MVVM-Light模式，在dataGrid的模板下，绑定事件不触发的原因已经服务端排序的实现

如果按以下绑定，DataGrid 模板里的Radio 的绑定事件将不会被触发：

< sdk:DataGrid Grid.Column = "0" x:Name = "dataGrid" IsReadOnly = "True"  AutoGenerateColumns = "False"  Width = "auto" Height = "auto" HorizontalAlignment = "Left" VerticalAlignment = "Top"
                             ItemsSource = "{Binding NoticeCollection,Mode=TwoWay}" IsTabStop = "False" Style = "{StaticResource DataGridStyle}"  ColumnHeaderStyle = "{StaticResource DataGridColumnHeaderStyle}"  RowStyle = "{StaticResource DataGridRowStyle}" >
                       < i:Interaction.Triggers >
                           < i:EventTrigger  EventName = "MouseLeftButtonDown" >
                               < ei:CallMethodAction  MethodName = "DatagridMouseLeftButtonDown" TargetObject = "{Binding}" >
                               </ ei:CallMethodAction >
                           </ i:EventTrigger >
                       </ i:Interaction.Triggers >
                       < sdk:DataGrid.Columns >
                           < sdk:DataGridTemplateColumn Header = "选项" Width = "0.1*" >
                               < sdk:DataGridTemplateColumn.CellTemplate >
                                   < DataTemplate >
                                       < StackPanel HorizontalAlignment = "Center" VerticalAlignment = "Top" Margin = "0,7,0,0" >
                                           < RadioButton  GroupName = "sel" Command = "{Binding MessageSelected}" CommandParameter = "{Binding Id,Mode=OneWay}" ></ RadioButton >
                                       </ StackPanel >
                                   </ DataTemplate >
                               </ sdk:DataGridTemplateColumn.CellTemplate >
                           </ sdk:DataGridTemplateColumn >
                           < sdk:DataGridTemplateColumn Header = "标题"  Width = "0.3*" >
                               < sdk:DataGridTemplateColumn.CellTemplate >
                                   < DataTemplate >
                                       < StackPanel HorizontalAlignment = "Left" VerticalAlignment = "Top" Margin = "0,7,0,0" >
                                           < HyperlinkButton  Content = "{Binding Title,Mode=OneWay}" Style = "{StaticResource PageHyperlinkButtonStyle}"  Command = "{Binding Source={StaticResource Locator},Path=NoticeListViewModelStatic.ViewMsgCommand}" CommandParameter = "{Binding Id,Mode=OneWay}" />
                                       </ StackPanel >
                                   </ DataTemplate >
                               </ sdk:DataGridTemplateColumn.CellTemplate >
                           </ sdk:DataGridTemplateColumn >
                           < sdk:DataGridTextColumn Header = "信息内容" Width = "0.4*" Binding = "{Binding Content,Mode=OneWay}" ></ sdk:DataGridTextColumn >
                           <!--<sdk:DataGridTextColumn Header="创建时间"   Width="0.2*" Binding="{Binding CreateTime,Mode=OneWay,StringFormat='yyy-MM-dd HH:mm'}"></sdk:DataGridTextColumn>-->
                           < sdk:DataGridTemplateColumn Header = "创建时间" Width = "0.2*" >
                               < sdk:DataGridTemplateColumn.CellTemplate >
                                   < DataTemplate >
                                       < StackPanel HorizontalAlignment = "Center" VerticalAlignment = "Top" Margin = "0,7,0,0" >
                                           < TextBlock Text = "{Binding CreateTime,Mode=OneWay,StringFormat='yyy-MM-dd HH:mm'}" />
                                       </ StackPanel >
                                   </ DataTemplate >
                               </ sdk:DataGridTemplateColumn.CellTemplate >
                           </ sdk:DataGridTemplateColumn >
                       </ sdk:DataGrid.Columns >
                   </ sdk:DataGrid >

原因是DataGrid.Columns 不是依赖属性，所有绑定的dataContext将会丢失，所有可以用element-to-element的数据绑定来解决此问题

