Selectionchanged event firing for every row

Selectionchanged event firing for every row

I am using a cascading comboboxes inside datagrid.I am able to get the datas based on selectionchanged but that event is firing for every row. Here is my code:

<sdk:datagridtemplatecolumn header="Category" width="110">      <sdk:datagridtemplatecolumn.celltemplate>         <datatemplate>                                                 <combobox foreground="Black" height="30" isenabled="{Binding Source={StaticResource EffortViewModel}, Path=ComboBoxStatus}" itemssource="{Binding Source={StaticResource EffortViewModel},Path=ProjTypeTaskCtry}" displaymemberpath="TaskCtgyName" selectedvaluepath="TaskCtgy_FK" selectedvalue="{Binding Source={StaticResource EffortViewModel}, Path=TaskCtgy_FKField,Mode=TwoWay}" />         </datatemplate>     </sdk:datagridtemplatecolumn.celltemplate> </sdk:datagridtemplatecolumn>  <sdk:datagridtemplatecolumn header="SubCategory" width="110">      <sdk:datagridtemplatecolumn.celltemplate>         <datatemplate>             <combobox foreground="Black" height="30" isenabled="{Binding Source={StaticResource EffortViewModel}, Path=ComboBoxStatus}" itemssource="{Binding Source={StaticResource EffortViewModel},Path=SubCtry,Mode=OneWay}" displaymemberpath="TaskSubCtgyName" selectedvaluepath="{Binding TaskSubCtgy_PK, Mode=TwoWay}" selectedvalue="{Binding TaskSubCtgy_FKField,Mode=OneTime}" selectedindex="{Binding TaskSubCtgy_FKField}" />          </datatemplate>     </sdk:datagridtemplatecolumn.celltemplate> </sdk:datagridtemplatecolumn> 

Answers & Comments...

Answer: 1

I had the same problem in Silverlight MVVM. I found a solution for this from somewhere. Hope this will help you.

namespace Test {       public class ComboBoxSelectionChange : TriggerAction<DependencyObject>          {            public ComboBoxSelectionChange()             {             }        public ComboBox DayComboBox        {          get { return (ComboBox)GetValue(DayComboBoxProperty); }          set { SetValue(DayComboBoxProperty, value); }         }           public static readonly DependencyProperty DayComboBoxProperty =                          DependencyProperty.Register("DayComboBox",                          typeof(ComboBox),                          typeof(ComboBoxSelectionChange),                          new PropertyMetadata(null, OnDayComboBoxPropertyChanged));         private static void OnDayComboBoxPropertyChanged(DependencyObjectd, DependencyPropertyChangedEventArgs e)           {              var source = d as ComboBoxSelectionChange;              if (source != null)               {                 var value = (ComboBox)e.NewValue;               }           }         protected override void Invoke(object o)          {             if (this.DayComboBox != null)               {                 //this method will execute when the selection is changed               }          }       }  } 

Use the Test namespace in Usercontrol assembly

  xmlns:Common="clr-namespace:Test"    <UserControl.Resources>         <Common:ComboBoxSelectionChange x:Name="ComboBoxItem"/>   </UserControl.Resources>        <DataTemplate x:Key="EditMondayDataTemplate">         <ComboBox x:Name="cmbMonday" Height="26" Margin="3" ItemsSource="{Binding Monday,Mode=OneTime}" DisplayMemberPath="displayText" SelectedItem="{Binding Path=MonSelected,Mode=TwoWay}" HorizontalAlignment="Center" VerticalAlignment="Center" Width="80">             <i:Interaction.Triggers>                   <i:EventTrigger EventName="SelectionChanged">                         <Common:ComboBoxSelectionChange DayComboBox="{Binding ElementName=cmbMonday}" TextParam="Monday"/>                   </i:EventTrigger>             </i:Interaction.Triggers>         </ComboBox>              </DataTemplate> 

by : Sameerahttp://stackoverflow.com/users/1592350

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