Question

我有一个课程如下

public class Account
{
    public string TransferFromIndicator { get; set; }
    public string AccNickname { get; set; }
    public string AccountStatus { get; set; }
    public string AccIndex { get; set; }
    public SolidColorBrush RowColor { get; set; }
}

正在从后端数据设置除RowColor属性之外的所有数据。在从后端重新获取数据时，我想选择每种替代颜色为黑色，即第一项颜色为白色，下一项颜色为白色。我一直试图用下面的代码片段来做这件事。你能帮我解决一下如何为备用元素设置不同的rowcolor。

  List<Account> newList = from x in AccountList select new Account
  { 
       TransferFromIndicator=TransferFromIndicator 
       AccNickname = AccNickname,
       RowColor = 
  }

Answer 1

试试这个：

XAML：

        <ListBox x:Name="lst">
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <StackPanel>
                        <TextBlock Text="{Binding AccNickname}" Foreground="{Binding RowColor}"/>
                    </StackPanel>
                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>

CS：

    public class Account
    {
        public string TransferFromIndicator { get; set; }
        public string AccNickname { get; set; }
        public string AccountStatus { get; set; }
        public string AccIndex { get; set; }
        public string RowColor { get; set; }

        public Account() { }
        public Account(string TransferFromIndicator,string AccNickname,string AccountStatus,string AccIndex,string RowColor)
        {
            this.TransferFromIndicator = TransferFromIndicator;
            this.AccNickname = AccNickname;
            this.AccountStatus = AccountStatus;
            this.AccIndex = AccIndex;
            this.RowColor = RowColor;
        }
    }

        void loadData()
        {
            List<Account> objAccount = new List<Account>();
            objAccount.Add(new Account("data", "data", "data", "data", "White"));
            objAccount.Add(new Account("data", "data", "data", "data", "Black"));
            objAccount.Add(new Account("data", "data", "data", "data", "White"));
            objAccount.Add(new Account("data", "data", "data", "data", "Black"));
            objAccount.Add(new Account("data", "data", "data", "data", "White"));
            objAccount.Add(new Account("data", "data", "data", "data", "Black"));
            lst.ItemsSource = objAccount;
        }

        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
            base.OnNavigatedTo(e);
            loadData();
        }

Answer 2

我通常会使用转换器。互联网上还有一个替代的行颜色实现，用于列表框控件。

按照自己的方式行事：

public class Account
{
    public string TransferFromIndicator { get; set; }
    public string AccNickname { get; set; }
    public string AccountStatus { get; set; }
    public string AccIndex { get; set; }
    public SolidColorBrush RowColor { get; set; }
}

public class MyViewModel
{
    public void BindData()
    {
        var accounts = new List<Account>
        {
            new Account { AccIndex = "One", AccNickname = "First Account", AccountStatus = "Closed", TransferFromIndicator = "xyz" },
            new Account { AccIndex = "Two", AccNickname = "Second Account", AccountStatus = "Open", TransferFromIndicator = "xyz" },
            new Account { AccIndex = "Third", AccNickname = "Third Account", AccountStatus = "Pending", TransferFromIndicator = "xyz" },
            new Account { AccIndex = "Fourth", AccNickname = "Fourth Account", AccountStatus = "Closed", TransferFromIndicator = "xyz" },
            new Account { AccIndex = "Fifth", AccNickname = "Fifth Account", AccountStatus = "Open", TransferFromIndicator = "xyz" },
            new Account { AccIndex = "Sixth", AccNickname = "Sixth Account", AccountStatus = "Pending", TransferFromIndicator = "xyz" }
        };

        var index = 0;
        accounts.ForEach(a => { a.RowColor = ((index % 2 == 0) ? new SolidColorBrush(Colors.Red) : new SolidColorBrush(Colors.Green)); index++; });
    }
}

Answer 3

首先纠正你的标签。您需要WPF或Windows Phone的解决方案吗？请尝试下面给出的代码。

XAML

<Page.Resources>
    <local:AlternateColor x:Name="AlternateColor" />
</Page.Resources>

<Grid>
    <ListBox x:Name="lbx">
        <ListBox.ItemTemplate>
            <DataTemplate>
                <StackPanel Background="{Binding Converter={StaticResource AlternateColor}}">
                    <TextBlock Text="{Binding TransferFromIndicator}" Foreground="GreenYellow" />
                    <TextBlock Text="{Binding AccNickname}" Foreground="GreenYellow"/>
                    <TextBlock Text="{Binding AccountStatus}" Foreground="GreenYellow"/>
                    <TextBlock Text="{Binding AccIndex}" Foreground="GreenYellow"/>
                </StackPanel>
            </DataTemplate>
        </ListBox.ItemTemplate>
    </ListBox>
</Grid>

获取数据

var list = new List<Account>();

for (int i = 0; i < 10; i++)
{
    list.Add(new Account
    {
        AccIndex = Path.GetRandomFileName(),
        AccNickname = Path.GetRandomFileName(),
        AccountStatus = Path.GetRandomFileName(),
        TransferFromIndicator = Path.GetRandomFileName()
    });
}

/*if you don't want to use converter

List<Account> newList = from x in AccountList select s;

bool ThrowBlack = false;
foreach (var item in s)
{
    if (ThrowBlack)
    {
        ThrowBlack = false;
        item.RowColor = new SolidColorBrush(Windows.UI.Colors.Black);
    }
    else
    {
        ThrowBlack = true;
        item.RowColor = new SolidColorBrush(Windows.UI.Colors.White);
    }
}

*/

lbx.ItemsSource = list;

转换器

public class AlternateColor : IValueConverter
{
    bool ThrowBlack = false;
    public object Convert(object value, Type targetType, object parameter, string language)
    {
        var obj = (Account)value;
        if (ThrowBlack)
        {
            ThrowBlack = false;
            obj.RowColor = new SolidColorBrush(Windows.UI.Colors.Black);
            return obj.RowColor;
        }
        else
        {
            ThrowBlack = true;
            obj.RowColor = new SolidColorBrush(Windows.UI.Colors.White);
            return obj.RowColor;
        }
    }

    public object ConvertBack(object value, Type targetType, object parameter, string language)
    {
        throw new NotImplementedException();
    }
}

为列表元素指定备用颜色

3 个答案: