我正在尝试使用 ViewModel 更改 Silverlight 表单上动态创建的按钮的按钮文本颜色。我面临的问题是,当我更改按钮文本的颜色时,所有按钮都会生效。由于按钮是动态创建的,因此我无法对其进行控制。
有人建议我在 Model 中写入 ForegroundColor 属性,然后附加到按钮上,我尝试了如您在代码中看到的那样,但对此无能为力。
您能否看到我在做什么,并帮助我提出您的建议,因为我不确定,我做对了。
谢谢
模型
namespace Web.Models
{
[DataContract(IsReference = true)]
public class Sales
{
[DataMember]
public int SalesId { get; set; }
[DataMember]
public int ShowOrder { get; set; }
[DataMember]
public bool Active { get; set; }
[DataMember]
public bool Regurgitate { get; set; }
[DataMember]
public int ForegroundColor { get; set; }
public Sales(Salese result)
{
SalesId = result.SalesId;
ShowOrder = result.ShowOrder;
Active = result.Active;
Regurgitate = result.Regurgitate;
if (SalesId == 12)
{
var bytes = System.BitConverter.GetBytes(ForegroundColor);
Color btnColor = Color.FromArgb(bytes[3], bytes[2], bytes[1], bytes[0]);
SolidColorBrush myBrush = new SolidColorBrush(btnColor);
}
}
}
}
视图模型
private Brush _foregroundColor = new SolidColorBrush(Colors.Black);
public override void Loaded()
{
OnMainOutcome();
}
public Brush ForegroundColor
{
get { return _foregroundColor; }
set
{
if (_foregroundColor == value) return;
_foregroundColor = value;
OnPropertyChanged("ForegroundColor");
}
}
private void OnMainOutcome()
{
var selectedSalesId = (int)OutcomeCommand.CommandParameter;
CurrentSubOutcomes = GetCurrentSubOutcomes(selectedSalesId);
foreach (var index in CurrentOutcomes)
{
if (index.OutcomeId == 12)
ForegroundColor = new SolidColorBrush(Colors.Red);
else
ForegroundColor = new SolidColorBrush(Colors.Black);
}
}
XAML 已编辑
<controls:ChildWindow.Resources>
<converters:NumericToColorConverter x:Key="NumericToColorConverter"/>
</controls:ChildWindow.Resources>
<ListBox Grid.Row="1" Height="Auto" MinHeight="200" Width="160" Margin="2,2,2,2" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" ItemsSource="{Binding Path=CurrentOutcomes}" Background="{x:Null}" BorderBrush="{x:Null}">
<ListBox.ItemTemplate>
<DataTemplate>
<Button Height="30" Width="150" HorizontalAlignment="Center" Content="{Binding Outcome}" CommandParameter="{Binding SalesOutcomeId }" Command="{Binding Source={StaticResource ViewModel}, Path=OutcomeCommand}" Foreground="{Binding Source={StaticResource ViewModel}, Converter={StaticResource NumericToColorConverter}, Path=ForegroundColor}" />
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
转换器类 NEW
using System;
using System.Windows.Data;
using System.Windows.Media;
using System.Windows;
namespace Converters
{
public class NumericToColorConverter : IValueConverter
{
static readonly SolidColorBrush RED_BRUSH = new SolidColorBrush(Colors.Red);
static readonly SolidColorBrush BLUE_BRUSH = new SolidColorBrush(Colors.Blue);
public object Convert(object value, Type targetType,
object parameter, System.Globalization.CultureInfo culture)
{
//Int32 id = System.Convert.ToInt32(value);
//LinearGradientBrush brush = new LinearGradientBrush();
//brush.StartPoint = new Point(0, 1);
//brush.EndPoint = new Point(0, 0);
//brush.GradientStops.Add(new GradientStop()
//{
// Color = Colors.White,
// Offset = 0
//});
//brush.GradientStops.Add(new GradientStop()
//{
// Color = Color.FromArgb(
// 200,
// System.Convert.ToByte((id * 103) % 256),
// System.Convert.ToByte((id * 157) % 256),
// System.Convert.ToByte((id * 233) % 256)
// ),
// Offset = 1
//});
//return brush;
var OutcomeId = (int)value;
if (OutcomeId == 12)
{
return RED_BRUSH;
}
else
{
return BLUE_BRUSH;
}
}
public object ConvertBack(object value, Type targetType, object parameter,
System.Globalization.CultureInfo culture)
{
throw new NotImplementedException();
}
}
}