-12875,-12871,   
  70.  
  71. -12860,-12858,-12852,-12849,-12838,-12831,-12829,-12812,-12802,-12607,-12597,-12594,-12585,-12556,-12359,-12346,   
  72.  
  73. -12320,-12300,-12120,-12099,-12089,-12074,-12067,-12058,-12039,-11867,-11861,-11847,-11831,-11798,-11781,-11604,   
  74.  
  75. -11589,-11536,-11358,-11340,-11339,-11324,-11303,-11097,-11077,-11067,-11055,-11052,-11045,-11041,-11038,-11024,   
  76.  
  77. -11020,-11019,-11018,-11014,-10838,-10832,-10815,-10800,-10790,-10780,-10764,-10587,-10544,-10533,-10519,-10331,   
  78.  
  79. -10329,-10328,-10322,-10315,-10309,-10307,-10296,-10281,-10274,-10270,-10262,-10260,-10256,-10254};  
  80.  
  81.         private static string[] pystr = new string[]{"a","ai","an","ang","ao","ba","bai","ban","bang","bao","bei","ben","beng","bi","bian","biao",   
  82.  
  83. "bie","bin","bing","bo","bu","ca","cai","can","cang","cao","ce","ceng","cha","chai","chan","chang","chao","che","chen",   
  84.  
  85. "cheng","chi","chong","chou","chu","chuai","chuan","chuang","chui","chun","chuo","ci","cong","cou","cu","cuan","cui",   
  86.  
  87. "cun","cuo","da","dai","dan","dang","dao","de","deng","di","dian","diao","die","ding","diu","dong","dou","du","duan",   
  88.  
  89. "dui","dun","duo","e","en","er","fa","fan","fang","fei","fen","feng","fo","fou","fu","ga","gai","gan","gang","gao",   
  90.  
  91. "ge","gei","gen","geng","gong","gou","gu","gua","guai","guan","guang","gui","gun","guo","ha","hai","han","hang",   
  92.  
  93. "hao","he","hei","hen","heng","hong","hou","hu","hua","huai","huan","huang","hui","hun","huo","ji","jia","jian",   
  94.  
  95. "jiang","jiao","jie","jin","jing","jiong","jiu","ju","juan","jue","jun","ka","kai","kan","kang","kao","ke","ken",   
  96.  
  97. "keng","kong","kou","ku","kua","kuai","kuan","kuang","kui","kun","kuo","la","lai","lan","lang","lao","le","lei",   
  98.  
  99. "leng","li","lia","lian","liang","liao","lie","lin","ling","liu","long","lou","lu","lv","luan","lue","lun","luo",   
  100.  
  101. "ma","mai","man","mang","mao","me","mei","men","meng","mi","mian","miao","mie","min","ming","miu","mo","mou","mu",   
  102.  
  103. "na","nai","nan","nang","nao","ne","nei","nen","neng","ni","nian","niang","niao","nie","nin","ning","niu","nong",   
  104.  
  105. "nu","nv","nuan","nue","nuo","o","ou","pa","pai","pan","pang","pao","pei","pen","peng","pi","pian","piao","pie",   
  106.  
  107. "pin","ping","po","pu","qi","qia","qian","qiang","qiao","qie","qin","qing","qiong","qiu","qu","quan","que","qun",   
  108.  
  109. "ran","rang","rao","re","ren","reng","ri","rong","rou","ru","ruan","rui","run","ruo","sa","sai","san","sang",   
  110.  
  111. "sao","se","sen","seng","sha","shai","shan","shang","shao","she","shen","sheng","shi","shou","shu","shua",   
  112.  
  113. "shuai","shuan","shuang","shui","shun","shuo","si","song","sou","su","suan","sui","sun","suo","ta","tai",   
  114.  
  115. "tan","tang","tao","te","teng","ti","tian","tiao","tie","ting","tong","tou","tu","tuan","tui","tun","tuo",   
  116.  
  117. "wa","wai","wan","wang","wei","wen","weng","wo","wu","xi","xia","xian","xiang","xiao","xie","xin","xing",   
  118.  
  119. "xiong","xiu","xu","xuan","xue","xun","ya","yan","yang","yao","ye","yi","yin","ying","yo","yong","you",   
  120.  
  121. "yu","yuan","yue","yun","za","zai","zan","zang","zao","ze","zei","zen","zeng","zha","zhai","zhan","zhang",   
  122.  
  123. "zhao","zhe","zhen","zheng","zhi","zhong","zhou","zhu","zhua","zhuai","zhuan","zhuang","zhui","zhun","zhuo",   
  124.  
  125. "zi","zong","zou","zu","zuan","zui","zun","zuo"};  
  126.  
  127.         /**/  
  128.  
  129.         /// <summary>  
  130.  
  131.         /// 转化汉字的全部拼音  
  132.  
  133.         /// </summary>  
  134.  
  135.         /// <param name="chrstr"></param>  
  136.  
  137.         /// <returns></returns>  
  138.  
  139.         public static string ConvertAllSpell(string chrstr)  
  140.  
  141.         {  
  142.  
  143.             Regex MyRegex = new Regex("^[一-龥]$");  
  144.  
  145.             byte[] array = new byte[2];  
  146.  
  147.             string returnstr = "";  
  148.  
  149.             int chrasc = 0;  
  150.  
  151.             int i1 = 0;  
  152.  
  153.             int i2 = 0;  
  154.  
  155.             char[] nowchar = chrstr.ToCharArray();  
  156.  
  157.             for (int j = 0; j < nowchar.Length; j++)  
  158.  
  159.             {  
  160.  
