如何更改ListView中單個行的顏色？

Question

我構建了鏈接到實體框架的WPF應用程序。

程序將用戶詳細信息添加到列表中，並將所有詳細信息存儲在數據庫中。所以無論何時關閉並重新打開應用程序，以前添加的細節都在那裏。

該應用程序具有計算平均模塊等級的功能。

這裏是我的代碼片段：

if (averageResult < 7 && averageResult > 5) 
{ 
    student.Average_Grade = "F"; 
} 

因此，如果這一條件得到滿足，我也希望該行變爲紅色或字母F變紅。

我搜索了互聯網，但只有我發現的事情是如何改變它在一個簡單的WPF應用程序沒有鏈接到數據庫。

那麼如果WPF應用程序鏈接到數據庫，如何更改ListView中單個行的顏色？

UPDATE

伊夫嘗試這種代碼：但

student.Average_Grade = "F" + new SolidColorBrush(Colors.Red); 

而不是單行改變整個窗口的顏色

LISTVIEW XAML

<ListView Grid.Row="0" x:Name="studentListView" SelectionMode="Single" Margin="10,10,-10,10" ItemsSource="{Binding}"> 
      <ListView.View> 
       <GridView> 

        <GridViewColumn x:Name="first_NameColumn" Width="80" Header="First Name"> 
         <GridViewColumn.CellTemplate> 
          <DataTemplate> 
           <TextBox Margin="-6,-1" Text="{Binding First_Name, Mode=TwoWay, NotifyOnValidationError=true, ValidatesOnExceptions=true}" IsReadOnly="True"/> 
          </DataTemplate> 
         </GridViewColumn.CellTemplate> 
        </GridViewColumn> 
        <GridViewColumn x:Name="last_NameColumn" Width="80" Header="Last Name"> 
         <GridViewColumn.CellTemplate> 
          <DataTemplate> 
           <TextBox Margin="-6,-1" Text="{Binding Last_Name, Mode=TwoWay, NotifyOnValidationError=true, ValidatesOnExceptions=true}" IsReadOnly="True"/> 
          </DataTemplate> 
         </GridViewColumn.CellTemplate> 
        </GridViewColumn> 
        <GridViewColumn x:Name="matric_NumberColumn" Width="80" Header="Matric Number"> 
         <GridViewColumn.CellTemplate> 
          <DataTemplate> 
           <TextBox Margin="-6,-1" Text="{Binding Matric_Number, Mode=TwoWay, NotifyOnValidationError=true, ValidatesOnExceptions=true}" IsReadOnly="True"/> 
          </DataTemplate> 
         </GridViewColumn.CellTemplate> 
        </GridViewColumn> 

        <GridViewColumn x:Name="component1_GradeColumn" Width="80" Header="Component 1 Grade" > 
         <GridViewColumn.CellTemplate> 
          <DataTemplate> 
           <TextBox Margin="6,-1,-6,-1" Text="{Binding Component1_Grade, Mode=TwoWay, NotifyOnValidationError=true, ValidatesOnExceptions=true}" IsReadOnly="True"/> 
          </DataTemplate> 
         </GridViewColumn.CellTemplate> 
        </GridViewColumn> 
        <GridViewColumn x:Name="component2_GradeColumn" Width="80" Header="Component 2 Grade"> 
         <GridViewColumn.CellTemplate> 
          <DataTemplate> 
           <TextBox Margin="-6,-1" Text="{Binding Component2_Grade, Mode=TwoWay, NotifyOnValidationError=true, ValidatesOnExceptions=true}" IsReadOnly="True"/> 
          </DataTemplate> 
         </GridViewColumn.CellTemplate> 
        </GridViewColumn> 
        <GridViewColumn x:Name="component3_GradeColumn" Width="80" Header="Component 3 Grade"> 
         <GridViewColumn.CellTemplate> 
          <DataTemplate> 
           <TextBox Margin="-6,-1" Text="{Binding Component3_Grade, Mode=TwoWay, NotifyOnValidationError=true, ValidatesOnExceptions=true}" IsReadOnly="True"/> 
          </DataTemplate> 
         </GridViewColumn.CellTemplate> 
        </GridViewColumn> 
        <GridViewColumn x:Name="average_GradeColumn" Width="80" Header="Average Grade"> 
         <GridViewColumn.CellTemplate> 
          <DataTemplate> 
           <TextBox Margin="-6,-1" Text="{Binding Average_Grade, Mode=TwoWay, NotifyOnValidationError=true, ValidatesOnExceptions=true}" IsReadOnly="True"/> 
          </DataTemplate> 
         </GridViewColumn.CellTemplate> 
        </GridViewColumn> 
        <GridViewColumn x:Name="edit"> 
         <GridViewColumn.CellTemplate> 
          <DataTemplate> 
           <Button Content="Edit" Click="OnEdit"/> 
          </DataTemplate> 
         </GridViewColumn.CellTemplate> 
        </GridViewColumn> 
        <GridViewColumn x:Name="delete"> 
         <GridViewColumn.CellTemplate> 
          <DataTemplate> 
           <Button Content="Delete" Click="OnDelete" /> 
          </DataTemplate> 
         </GridViewColumn.CellTemplate> 
        </GridViewColumn> 
       </GridView> 
      </ListView.View> 
      <ListView.ItemContainerStyle> 
       <Style> 
        <Setter Property="Control.HorizontalContentAlignment" Value="Stretch"/> 
        <Setter Property="Control.VerticalContentAlignment" Value="Stretch"/> 
       </Style> 
      </ListView.ItemContainerStyle> 
     </ListView> 

Answer 1

您可以使用轉換器。添加一個新類波紋管：

public class Converter : IValueConverter 
{ 
    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) 
    { 
     if(value.ToString() == "F") 
      return new SolidColorBrush(Colors.Red); 
     else 
      return new SolidColorBrush(Colors.Black); 
    } 

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

而在XAML中添加此：

<Window.Resources> // Or UserControl.Resources 
    <local:Converter x:Key="converter"/> 
</Window.Resources> 

而更換ItemContainerStyle

<ListView.ItemContainerStyle> 
    <Style TargetType="ListViewItem"> 
     <Setter Property="Control.HorizontalContentAlignment" Value="Stretch"/> 
     <Setter Property="Control.VerticalContentAlignment" Value="Stretch"/> 
     <Setter Property="Foreground" Value="{Binding Average_Grade, Converter={StaticResource converter}}" /> 
    </Style> 
</ListView.ItemContainerStyle>