AutoCompleteBox.ValueMemberPath Property


Gets or sets the property path that is used to get the value for display in the text box portion of the AutoCompleteBox control, and to filter items for display in the drop-down.

Namespace:  System.Windows.Controls
Assembly:  System.Windows.Controls.Input (in System.Windows.Controls.Input.dll)

public string ValueMemberPath { get; set; }
<sdk:AutoCompleteBox ValueMemberPath="path"/>

XAML Values


A property path. See Remarks.

Property Value

Type: System.String
The property path that is used to get values for display in the text box portion of the AutoCompleteBox control, and to filter items for display in the drop-down.

The AutoCompleteBox uses the ValueMemberPath property to determine where to retrieve values from for comparison to user-entered text. The control displays the filtered values in the drop-down portion of the control. When an item is selected, the ValueMemberPath determines which property value is displayed in the text box.

If you set ValueMemberPath to something other than a string, an object-to-string conversion is attempted by calling to ToString method of the specified type. If ToString does not yield the desired results, and you do not have access to the type to override the ToString method, you should use the ValueMemberBinding property, specifying a Converter for the binding.

To customize the items displayed in the drop-down portion of the AutoCompleteBox, you should specify an ItemTemplate in addition to setting the ValueMemberPath property.

The following example shows how to use the ValueMemberPath and FilterMode properties to populate the drop-down portion of the AutoCompleteBox control.

Run this sample

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Windows.Data;
using System.Collections;

namespace ACBValueMemberPath
    public partial class MainPage : UserControl
        List<Recording> MyMusic = new List<Recording>();
        public MainPage()
            // Add items to the collection.
            MyMusic.Add(new Recording("Chris Sells", "Chris Sells Live",
                new DateTime(2008, 3, 5)));
            MyMusic.Add(new Recording("Chris Sells", "Sells Tells",
               new DateTime(2004, 4, 6)));
            MyMusic.Add(new Recording("Luka Abrus",
                "The Road to Redmond", new DateTime(2007, 8, 3)));
            MyMusic.Add(new Recording("Luka Abrus",
                "Luka", new DateTime(2005, 12, 8)));
            MyMusic.Add(new Recording("Luka Abrus",
               "Love and Luka", new DateTime(2005, 12, 8)));
            MyMusic.Add(new Recording("Jim Hance",
                "The Best of Jim Hance", new DateTime(2007, 2, 6)));

            // Set the data context for the AutoCompleteBox.
            myACB.DataContext = MyMusic;

    // Simple business object.
    public class Recording
        public Recording() { }
        public Recording(string artistName, string cdName, DateTime release)
            Artist = artistName;
            Name = cdName;
            ReleaseDate = release;
        public string Artist { get; set; }
        public string Name { get; set; }
        public DateTime ReleaseDate { get; set; }

<!-- NOTE: 
  By convention, the sdk prefix indicates a URI-based XAML namespace declaration 
  for Silverlight SDK client libraries. This namespace declaration is valid for 
  Silverlight 4 only. In Silverlight 3, you must use individual XAML namespace 
  declarations for each CLR assembly and namespace combination outside the scope 
  of the default Silverlight XAML namespace. For more information, see the help 
  topic "Prefixes and Mappings for Silverlight Libraries". 
<UserControl xmlns:sdk=""
    Width="400" Height="413">
    <StackPanel x:Name="LayoutRoot" Background="White" >
        <StackPanel Orientation="Horizontal">
         <TextBlock Margin="5" Text="Enter a recording name:" TextWrapping="Wrap" />
            <sdk:AutoCompleteBox FilterMode="ContainsOrdinal" VerticalAlignment="Top" Margin="5" Width="170" 
                Height="30" x:Name="myACB" 
                        <TextBlock Text="{Binding Path=Name}"  />
                        <TextBlock Text="{Binding Path=Artist}"  />


Supported in: 5, 4, 3

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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