silverlight IValueConverter

在给datagrid绑定数据的时候 要根据行信息  来控制某一行是否可见  行对象的一个属性为bool类型  根据它来控制的时候 用到了 转换

 

 <uwayG:UwayDataGrid  AutoGenerateColumns="False" Grid.ColumnSpan="5"  IsReadOnly="True"  Grid.Row="5"  Grid.Column="5" 
                             x:Name="gridFormulas"  Margin="0,7,0,0" DblClick="gridFormulas_DblClick">
                        <uwayG:UwayDataGrid.Columns>
                            <!--<sdk:DataGridTextColumn  Binding="{Binding FormulaContent}"  Width="180" x:Name="FormulaContent" Header="公式内容" />
                            <sdk:DataGridTextColumn Binding="{Binding NMinute}"  Width="50" x:Name="NMinute" Header="时间"/>
                            <sdk:DataGridTextColumn Binding="{Binding NCount}"   Width="50" x:Name="NCount" Header="次数"/>
                            <sdk:DataGridTextColumn  Binding="{Binding WarnLeavl}"  Width="70" x:Name="WarnLeavl" Header="告警级别"   />-->
                            <sdk:DataGridTemplateColumn Width="180" Header="公式内容">
                                <sdk:DataGridTemplateColumn.CellTemplate>
                                    <DataTemplate>
                                        <TextBlock Visibility="{Binding Path=IsEnable,Mode=OneWay, 
                                            Converter={StaticResource ConverterTrue2Visibility}}" 
                                                   Text="{Binding FormulaContent}"></TextBlock>
                                    </DataTemplate>
                                </sdk:DataGridTemplateColumn.CellTemplate>
                            </sdk:DataGridTemplateColumn>
                            <sdk:DataGridTemplateColumn Width="50" Header="时间">
                                <sdk:DataGridTemplateColumn.CellTemplate>
                                    <DataTemplate>
                                        <TextBlock Visibility="{Binding Path=IsEnable,Mode=OneWay,
                                            Converter={StaticResource ConverterTrue2Visibility}}" Text="{Binding NMinute}"></TextBlock>
                                    </DataTemplate>
                                </sdk:DataGridTemplateColumn.CellTemplate>
                            </sdk:DataGridTemplateColumn>
                            <sdk:DataGridTemplateColumn Width="50" Header="次数">
                                <sdk:DataGridTemplateColumn.CellTemplate>
                                    <DataTemplate>
                                        <TextBlock Visibility="{Binding Path=IsEnable,Mode=OneWay,
                                            Converter={StaticResource ConverterTrue2Visibility}}" Text="{Binding NCount}"></TextBlock>
                                    </DataTemplate>
                                </sdk:DataGridTemplateColumn.CellTemplate>
                            </sdk:DataGridTemplateColumn>
                            <sdk:DataGridTemplateColumn Width="70" Header="告警级别">
                                <sdk:DataGridTemplateColumn.CellTemplate>
                                    <DataTemplate>
                                        <TextBlock Visibility="{Binding Path=IsEnable,Mode=OneWay,
                                            Converter={StaticResource ConverterTrue2Visibility}}" Text="{Binding WarnLeavl}"></TextBlock>
                                    </DataTemplate>
                                </sdk:DataGridTemplateColumn.CellTemplate>
                            </sdk:DataGridTemplateColumn>
                        </uwayG:UwayDataGrid.Columns>
                    </uwayG:UwayDataGrid>

 

 public class ConverterTrue2Visibility : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            if ((bool)value)
            {
                return Visibility.Visible;
            }
            else
            {
                return Visibility.Collapsed;
            }
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }

 

  <local:ConverterTrue2Visibility  x:Key="ConverterTrue2Visibility">
 </local:ConverterTrue2Visibility>

//顺带提一句  如果后台设置bingding 只需要实例化ConverterTrue2Visibility，然后把对象给bingding的convert