ComboBox binding with Dictionary. RSS

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  kutabale

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  ComboBox binding with Dictionary.

  Nov 24, 2008 10:20 PM | LINK

  I have a combobox bound to Dictionary<string,string>   with key and value. Display memberpath is set to the value. But i want to store the selected value in the string property in the same dataObject. how can i accomplish this with out firing events.

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  preishuber

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  Re: ComboBox binding with Dictionary.

  Nov 25, 2008 06:52 AM | LINK

  same DataObject? in meaning of Dictionary? where sould be a place to store selected?

  Combobox have selectedvalue

  -Hannes
  
  http://www.ppedv.de
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  Jonathan She...

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  Re: ComboBox binding with Dictionary.

  Nov 29, 2008 03:57 PM | LINK

   Hi Kutabale,

  As far as I know,  there is no direct way to achieve your goal.  Below is the alternative way for your situation.
  

        <ComboBox x:Name="myComboBox" Width="150" Height="30" SelectionChanged="myComboBox_SelectionChanged" DisplayMemberPath="Value" >
             
        </ComboBox>

   

          void Page_Loaded(object sender, RoutedEventArgs e)
          {
              Dictionary<int, string> myDic = new Dictionary<int, string>();
              myDic.Add(1, "itme1");
              myDic.Add(2, "itme2");
              myDic.Add(3, "itme3");
              myComboBox.ItemsSource = myDic;
          }
  
          private void myComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
          {
              KeyValuePair<int, string> curItem =(KeyValuePair<int, string>) myComboBox.SelectedItem;
              MessageBox.Show(curItem.Key.ToString());
          }

    Best regards,

   Jonathan
  

   

  Please mark the replies as answers if they help or unmark if not.
  If you have any feedback about my replies, please contact msdnmg@microsoft.com.
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  Jonathan She...

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  Re: ComboBox binding with Dictionary.

  Dec 01, 2008 01:57 AM | LINK

  Hi all,
  

  Share another sample with our community members.  http://www.silverlightshow.net/items/Silverlight-ComboBox.aspx

  Best regards,

  Jonathan
  

  Please mark the replies as answers if they help or unmark if not.
  If you have any feedback about my replies, please contact msdnmg@microsoft.com.
  Microsoft One Code Framework
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  kutabale

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  Re: ComboBox binding with Dictionary.

  Dec 10, 2008 12:24 AM | LINK

  resolved my problem. by binding the combobox selected item and creating a converter for the selected item Mode=twoWay. My source for the combobox is actually static dictionary so i can have access in the converter. But you can i believe so pass the dictionary source as parameter in the SelecedItem.  evertime i Change the selected i tem will convert it for me.

  <ComboBox x:Name="name" Grid.Column="2" Grid.Row="1" Grid.ColumnSpan="2" DisplayMemberPath="Value" ItemsSource="{Binding Source , Source={StaticResource Source}}" SelectedItem="{Binding object.propertyName,Converter={StaticResource Converter},Mode=TwoWay}">

  public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)

  {

  ComboboxSource source = new ComboBoxSource();  // static source

  string dictonatyValue = string.Empty;

  source.TypeSource.TryGetValue((string)value, out Value);

  KeyValuePair<string, string> item = new KeyValuePair<string, string>((string)value,dictonaryValue );

  return item;

  }

  public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)

  {

  var item = (KeyValuePair<string, string>)value;

  return item.Key;

  }

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  soshekar

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  Re: ComboBox binding with Dictionary.

  Dec 16, 2008 12:57 PM | LINK

  This is very nice approach, i feel very confortable using this piece of code.

  Thanks for this. :)

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  andresguti

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  Re: Re: ComboBox binding with Dictionary.

  Jul 16, 2009 11:18 PM | LINK

  hi

   i have problem whit this code.

  i try to implement this Convert in my project and i have this error.

  Error 6 The name 'dictonaryValue' does not exist in the current context C:\Documents and Settings\Andres G\Mis documentos\Visual Studio 2008\Projects\SITIO_W\SITIO_W\convertidores\comboxconvert.cs 24 97 SITIO_W

  I happens whit the  following statements

  -ComboboxSource

  -Value

  -dictonaryValue

  i could not help me understand a lot of SL3