MVVMLight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); 

         } 

     }