Question

我有一个像tcp应用程序的聊天。我想区分发送和接收消息的颜色。我该如何以编程方式执行此操作？任何帮助表示赞赏

修改如果我可以改变行颜色就没问题。

Answer 1

您可以更改项目的文本前景。

item.foreground = new SolidColorBrush(Colors.Green);

Answer 2

好的，这样做..

创建一个类

 public class MSGS
    {
        public string color {get;set;}
        public string message {get;set;}
    }

现在而不是在List<String>创建List<MSGS>中添加项目，并将消息设置为等于消息，如果发送消息，则设置颜色让我们说Blue或者如果收到消息则设置颜色为Red。

  MSGS one = new MSGS ();
    one.message = "testing";
    one.color = "Red";

    MSGS two = new MSGS();
    two.message = "testing2";
    two.color = "Blue";

    MSGS three = new MSGS();
    three.message = "testing3";
    three.color = "Red";

    List<MSGS> list = new List<MSGS> ();
    list.Add(one);
    list.Add(two);
    list.Add(three);

    myLB.ItemsSource = list;

在XAML中为listboxitem定义一个样式

<UserControl.Resources>

    <Style TargetType="ListBoxItem">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate>
                    <TextBlock Foreground="{Binding Path=color}"  Text="{Binding Path=message}"/>

                </ControlTemplate>
            </Setter.Value>
        </Setter>

    </Style>

</UserControl.Resources>

此代码将显示收到的消息并以不同的颜色发送消息

更详细的方法 尝试下面的样式而不是上面的样式

  <UserControl.Resources>
        <DataTemplate x:Key="DataTemplate1">
            <StackPanel>
                <TextBlock Text="{Binding message}"/>
            </StackPanel>
        </DataTemplate>
        <DataTemplate x:Key="DataTemplate2">
            <StackPanel>
                <TextBlock Text="{Binding message}" FontWeight="Bold"/>
            </StackPanel>
        </DataTemplate>

        <Style TargetType="ListBoxItem">
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="ListBoxItem">
                        <Grid Background="{Binding Path=type}">
                            <VisualStateManager.VisualStateGroups>
                                <VisualStateGroup x:Name="CommonStates">
                                    <VisualState x:Name="Normal"/>
                                    <VisualState x:Name="MouseOver">
                                        <Storyboard>
                                            <DoubleAnimation Duration="0" To=".35" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="fillColor"/>
                                        </Storyboard>
                                    </VisualState>
                                    <VisualState x:Name="Disabled">
                                        <Storyboard>
                                            <DoubleAnimation Duration="0" To=".55" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="contentPresenter1"/>
                                        </Storyboard>
                                    </VisualState>
                                </VisualStateGroup>
                                <VisualStateGroup x:Name="SelectionStates">
                                    <VisualState x:Name="Unselected"/>
                                    <VisualState x:Name="Selected">
                                        <Storyboard>
                                            <DoubleAnimation Duration="0" To=".75" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="fillColor2"/>
                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="contentPresenter1">
                                                <DiscreteObjectKeyFrame KeyTime="0">
                                                    <DiscreteObjectKeyFrame.Value>
                                                        <Visibility>Collapsed</Visibility>
                                                    </DiscreteObjectKeyFrame.Value>
                                                </DiscreteObjectKeyFrame>
                                            </ObjectAnimationUsingKeyFrames>
                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="contentPresenter2">
                                                <DiscreteObjectKeyFrame KeyTime="0">
                                                    <DiscreteObjectKeyFrame.Value>
                                                        <Visibility>Visible</Visibility>
                                                    </DiscreteObjectKeyFrame.Value>
                                                </DiscreteObjectKeyFrame>
                                            </ObjectAnimationUsingKeyFrames>
                                        </Storyboard>
                                    </VisualState>
                                </VisualStateGroup>
                                <VisualStateGroup x:Name="FocusStates">
                                    <VisualState x:Name="Focused">
                                        <Storyboard>
                                            <ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="Visibility" Storyboard.TargetName="FocusVisualElement">
                                                <DiscreteObjectKeyFrame KeyTime="0">
                                                    <DiscreteObjectKeyFrame.Value>
                                                        <Visibility>Visible</Visibility>
                                                    </DiscreteObjectKeyFrame.Value>
                                                </DiscreteObjectKeyFrame>
                                            </ObjectAnimationUsingKeyFrames>
                                        </Storyboard>
                                    </VisualState>
                                    <VisualState x:Name="Unfocused"/>
                                </VisualStateGroup>
                            </VisualStateManager.VisualStateGroups>
                            <Rectangle x:Name="fillColor" Fill="#FFBADDE9" IsHitTestVisible="False" Opacity="0" RadiusY="1" RadiusX="1"/>
                            <Rectangle x:Name="fillColor2" Fill="#FFBADDE9" IsHitTestVisible="False" Opacity="0" RadiusY="1" RadiusX="1"/>
                            <ContentPresenter x:Name="contentPresenter1" ContentTemplate="{StaticResource DataTemplate1}" Content="{TemplateBinding Content}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}"/>
                            <ContentPresenter x:Name="contentPresenter2" ContentTemplate="{StaticResource DataTemplate2}" Content="{TemplateBinding Content}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="3,3,0,3" Visibility="Collapsed"/>
                            <Rectangle x:Name="FocusVisualElement" RadiusY="1" RadiusX="1" Stroke="#FF6DBDD1" StrokeThickness="1" Visibility="Collapsed"/>
                            <ListBox HorizontalAlignment="Left" Height="4" Margin="-90,0,0,-163" VerticalAlignment="Bottom" Width="31"/>
                        </Grid>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>

