silverlight IValueConverter

最新推荐文章于 2017-11-21 04:08:00 发布

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最新推荐文章于 2017-11-21 04:08:00 发布

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原文链接：http://www.cnblogs.com/luosm/archive/2011/11/24/2261873.html

本文介绍如何在DataGridView中通过自定义转换器实现根据行信息控制行的可见性，包括时间、次数和告警级别的展示。

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

要绑定的grid

 <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>

后台写的conver类

 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();
        }
    }

前后台关联

  <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

转载于:https://www.cnblogs.com/luosm/archive/2011/11/24/2261873.html