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【原创】Silverlight DataGrid对核心控件DataGrid的任意单元格进行获取和设置分析。

前几天，公司同事有个需求需要对系统中的DataGrid控件的指定单元格(如图，申请人ID)进行禁用设置，尝试了很多次总是整行整列的禁用没实现效果。网上资料较少，没找到解决措施。

尽管silverlight的datagrid控件和 asp.net的名字相同，但很多方面还是不大一样的。

但是换个思维方式，任何事务都是由对象构成，Asp.net中的datagrid的单元格是cell对象，所以 silverlight的单元格应该也是一个对象，一种类型,可以通过一些方法被获取到。

多次尝试后通过以下的代码方案简单明了的找到了目标条件的单元格 DataGridCell对象。

前端xaml代码：

 1 <sdk:DataGrid x:Name="dataGrid" SelectionMode="Single" Grid.Row="1" Margin="-1,-1,-1,0" CopyingRowClipboardContent="dataGrid_CopyingRowClipboardContent"
 2                                       AutoGenerateColumns="False" VerticalContentAlignment="Stretch" Loaded="dataGrid2_Loaded"
 3                                       HorizontalContentAlignment="Stretch" Grid.ColumnSpan="2" CellEditEnded="dataGrid_CellEditEnded"
 4                                       ColumnHeaderStyle="{StaticResource DataGridHeaderStyle}" LoadingRow="dataGrid_LoadingRow" BeginningEdit="dataGrid_BeginningEdit"
 5                                       CurrentCellChanged="dataGrid_CurrentCellChanged">
 6                             <sdk:DataGrid.Columns>
 7                                 <sdk:DataGridTemplateColumn Width="100" Header="查询对象">
 8                                     <sdk:DataGridTemplateColumn.CellTemplate>
 9                                         <DataTemplate>
10                                             <TextBlock Height="20" Margin="2,0" VerticalAlignment="Center" HorizontalAlignment="Left" 
11                                                Text="{Binding QueryType, Converter={StaticResource QueryTypeConverter}, Mode=TwoWay}" />
12                                         </DataTemplate>
13                                     </sdk:DataGridTemplateColumn.CellTemplate>
14                                     <sdk:DataGridTemplateColumn.CellEditingTemplate>
15                                         <DataTemplate>
16                                             <ComboBox ItemsSource="{Binding KeyNameList, Source={StaticResource QueryTypeConverter}}"
17                                                       SelectedItem="{Binding QueryType, Converter={StaticResource QueryTypeConverter}, Mode=TwoWay}"/>
18                                         </DataTemplate>
19                                     </sdk:DataGridTemplateColumn.CellEditingTemplate>
20                                 </sdk:DataGridTemplateColumn>
21                                 <sdk:DataGridTextColumn  Width="0.3*" Header="查询内容" Binding="{Binding Content}"/>
22   
23                                 <sdk:DataGridTemplateColumn Width="70" Header="有无异常">
24                                     <sdk:DataGridTemplateColumn.CellTemplate>
25                                         <DataTemplate>
26                                             <TextBlock Margin="2,0" VerticalAlignment="Center" HorizontalAlignment="Left" 
27                                                Text="{Binding ResultDesc, Converter={StaticResource IsResultDescConverter}, Mode=TwoWay}" />
28                                         </DataTemplate>
29                                     </sdk:DataGridTemplateColumn.CellTemplate>
30                                     <sdk:DataGridTemplateColumn.CellEditingTemplate>
31                                         <DataTemplate>
32                                             <ComboBox ItemsSource="{Binding KeyNameList, Source={StaticResource IsResultDescConverter}}"
33                                                       SelectedItem="{Binding ResultDesc, Converter={StaticResource IsResultDescConverter}, Mode=TwoWay}"
34                                                       Height="25"/>
35                                         </DataTemplate>
36                                     </sdk:DataGridTemplateColumn.CellEditingTemplate>
37                                 </sdk:DataGridTemplateColumn>
38                                 <!--<sdk:DataGridTextColumn Width="0.7*" Header="备注" Binding="{Binding Path=Remark}"/>-->
39                                 <sdk:DataGridTemplateColumn Width="0.7*" Header="备注">
40                                     <sdk:DataGridTemplateColumn.CellTemplate>
41                                         <DataTemplate>
42                                             <TextBlock Text="{Binding Remark}" TextWrapping="Wrap" VerticalAlignment="Center"/>
43                                         </DataTemplate>
44                                     </sdk:DataGridTemplateColumn.CellTemplate>
45                                     <sdk:DataGridTemplateColumn.CellEditingTemplate>
46                                         <DataTemplate>
47                                             <TextBox Text="{Binding Remark, Mode=TwoWay}" AcceptsReturn="True" TextWrapping="Wrap"/>
48                                         </DataTemplate>
49                                     </sdk:DataGridTemplateColumn.CellEditingTemplate>
50                                 </sdk:DataGridTemplateColumn>
51                                 <sdk:DataGridTemplateColumn Width="45"  Header="操作">
52                                     <sdk:DataGridTemplateColumn.CellTemplate>
53                                         <DataTemplate>
54                                             <StackPanel Orientation="Horizontal" Height="22">
55                                                 <Image x:Name="btnAdd" ToolTipService.ToolTip="新增" MouseLeftButtonUp="btnAdd_MouseLeftButtonUp" Source="/CTOP2P;component/Assets/Image/Action_LinkUnlink_Link.png" Style="{StaticResource imgButton}"/>
56                                                 <Image x:Name="btnCopy" Visibility="Collapsed" ToolTipService.ToolTip="复制" MouseLeftButtonUp="btnCopy_MouseLeftButtonUp" Source="/CTOP2P;component/Assets/Image/Action_Copy.png" Style="{StaticResource imgButton}"/>
57                                                 <Image x:Name="btnDel" ToolTipService.ToolTip="删除" MouseLeftButtonUp="btnDel_MouseLeftButtonUp" Cursor="Hand" Source="/CTOP2P;component/Assets/Image/Action_Delete_12x12.png" Height="12" Width="12" Margin="2,0"/>
58                                             </StackPanel>
59                                         </DataTemplate>
60                                     </sdk:DataGridTemplateColumn.CellTemplate>
61                                 </sdk:DataGridTemplateColumn>
62                             </sdk:DataGrid.Columns>
63                         </sdk:DataGrid>

View Code

需要设置dataGrid_BeginningEdit事件。

后端代码：

private void dataGrid_BeginningEdit(object sender, DataGridBeginningEditEventArgs e) {
            var item = e.Row.DataContext as AuditQueryInfo;
            if (item.QueryType.Equals("申请人ID")) {

                var dataGrid = sender as DataGrid;

                FrameworkElement fe = dataGrid.Columns[1].GetCellContent(item);
                if (fe == null)
                    return;
               FrameworkElement result = GetParent(fe, typeof(DataGridCell));

                if (fe != null) {
                    DataGridCell cell = (DataGridCell)result;

                    cell.Foreground = new SolidColorBrush(Colors.Green);
                    cell.IsEnabled = false; 
                }
            }
        }

View Code

private FrameworkElement GetParent(FrameworkElement child, Type targetType) {

            object parent = child.Parent;
            if (parent != null) {
                if (parent.GetType() == targetType) {
                    return (FrameworkElement)parent;
                } else {
                    return GetParent((FrameworkElement)parent, targetType);
                }
            }
            return null;
        }

这样就能对指定条件的单元格进行获取操作了。