c# - Customize TextBox autocomplete -

how change autocomplete on textbox? want when type string, box suggest items containing string instead of starting with.

my code is:

class myclass {     private autocompletestringcollection autocompletelist = new autocompletestringcollection();      public myclass()     {         initializecomponent();          autocompletelist.addrange(listnames.select(x=>x.name).toarray());         textboxname.autocompletecustomsource = autocompletelist;         textboxname.autocompletesource = autocompletesource.customsource;         textboxname.autocompletemode = autocompletemode.suggest;         textboxname.keydown += textboxtextname_keydown;     }         private void textboxclient_keydown(object sender, keyeventargs e)     {         if (e.keydata == keys.enter)         {             this.name = (sender textbox).text;         }     }      } 

what want:

looking @ code have need 1 line of code. line is:

this work if start of string entered

//suggestion textboxname.autocompletemode = autocompletemode.suggest; //suggest , autocomplete textboxname.autocompletemode = autocompletemode.suggestappend; 

this work contains method works custom control

you can make custom textbox control fits needs.
custom textbox class:

public class autocompletetextbox : textbox {     private listbox _listbox;     private bool _isadded;     private string[] _values;     private string _formervalue = string.empty;      public autocompletetextbox()     {         initializecomponent();         resetlistbox();     }      private void initializecomponent()     {         _listbox = new listbox();         this.keydown += this_keydown;         this.keyup += this_keyup;     }      private void showlistbox()     {         if (!_isadded)         {             parent.controls.add(_listbox);             _listbox.left = left;             _listbox.top = top + height;             _isadded = true;         }         _listbox.visible = true;         _listbox.bringtofront();     }      private void resetlistbox()     {         _listbox.visible = false;     }      private void this_keyup(object sender, keyeventargs e)     {         updatelistbox();     }      private void this_keydown(object sender, keyeventargs e)     {         switch (e.keycode)         {             case keys.enter:             case keys.tab:             {                 if (_listbox.visible)                 {                     text = _listbox.selecteditem.tostring();                     resetlistbox();                     _formervalue = text;                     this.select(this.text.length, 0);                     e.handled = true;                 }                 break;             }             case keys.down:             {                 if ((_listbox.visible) && (_listbox.selectedindex < _listbox.items.count - 1))                     _listbox.selectedindex++;                     e.handled = true;                     break;                 }                 case keys.up:                 {                     if ((_listbox.visible) && (_listbox.selectedindex > 0))                         _listbox.selectedindex--;                     e.handled = true;                     break;                 }               }         }          protected override bool isinputkey(keys keydata)         {             switch (keydata)             {                 case keys.tab:                     if (_listbox.visible)                         return true;                     else                         return false;                 default:                     return base.isinputkey(keydata);             }         }          private void updatelistbox()         {             if (text == _formervalue)                 return;              _formervalue = this.text;             string word = this.text;              if (_values != null && word.length > 0)             {                 string[] matches = array.findall(_values,                     x => (x.tolower().contains(word.tolower())));                 if (matches.length > 0)                 {                     showlistbox();                     _listbox.beginupdate();                     _listbox.items.clear();                     array.foreach(matches, x => _listbox.items.add(x));                     _listbox.selectedindex = 0;                     _listbox.height = 0;                     _listbox.width = 0;                     focus();                     using (graphics graphics = _listbox.creategraphics())                     {                         (int = 0; < _listbox.items.count; i++)                         {                             if (i < 20)                             _listbox.height += _listbox.getitemheight(i);                         // item width larger current 1                         // set new max item width                         // getitemrectangle not work me                         // add little space using '_'                         int itemwidth = (int)graphics.measurestring(((string)_listbox.items[i]) + "_", _listbox.font).width;                         _listbox.width = (_listbox.width < itemwidth) ? itemwidth : this.width; ;                     }                 }                 _listbox.endupdate();             }             else             {                 resetlistbox();             }         }         else         {             resetlistbox();         }     }      public string[] values     {                 {             return _values;         }         set         {             _values = value;         }     }      public list<string> selectedvalues     {                 {             string[] result = text.split(new[] { ' ' }, stringsplitoptions.removeemptyentries);             return new list<string>(result);         }     } } 

usage:

string[] namearray = { "name1", "name2", "name3", "bla name" }; autocompletetextbox tb = new autocompletetextbox(); tb.values = namearray; tb.location = new point(10,10); tb.size = new size(25,75); this.controls.add( tb ); 

i got code custom control from: so question - autocomplete contains