AutoComplete TextBox in WPF

Question

Is it possible to make a textbox autocomplete in WPF    I found a sample where a combo box is used and the triangle is removed by editing the style template   Is there a better solution

User · Answer

I have published a WPF Auto Complete Text Box in WPF at CodePlex com  You can download and try it from https   wpfautocomplete codeplex com

User · Answer

Nimgoble s is the version I used in 2015  Thought I d put it here as this question was top of the list in google for  wpf autocomplete textbox    Install nuget package for project in Visual Studio Add a reference to the library in the xaml  xmlns behaviors  clr-namespace WPFTextBoxAutoComplete assembly WPFTextBoxAutoComplete  Create a textbox and bind the AutoCompleteBehaviour to List lt String gt   TestItems    lt TextBox Text   Binding TestText  UpdateSourceTrigger PropertyChanged   behaviors AutoCompleteBehavior AutoCompleteItemsSource   Binding TestItems     gt    IMHO this is much easier to get started and manage than the other options listed above

User · Answer

If you have a small number of values to auto complete  you can simply add them in xaml  Typing will invoke auto-complete  plus you have dropdowns too    lt ComboBox Text   Binding CheckSeconds  UpdateSourceTrigger PropertyChanged             IsEditable  True  gt       lt ComboBoxItem Content  60   gt       lt ComboBoxItem Content  120   gt       lt ComboBoxItem Content  180   gt       lt ComboBoxItem Content  300   gt       lt ComboBoxItem Content  900   gt   lt  ComboBox gt

User · Answer

I know this is a very old question but I want to add an answer I have come up with   First you need a handler for your normal TextChanged event handler for the TextBox   private bool InProg  internal void TBTextChanged object sender  TextChangedEventArgs e                            var change   e Changes FirstOrDefault                if    InProg                                     InProg   true                  var culture   new CultureInfo CultureInfo CurrentCulture Name                   var source      TextBox sender                        if       change AddedLength - change RemovedLength    gt  0    source Text Length  gt  0    amp  amp   DelKeyPressed                                                      if   Files Where x   gt  x IndexOf source Text  StringComparison CurrentCultureIgnoreCase     0   Count    gt  0                                                             var  appendtxt   Files FirstOrDefault ap   gt    culture CompareInfo IndexOf ap  source Text  CompareOptions IgnoreCase     0                                  appendtxt    appendtxt Remove 0  change Offset   1                               source Text     appendtxt                              source SelectionStart   change Offset   1                              source SelectionLength   source Text Length                                                                          InProg   false                                    Then make a simple PreviewKeyDown handler       private static bool DelKeyPressed      internal static void DelPressed object sender  KeyEventArgs e        if   e Key    Key Back     DelKeyPressed   true    else   DelKeyPressed   false        In this example  Files  is a list of directory names created on application startup   Then just attach the handlers   public class YourClass       public YourClass             YourTextbox PreviewKeyDown    DelPressed      YourTextbox TextChanged    TBTextChanged              With this whatever you choose to put in the List will be used for the autocomplete box  This may not be a great option if you expect to have an enormous list for the autocomplete but in my app it only ever sees 20-50 items so it cycles through very quick

User · Answer

and here the fork of the toolkit wich contains the port to 4 O   https   github com jogibear9988 wpftoolkit  it s worked very well to me

User · Answer

I m surprised why no one suggested to use the WinForms Textbox  XAML        lt WindowsFormsHost  Margin  quot 10 quot  Width  quot 70 quot  gt           lt wf TextBox x Name  quot textbox1 quot   gt        lt  WindowsFormsHost gt   Also don t forget the Winforms Namespace  xmlns wf  quot clr-namespace System Windows Forms assembly System Windows Forms quot   C        AutoCompleteStringCollection stringCollection   new AutoCompleteStringCollection    quot String 1 quot    quot String 2 quot    quot etc    quot             textbox1 AutoCompleteMode   AutoCompleteMode SuggestAppend       textbox1 AutoCompleteSource   AutoCompleteSource CustomSource       textbox1 AutoCompleteCustomSource   stringCollection   With Autocomplete  you need to do it in the Code behind  because for some reasons  others might can explain  it throws an exception

User · Answer

or you can add the AutoCompleteBox into the toolbox by clicking on it and then Choose Items  go to WPF Components  type in the filter AutoCompleteBox  which is on the System Windows Controls namespace and the just drag into your xaml file  This is way much easier than doing these other stuff  since the AutoCompleteBox is a native control

User · Answer

You can find one in the WPF Toolkit  which is also available via NuGet   This article demos how to create a textbox which can auto-suggest items at runtime based on input  in this case  disk drive folders   WPF AutoComplete Folder TextBox   Also take a look at this nice Reusable WPF Autocomplete TextBox  it was for me very usable

[wpf] AutoComplete TextBox in WPF

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