将控件传入ViewModel的方法

<Window x:Class="AE240_Simulator.View.LogView"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:AE240_Simulator.View"
        mc:Ignorable="d"
        Title="Log分析工具" Height="450" 
        Width="800" 
        WindowStartupLocation="CenterScreen" 
        WindowState="Maximized"
        DataContext="{Binding Source={StaticResource Locator}, Path=LogVM}"
        xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"   
        xmlns:command="clr-namespace:GalaSoft.MvvmLight.Command;assembly=GalaSoft.MvvmLight.Platform" 
        >

    <i:Interaction.Triggers>
        <i:EventTrigger EventName="Loaded">
            <command:EventToCommand Command="{Binding LoadCommand}"   
                                    CommandParameter="{Binding ElementName=dgFormula}"                                    
                                    >
            </command:EventToCommand>
        </i:EventTrigger>

        <i:EventTrigger EventName="Loaded">
            <command:EventToCommand Command="{Binding LoadPopupChoiceCommand}"   
                                    CommandParameter="{Binding ElementName=popChioce}"                                    
                                    >
            </command:EventToCommand>
        </i:EventTrigger>

        <i:EventTrigger EventName="Loaded">
            <command:EventToCommand Command="{Binding LoadPopupLoadingCommand}"   
                                    CommandParameter="{Binding ElementName=popLoading}"                                    
                                    >
            </command:EventToCommand>
        </i:EventTrigger>

    </i:Interaction.Triggers>