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在窗口中创建一个标准图像控件，并且当用户点击图像时，你还可以隐藏或者显示该控件。网格单元格中的图像应该被绑定在按钮中。这样，你就可以轻松处理Click事件了。
<Window Height="598"
Title="Window1"
Width="811"
x:Class="WpfApplication1.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:dxe="http://schemas.devexpress.com/winfx/2008/xaml/editors"
xmlns:dxg="http://schemas.devexpress.com/winfx/2008/xaml/grid"
xmlns:local="clr-namespace:WpfApplication1"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Grid>
<dxg:GridControl Name="gridControl1">
<dxg:GridControl.Columns>
<dxg:GridColumn FieldName="CategoryID" />
<dxg:GridColumn FieldName="CategoryName" />
<dxg:GridColumn FieldName="Picture" AllowColumnFiltering="False">
<dxg:GridColumn.CellTemplate>
<DataTemplate>
<Button Command="{x:Static local:Window1.ShowImage}">
<Button.Template>
<ControlTemplate TargetType="{x:Type Button}">
<ContentPresenter />
</ControlTemplate>
</Button.Template>
<Image Source="{Binding Path=RowData.Row[Picture]}" HorizontalAlignment="Left" Stretch="None" />
</Button>
</DataTemplate>
</dxg:GridColumn.CellTemplate>
</dxg:GridColumn>
</dxg:GridControl.Columns>
<dxg:GridControl.View>
<dxg:TableView x:Name="view" AutoWidth="True" />
</dxg:GridControl.View>
</dxg:GridControl>
<Image Source="{Binding}" Name="image" Visibility="Hidden" MouseLeave="image_MouseLeave" Margin="30,30,50,12" />
</Grid>
</Window>
<Window Height="598"
Title="Window1"
Width="811"
x:Class="WpfApplication1.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:dxe="http://schemas.devexpress.com/winfx/2008/xaml/editors"
xmlns:dxg="http://schemas.devexpress.com/winfx/2008/xaml/grid"
xmlns:local="clr-namespace:WpfApplication1"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Grid>
<dxg:GridControl Name="gridControl1">
<dxg:GridControl.Columns>
<dxg:GridColumn FieldName="CategoryID" />
<dxg:GridColumn FieldName="CategoryName" />
<dxg:GridColumn FieldName="Picture" AllowColumnFiltering="False">
<dxg:GridColumn.CellTemplate>
<DataTemplate>
<Button Command="{x:Static local:Window1.ShowImage}">
<Button.Template>
<ControlTemplate TargetType="{x:Type Button}">
<ContentPresenter />
</ControlTemplate>
</Button.Template>
<Image Source="{Binding Path=RowData.Row[Picture]}" HorizontalAlignment="Left" Stretch="None" />
</Button>
</DataTemplate>
</dxg:GridColumn.CellTemplate>
</dxg:GridColumn>
</dxg:GridControl.Columns>
<dxg:GridControl.View>
<dxg:TableView x:Name="view" AutoWidth="True" />
</dxg:GridControl.View>
</dxg:GridControl>
<Image Source="{Binding}" Name="image" Visibility="Hidden" MouseLeave="image_MouseLeave" Margin="30,30,50,12" />
</Grid>
</Window>
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