系统日志2-日志查询

第一步：设计界面如下代码：

<Window x:Class="HRMSys.UI.SystemMgr.OperationLogWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
   Title="OperationLogWindow" Height="800" Width="600" Loaded="Window_Loaded">
    <Grid>
        <DockPanel>
            <GroupBox Height="100" Header="搜索条件" DockPanel.Dock="Top">
                <Grid>
                    <CheckBox Content="操作员" Height="16" HorizontalAlignment="Left" Margin="6,6,0,0" Name="cbSearchByOperator" VerticalAlignment="Top" />
                    <CheckBox Content="操作日期" Height="16" HorizontalAlignment="Left" Margin="198,6,0,0" Name="cbSearchByMakeDate" VerticalAlignment="Top" />
                    <CheckBox Content="操作描述" Height="16" HorizontalAlignment="Left" Margin="11,45,0,0" Name="cbSearchByAction" VerticalAlignment="Top" />
                    <ComboBox DisplayMemberPath="UserName" SelectedValuePath="Id" Height="23" HorizontalAlignment="Left" Margin="72,6,0,0" Name="cmbOperator" VerticalAlignment="Top" Width="106" />
                    <DatePicker Height="25" HorizontalAlignment="Left" Margin="272,4,0,0" Name="dpBeginDate" VerticalAlignment="Top" Width="115" />
                    <DatePicker Height="25" HorizontalAlignment="Left" Margin="445,4,0,0" Name="dpEndDate" VerticalAlignment="Top" Width="115" />
                    <TextBlock Height="23" HorizontalAlignment="Left" Margin="398,5,0,0" Name="textBlock1" Text="到" VerticalAlignment="Top" />
                    <TextBox Height="23" HorizontalAlignment="Left" Margin="95,38,0,0" Name="txtAcionDesc" VerticalAlignment="Top" Width="120" />
                    <Button Content="搜索" Height="23" HorizontalAlignment="Left" Margin="264,38,0,0" Name="btnSearch" VerticalAlignment="Top" Width="75" Click="btnSearch_Click" />
                </Grid>
            </GroupBox>
            <DataGrid DockPanel.Dock="Top" Name="datagrid" IsReadOnly="True" AutoGenerateColumns="False">
                <DataGrid.Columns>
                    <DataGridComboBoxColumn Header="操作员" SelectedValueBinding="{Binding OperatorId}"
                                            SelectedValuePath="Id"
                                            DisplayMemberPath="UserName" x:Name="colOperator"></DataGridComboBoxColumn>
                    <DataGridTextColumn Header="日期" Binding="{Binding MakeDate}"></DataGridTextColumn>
                    <DataGridTextColumn Header="说明" Binding="{Binding ActionDesc}"></DataGridTextColumn>
                </DataGrid.Columns>
            </DataGrid>
        </DockPanel>
    </Grid>
</Window>