  161.                 if (MyRegex.IsMatch(nowchar[j].ToString()))  
  162.  
  163.                 {  
  164.  
  165.                     array = System.Text.Encoding.Default.GetBytes(nowchar[j].ToString());  
  166.  
  167.                     i1 = (short)(array[0]);  
  168.  
  169.                     i2 = (short)(array[1]);  
  170.  
  171.                     chrasc = i1 * 256 + i2 - 65536;  
  172.  
  173.                     if (chrasc > 0 && chrasc < 160)  
  174.  
  175.                     {  
  176.  
  177.                         returnstr += nowchar[j];  
  178.  
  179.                     }  
  180.  
  181.                     else 
  182.  
  183.                     {  
  184.  
  185.                         for (int i = (pyvalue.Length - 1); i >= 0; i--)  
  186.  
  187.                         {  
  188.  
  189.                             if (pyvalue[i] <= chrasc)  
  190.  
  191.                             {  
  192.  
  193.                                 returnstr += pystr[i];  
  194.  
  195.                                 break;  
  196.  
  197.                             }  
  198.  
  199.                         }  
  200.  
  201.                     }  
  202.  
  203.                 }  
  204.  
  205.                 else 
  206.  
  207.                 {  
  208.  
  209.                     returnstr += nowchar[j].ToString();  
  210.  
  211.                 }  
  212.  
  213.             }  
  214.  
  215.             return returnstr;  
  216.  
  217.         }  
  218.  
  219.         //ChineseToPY  
  220.  
  221.         /**/  
  222.  
  223.         /// <summary>  
  224.  
  225.         /// 只转换每个汉字首字母(大写)  
  226.  
  227.         /// </summary>  
  228.  
  229.         /// <param name="strText"></param>  
  230.  
  231.         /// <returns></returns>  
  232.  
  233.         public static string GetChineseSpell(string strText)  
  234.  
  235.         {  
  236.  
  237.             int len = strText.Length;  
  238.  
  239.             string myStr = "";  
  240.  
  241.             for (int i = 0; i < len; i++)  
  242.  
  243.             {  
  244.  
  245.                 myStr += getSpell(strText.Substring(i, 1));  
  246.  
  247.             }  
  248.  
  249.             return myStr;  
  250.  
  251.         }  
  252.  
  253.    
  254.  
  255.         /// <summary>  
  256.  
  257.         /// 获得第一个汉字的首字母(大写);  
  258.  
  259.         /// </summary>  
  260.  
  261.         /// <param name="cnChar"></param>  
  262.  
  263.         /// <returns></returns>  
  264.  
  265.         public static string getSpell(string cnChar)  
  266.  
  267.         {  
  268.  
  269.             byte[] arrCN = Encoding.Default.GetBytes(cnChar);  
  270.  
  271.             if (arrCN.Length > 1)  
  272.  
  273.             {  
  274.  
  275.                 int area = (short)arrCN[0];  
  276.  
  277.                 int pos = (short)arrCN[1];  
  278.  
  279.                 int code = (area << 8) + pos;  
  280.  
  281.                 int[] areacode ={ 45217, 45253, 45761, 46318, 46826, 47010, 47297, 47614, 48119, 48119, 49062, 49324, 49896, 50371, 50614, 50622, 50906, 51387, 51446, 52218, 52698, 52698, 52698, 52980, 53689, 54481 };  
  282.  
  283.                 for (int i = 0; i < 26; i++)  
  284.  
  285.                 {  
  286.  
  287.                     int max = 55290;  
  288.  
  289.                     if (i != 25) max = areacode[i + 1];  
  290.  
  291.                     if (areacode[i] <= code && code < max)  
  292.  
  293.                     {  
  294.  
  295.                         return Encoding.Default.GetString(new byte[] { (byte)(65 + i) });  
  296.  
  297.                     }  
  298.  
  299.                 }  
  300.  
  301.                 return "*";  
  302.  
  303.             }  
  304.  
  305.             else return cnChar;  
  306.  
  307.         }  
  308.  
  309.     }  
  310.  
  311. }  
  312.  
  313. 复制代码 

  1. protected virtual void CommitSearchList()  
  2.  
  3.         {  
  4.  
  5.             if (searchList.SelectedIndex > -1)  
  6.  
  7.             {  
  8.  
  9.                 this.Text = searchList.Items[searchList.SelectedIndex].ToString();  
  10.  
  11.                 searchList.Visible = false;  
  12.  
  13.                 this.Focus();  
  14.  
  15.             }  
  16.  
  17.         }  

{

private ListBox searchList;

.....