wpf TabControl TabItem 被点击信息

<TabItem>
<TabItem.Header>
<Label Content="账户信息" HorizontalAlignment="Stretch" MouseLeftButtonUp="TabItemHeader_ClientInfo_MouseLeftButtonUp" />
</TabItem.Header>
<DataGrid x:Name="datagridClientInfo" CanUserAddRows="False" AutoGenerateColumns="False">
<DataGrid.Columns>
<DataGridTextColumn Header="用户名"  Binding="{Binding ClientName}"/>
<DataGridTextColumn Header="上日结存" Binding="{Binding 上日结存}"/>
<DataGridTextColumn Header="买入冻结" Binding="{Binding 买入冻结}"/>
<DataGridTextColumn Header="卖出冻结" Binding="{Binding 卖出冻结}"/>
<DataGridTextColumn Header="买入保证金" Binding="{Binding 买入保证金}">
<DataGridTextColumn.CellStyle>
<Style TargetType="{x:Type DataGridCell}">
<Setter Property="Background" Value="Tomato"/>
</Style>
</DataGridTextColumn.CellStyle>
</DataGridTextColumn>
<DataGridTextColumn Header="卖出保证金" Binding="{Binding 卖出保证金}">
<DataGridTextColumn.CellStyle>
<Style TargetType="{x:Type DataGridCell}">
<Setter Property="Background" Value="PaleGreen"/>
</Style>
</DataGridTextColumn.CellStyle>
</DataGridTextColumn>
<DataGridTextColumn Header="盈利" Binding="{Binding 盈利}"/>
<DataGridTextColumn Header="亏损" Binding="{Binding 亏损}"/>
<DataGridTextColumn Header="可用资金" Binding="{Binding 可用资金}"/>
<DataGridTextColumn Header="动态权益" Binding="{Binding 动态权益}">
<DataGridTextColumn.CellStyle>
<Style TargetType="{x:Type DataGridCell}">
<Setter Property="Background" Value="{Binding 动态权益, Converter={StaticResource PositiveNegativeColorConver}}"/>
</Style>
</DataGridTextColumn.CellStyle>
</DataGridTextColumn>
<DataGridTextColumn Header="动态风险" Binding="{Binding 动态风险}"/>
<DataGridTextColumn Header="风险级别" Binding="{Binding 风险级别}"/>
<DataGridTextColumn Header="手续费" Binding="{Binding 手续费}"/>
<DataGridTextColumn Header="浮动盈亏" Binding="{Binding 浮动盈亏}"/>
<DataGridTextColumn Header="平仓盈亏" Binding="{Binding 平仓盈亏}"/>
<DataGridTextColumn Header="当日出入金" Binding="{Binding 当日出入金}"/>
<DataGridTextColumn Header="总保证金" Binding="{Binding 总保证金}"/>
<DataGridTextColumn Header="质押金额" Binding="{Binding 质押金额}"/>
<DataGridTextColumn Header="动态风险" Binding="{Binding 动态风险}"/>
<DataGridTextColumn Header="交易所风险度" Binding="{Binding 交易所风险度}" Width="*"/>
</DataGrid.Columns>
</DataGrid>
</TabItem>