< sdk:DataGrid Grid.Column = "0" x:Name = "dataGrid" IsReadOnly = "True"  AutoGenerateColumns = "False"  Width = "auto" Height = "auto" HorizontalAlignment = "Left" VerticalAlignment = "Top"
                    ItemsSource = "{Binding NoticeCollection,Mode=TwoWay}" IsTabStop = "False" Style = "{StaticResource DataGridStyle}"  ColumnHeaderStyle = "{StaticResource DataGridColumnHeaderStyle}"  RowStyle = "{StaticResource DataGridRowStyle}" >
              < i:Interaction.Triggers >
                  < i:EventTrigger  EventName = "MouseLeftButtonDown" >
                      < ei:CallMethodAction  MethodName = "DatagridMouseLeftButtonDown" TargetObject = "{Binding}" >
                      </ ei:CallMethodAction >
                  </ i:EventTrigger >
              </ i:Interaction.Triggers >
              < sdk:DataGrid.Columns >
                  < sdk:DataGridTemplateColumn Header = "选项" Width = "0.1*" >
                      < sdk:DataGridTemplateColumn.CellTemplate >
                          < DataTemplate >
                              < StackPanel HorizontalAlignment = "Center" VerticalAlignment = "Top" Margin = "0,7,0,0" >
                                  < RadioButton  GroupName = "sel" Command = "{Binding Source={StaticResource Locator},Path=NoticeListViewModelStatic.MessageSelected}" CommandParameter = "{Binding Id,Mode=OneWay}" ></ RadioButton >
                              </ StackPanel >
                          </ DataTemplate >
                      </ sdk:DataGridTemplateColumn.CellTemplate >
                  </ sdk:DataGridTemplateColumn >
                  < sdk:DataGridTemplateColumn Header = "标题"  Width = "0.3*" >
                      < sdk:DataGridTemplateColumn.CellTemplate >
                          < DataTemplate >
                              < StackPanel HorizontalAlignment = "Left" VerticalAlignment = "Top" Margin = "0,7,0,0" >
                                  < HyperlinkButton  Content = "{Binding Title,Mode=OneWay}" Style = "{StaticResource PageHyperlinkButtonStyle}"  Command = "{Binding Source={StaticResource Locator},Path=NoticeListViewModelStatic.ViewMsgCommand}" CommandParameter = "{Binding Id,Mode=OneWay}" />
                              </ StackPanel >
                          </ DataTemplate >
                      </ sdk:DataGridTemplateColumn.CellTemplate >
                  </ sdk:DataGridTemplateColumn >
                  < sdk:DataGridTextColumn Header = "信息内容" Width = "0.4*" Binding = "{Binding Content,Mode=OneWay}" ></ sdk:DataGridTextColumn >
                  <!--<sdk:DataGridTextColumn Header="创建时间"   Width="0.2*" Binding="{Binding CreateTime,Mode=OneWay,StringFormat='yyy-MM-dd HH:mm'}"></sdk:DataGridTextColumn>-->
                  < sdk:DataGridTemplateColumn Header = "创建时间" Width = "0.2*" >
                      < sdk:DataGridTemplateColumn.CellTemplate >
                          < DataTemplate >
                              < StackPanel HorizontalAlignment = "Center" VerticalAlignment = "Top" Margin = "0,7,0,0" >
                                  < TextBlock Text = "{Binding CreateTime,Mode=OneWay,StringFormat='yyy-MM-dd HH:mm'}" />
                              </ StackPanel >
                          </ DataTemplate >
                      </ sdk:DataGridTemplateColumn.CellTemplate >
                  </ sdk:DataGridTemplateColumn >
              </ sdk:DataGrid.Columns >
          </ sdk:DataGrid >

顺便提一下，silverlight的dataGrid在MVVM模式下的排序事件实现：

在View里声明出发前：

< i:Interaction.Triggers >
                          < i:EventTrigger  EventName = "MouseLeftButtonDown" >
                              < ei:CallMethodAction  MethodName = "DatagridMouseLeftButtonDown" TargetObject = "{Binding}" >
                              </ ei:CallMethodAction >
                          </ i:EventTrigger >
                      </ i:Interaction.Triggers >

在ViewModel里实现方法：

public void DatagridMouseLeftButtonDown( object sender, MouseButtonEventArgs e)
    {
        var u =
            from element in VisualTreeHelper.FindElementsInHostCoordinates(e.GetPosition( null ), sender as UIElement)
            where element is DataGridColumnHeader
            select element;
        if (u.Count() == 1)
        {
            e.Handled = true ;
            var columnTag = ConvertColumnName(((DataGridColumnHeader)u.Single()).Content.ToString());
            if ( string .IsNullOrEmpty(columnTag) || columnTag == "Serial" || columnTag == "Do" )
                return ;
            Ascning = (OrderColumn == columnTag) && !Ascning;
            OrderColumn = columnTag;
            PagerInfo p = new PagerInfo();
            p.PageSize = this ._pagesize;
            p.PageIndex = 1;
            this .PagerContext.MoveToFirstPage();
            SortType = Ascning ? "ASC" : "DESC" ;
            searchData(p, OrderColumn, SortType);
        }
    }