        </Style>

    </UserControl.Resources>

从http://forums.silverlight.net/forums/p/35969/113333.aspx

获取此信息

如果您想了解更多关于样式的信息，请查看这些链接

http://weblogs.asp.net/scottgu/pages/silverlight-tutorial-part-4-using-style-elements-to-better-encapsulate-look-and-feel.aspx

http://www.silverlightshow.net/items/Skinning-and-Styling-Silverlight-Controls.aspx

Answer 3

我用一个使用样式转换器的绑定做了一个例子。

您可以在此处阅读整个实施和示例：http://vanderbiest.org/blog/2011/07/12/listbox-individual-item-color-in-silverlight/

列表框实施

<listbox itemssource="{Binding Messages}" maxwidth="300" borderbrush="Black" borderthickness="2">
    <listbox.itemtemplate>
        <datatemplate>
                <textblock text="{Binding Name}" style="{Binding IsInError, Converter={StaticResource listboxMessageStyleConverter}}">
        </textblock></datatemplate>
    </listbox.itemtemplate>
</listbox>

转换器实施

public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        if ((bool)value)
        {
            return Application.Current.Resources["ListBoxTextNormalItem"];
        }

        return Application.Current.Resources["ListBoxTextErrorItem"];
    }

样式实施

<style x:key="ListBoxTextNormalItem" targettype="TextBlock">
    <Setter Property="Foreground">
        <Setter.Value>
            <SolidColorBrush Color='#0A7B27' />
        </Setter.Value>
    </Setter>
</style>

<style x:key="ListBoxTextErrorItem" targettype="TextBlock">
    <Setter Property="Foreground">
        <Setter.Value>
            <SolidColorBrush Color='#FF2A1B' />
        </Setter.Value>
    </Setter>
    <Setter Property="FontWeight" Value="Bold" />
</style>

Answer 4

查看以下链接; http://forums.create.msdn.com/forums/p/74900/455850.aspx 它具有改变所选项目的前景色的工作解决方案。因此，当您收到消息时，将其标记为具有样式的选定项目，您可以更改文本的前景色。

如何在silverlight中以编程方式单独更改列表框项目的颜色？

4 个答案: