那些遇到过的问题

更改TextBox边框颜色的最佳做法？

Wii*_*axx 5 c# wpf user-interface mvvm

假设你有一个包含多个这样的Texbox的View

<TextBox Text="{Binding myText1, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True}" />
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每个都已包含一些文字.如果用户更改此文本,则文本框边框应更改为橙色,如果他撤消其更改,则应获取其默认颜色.

目前我这样做

<TextBox Height="23"  Text="{Binding myText1, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True}" BorderThickness="2">
   <TextBox.Style>
        <Style TargetType="TextBox">
             <Style.Triggers>
                 <DataTrigger Binding="{Binding myDirtyText1, UpdateSourceTrigger=PropertyChanged}" Value="True">
                     <Setter Property="BorderBrush" Value="Orange"/>
                 </DataTrigger>
             </Style.Triggers>
        </Style>
    </TextBox.Style>
</TextBox>
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有没有更通用/更简单的方法来做到这一点？

编辑

我已经在使用IDataErrorInfo+ System.ComponentModel.DataAnnotations进行错误验证.也许在这种情况下有类似的方法,但我没有发现任何有用的减少我的xaml和代码到最低限度.

编辑2.0

我认为你并不真正了解我的问题,所以我会提供一个更好的实际样本:

查看Xaml(无代码隐藏)

<Grid Margin="12">
    <Label Content="Name:" Height="28" HorizontalAlignment="Left" VerticalAlignment="Top" Width="79" />
    <TextBox Height="23" HorizontalAlignment="Left" Margin="102,2,0,0" VerticalAlignment="Top" Width="170" BorderThickness="2"
             Text="{Binding NameD, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True}">
        <TextBox.Style>
            <Style TargetType="TextBox">
                <Style.Triggers>
                    <DataTrigger Binding="{Binding dirtyName, UpdateSourceTrigger=PropertyChanged}" Value="True">
                        <Setter Property="BorderBrush" Value="Orange"/>
                    </DataTrigger>
                </Style.Triggers>
            </Style>
        </TextBox.Style>
    </TextBox>

    <Label Content="Anzeigetext:" Height="28" HorizontalAlignment="Left" Margin="0,34,0,0" VerticalAlignment="Top" Width="79" />
    <TextBox BorderThickness="2" Height="23" HorizontalAlignment="Left" Margin="102,36,0,0" VerticalAlignment="Top" Width="170" 
             Text="{Binding AnzeigetextD, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True}">
        <TextBox.Style>
            <Style TargetType="TextBox">
                <Style.Triggers>
                    <DataTrigger Binding="{Binding dirtyAnzeigetext, UpdateSourceTrigger=PropertyChanged}" Value="True">
                        <Setter Property="BorderBrush" Value="Orange"/>
                    </DataTrigger>
                </Style.Triggers>
            </Style>
        </TextBox.Style>
    </TextBox>

    <Label Content="Preis:" Height="28" HorizontalAlignment="Left" Margin="0,68,0,0" VerticalAlignment="Top" Width="79" />
    <TextBox BorderThickness="2" Height="23" HorizontalAlignment="Left" Margin="102,70,0,0" VerticalAlignment="Top" Width="170" 
             Text="{Binding PreisD, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True, StringFormat=\{0:c\}}">
        <TextBox.Style>
            <Style TargetType="TextBox">
                <Style.Triggers>
                    <DataTrigger Binding="{Binding dirtyPreis, UpdateSourceTrigger=PropertyChanged}" Value="True">
                        <Setter Property="BorderBrush" Value="Orange"/>
                    </DataTrigger>
                </Style.Triggers>
            </Style>
        </TextBox.Style>
    </TextBox>

    <Button Content="Speichern" Height="23" HorizontalAlignment="Left" Margin="102,110,0,0" VerticalAlignment="Top" Width="75" Command="{Binding SaveCommand}"/>
    <Button Content="Abbrechen" Height="23" HorizontalAlignment="Left" Margin="197,110,0,0" VerticalAlignment="Top" Width="75" Command="{Binding CancelCommand}"/>
</Grid>
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视图模型

public class MenuangebotVM : DetailVM, IContains
{
    #region private Values
    private Menuangebot myOriginal = new Menuangebot();
    private Menuangebot myValue = new Menuangebot();
    #endregion // private Values

    #region Properties

    #region Detail Properties
    public int Id { get { return myOriginal.Id; } }
    public bool? Result { get; private set; }
    public string Beschreibung { get { return "Einrichtung"; } }

    [Required]
    [RegularExpression(@"^[0-9a-zA-ZäöüßÄÖÜß''-'\s]{2,40}$")]
    public string NameD
    {
        get { return myValue.Name; }
        set
        {
            myValue.Name = value;
            RaisePropertyChanged(() => Reg(() => NameD));
            RaisePropertyChanged(() => Reg(() => dirtyName));
        }
    }
    public bool dirtyName
    {
        get { return (!isNew && myValue.Name != myOriginal.Name) ? true : false; }
    }

    [Required]
    [RegularExpression(@"^[0-9a-zA-ZäöüßÄÖÜß''-'\s]{2,25}$")]
    public string AnzeigetextD
    {
        get { return myValue.Anzeigetext; }
        set
        {
            myValue.Anzeigetext = value;
            RaisePropertyChanged(() => Reg(() => AnzeigetextD));
            RaisePropertyChanged(() => Reg(() => dirtyAnzeigetext));
        }
    }
    public bool dirtyAnzeigetext
    {
        get { return (!isNew && myValue.Anzeigetext != myOriginal.Anzeigetext) ? true : false; }
    }

    [Required]
    public decimal PreisD
    {
        get { return myValue.Preis; }
        set
        {
            myValue.Preis = value;
            RaisePropertyChanged(() => Reg(() => PreisD));
            RaisePropertyChanged(() => Reg(() => dirtyPreis));
        }
    }
    public bool dirtyPreis
    {
        get
        {
            var value = myValue.Preis;
            var Original = myOriginal.Preis;

            return (!isNew && value != Original) ? true : false;
        }
    }

    #endregion //Detail Properties
    #endregion //Properties

// more code

}
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我怀疑应该是什么样的

视图

<Grid Margin="12">
    <Label Content="Name:" Height="28" HorizontalAlignment="Left" VerticalAlignment="Top" Width="79" />
    <TextBox Height="23" HorizontalAlignment="Left" Margin="102,2,0,0" VerticalAlignment="Top" Width="170" BorderThickness="2"
             Text="{Binding NameD, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True, EditesOnDataChanges=true}">

    </TextBox>

    <Label Content="Anzeigetext:" Height="28" HorizontalAlignment="Left" Margin="0,34,0,0" VerticalAlignment="Top" Width="79" />
    <TextBox BorderThickness="2" Height="23" HorizontalAlignment="Left" Margin="102,36,0,0" VerticalAlignment="Top" Width="170" 
             Text="{Binding AnzeigetextD, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True, EditesOnDataChanges=true}">
    </TextBox>

    <Label Content="Preis:" Height="28" HorizontalAlignment="Left" Margin="0,68,0,0" VerticalAlignment="Top" Width="79" />
    <TextBox BorderThickness="2" Height="23" HorizontalAlignment="Left" Margin="102,70,0,0" VerticalAlignment="Top" Width="170" 
             Text="{Binding PreisD, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True, StringFormat=\{0:c\, EditesOnDataChanges=true}}">
    </TextBox>

    <Button Content="Speichern" Height="23" HorizontalAlignment="Left" Margin="102,110,0,0" VerticalAlignment="Top" Width="75" Command="{Binding SaveCommand}"/>
    <Button Content="Abbrechen" Height="23" HorizontalAlignment="Left" Margin="197,110,0,0" VerticalAlignment="Top" Width="75" Command="{Binding CancelCommand}"/>
</Grid>
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视图模型

public class MenuangebotVM : DetailVM, IContains
{
    #region private Values
    private Menuangebot myOriginal = new Menuangebot();
    private Menuangebot myValue = new Menuangebot();
    #endregion // private Values

    #region Properties

    #region Detail Properties
    public int Id { get { return myOriginal.Id; } }
    public bool? Result { get; private set; }
    public string Beschreibung { get { return "Einrichtung"; } }

    [Required]
    [RegularExpression(@"^[0-9a-zA-ZäöüßÄÖÜß''-'\s]{2,40}$")]
    [Default(myOriginal.Name)] //<-- added
    public string NameD
    {
        get { return myValue.Name; }
        set
        {
            myValue.Name = value;
            RaisePropertyChanged(() => Reg(() => NameD));
        }
    }

    [Required]
    [RegularExpression(@"^[0-9a-zA-ZäöüßÄÖÜß''-'\s]{2,25}$")]
    [Default(myOriginal.Anzeigetext)] //<-- added
    public string AnzeigetextD
    {
        get { return myValue.Anzeigetext; }
        set
        {
            myValue.Anzeigetext = value;
            RaisePropertyChanged(() => Reg(() => AnzeigetextD));
        }
    }

    [Required]
    [Default(myOriginal.Preis)] //<-- added
    public decimal PreisD
    {
        get { return myValue.Preis; }
        set
        {
            myValue.Preis = value;
            RaisePropertyChanged(() => Reg(() => PreisD));
        }
    }    
    #endregion //Detail Properties
    #endregion //Properties

// more code

}
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yo *_*han 0 

public class ViewModel:INotifyPropertyChanged
    {
        private string initialText;
        public ViewModel()
        {
            Text = "ABCD";
            initialText = Text;
            DefaultBorder = true;
        }
        private string text;
        public string Text
        {
            get { return text; }
            set { text = value;
            if (value == initialText)
                DefaultBorder = true;
            else
                DefaultBorder = false;
                Notify("Text"); }
        }

        private bool defaultBorder;
        public bool DefaultBorder
        {
            get { return defaultBorder; }
            set { defaultBorder = value; Notify("DefaultBorder"); }
        }

        private void Notify(string propertyName)
        {
            if(PropertyChanged!=null)
                PropertyChanged(this,new PropertyChangedEventArgs(propertyName));
        }

        public event PropertyChangedEventHandler PropertyChanged;
    }

public class MyConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            if (value != null && value is bool && !(bool)value)
                return new SolidColorBrush(Colors.Orange);
            else
                return new SolidColorBrush(Colors.Navy); //Or default whatever you want

        }

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

    <Window.Resources>
    <local:MyConverter x:Key="MyConverter"/>
</Window.Resources>
<Grid>
    <TextBox BorderThickness="4" BorderBrush="{Binding DefaultBorder, Converter={StaticResource MyConverter}}" Text="{Binding Text, UpdateSourceTrigger=PropertyChanged}"/>
</Grid>
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在这里，我在 ViewModel 中有属性 Text 绑定到 TextBox，并且在开始时我保留了初始 Text 值。然后每当用户输入时，我在 Text 属性的设置器中对其进行比较并相应地设置 Bool 属性，此 bool 属性将指定使用转换器绑定哪种颜色。忽略小问题希望您能有所了解。

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