1

我想将属性绑定到行的背景...

目标是将颜色随机设置为值“msgid”为空的行（我有 +- 10 个 RGB 代码）。

注意：为什么我必须设置 INotifyPropertyChanged ？我不明白...我不需要设置部分！？

是）我有的：

在我的窗口类中： 

OtherClass viewModel = new OtherClass();
this.DataContext = viewModel;

然后在其他类中：

 class OtherClass : INotifyPropertyChanged
{

    Brush color = new SolidColorBrush(Colors.Green);

    public Brush RowColor
    {

        get { return color; }
        set
        {
            color = value;
            this.OnPropertyChanged("RowColor");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    void OnPropertyChanged(string propName)
    {
        if (this.PropertyChanged != null)
            this.PropertyChanged(
                this, new PropertyChangedEventArgs(propName));
    }


}

XAML：

<Window x:Class="WpfApplication1.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="536" Width="659" Loaded="Window_Loaded" Icon="/WpfApplication1;component/Images/dtc.ico">

<Window.Resources>

    <XmlDataProvider x:Key="SmsData" XPath="/response">

    </XmlDataProvider>

</Window.Resources>

<Grid Width="642">
    <DataGrid ItemsSource="{Binding Source={StaticResource SmsData}, XPath=conv/sms}" AutoGenerateColumns="False" Name="dataGrid1" GridLinesVisibility="None" IsReadOnly="True" ScrollViewer.CanContentScroll="True" ScrollViewer.VerticalScrollBarVisibility="Auto" ScrollViewer.HorizontalScrollBarVisibility="Auto" Margin="-5,13,4,244" BorderThickness="0" UseLayoutRounding="False" IsEnabled="True" SelectionChanged="dataGrid1_SelectionChanged">
        <DataGrid.Columns>
            <DataGridTextColumn Binding="{Binding XPath=msgid}" Width="100"  />
            <DataGridTextColumn Binding="{Binding XPath=imsgid}" Width="100"  />
            <DataGridTextColumn Binding="{Binding XPath=recipient}" Width="100"  />
            <DataGridTextColumn Binding="{Binding XPath=datetime}" Width="120" />
            <DataGridTextColumn Binding="{Binding XPath=message}" Width="225" />
        </DataGrid.Columns>


        <DataGrid.RowStyle>
            <Style TargetType="{x:Type  DataGridRow}">


               <DataTrigger Binding="{Binding XPath=msgid}" Value="{x:Null}">


                        <Setter Property="Background" Value="{Binding RowColor}" />

                    </DataTrigger>


            </Style>
        </DataGrid.RowStyle>
    </DataGrid>
    <RichTextBox Height="122" HorizontalAlignment="Left" Margin="402,311,0,0" Name="richTextBox1" VerticalAlignment="Top" Width="228" VerticalScrollBarVisibility="Visible" />
    <Menu Height="23" HorizontalAlignment="Left" Name="menu1" VerticalAlignment="Top" Width="645">
        <MenuItem Header="Menu">
            <MenuItem Header="Exit" />
        </MenuItem>
        <MenuItem Header="Logs" />
        <MenuItem Header="Help" />
    </Menu>
    <Image Height="48" HorizontalAlignment="Left" Margin="-10,251,0,0" Name="image1" Stretch="None" VerticalAlignment="Top" Width="317" Source="/WpfApplication1;component/Images/send%20sms.jpg" />
    <Button Content="send messge" Height="23" HorizontalAlignment="Left" Margin="402,454,0,0" Name="button1" VerticalAlignment="Top" Width="228" Click="button1_Click" />
    <Label Content="Number:" Height="28" HorizontalAlignment="Left" Margin="165,311,0,0" Name="label1" VerticalAlignment="Top" />
    <Image Height="35" HorizontalAlignment="Left" Margin="300,252,0,0" Name="image2" Stretch="Fill" VerticalAlignment="Top" Width="338" Source="/WpfApplication1;component/Images/line.jpg" />
    <TextBox Text="{Binding Path=Name2}" Height="23" HorizontalAlignment="Left" Margin="240,316,0,0" Name="textBox1" VerticalAlignment="Top" Width="120" />
</Grid>

4

1 回答 1

0

rowColor 属性不会引发 PropertyChanged 事件。

在 OtherClass 上实现 INotifyPropertychanged 并在 rowColor 属性的设置器中引发 PropertyChanged 事件。

顺便说一句：请坚持微软命名属性的方式：RowColor 而不是 rowColor。这可以防止混淆。

于 2012-12-18T20:15:14.400 回答