WPF學習筆記-DataGrid后台動態生成列，設置列樣式並使用值轉換器

一、后台動態生成DataGrid的列

HistoricalDataDG.Columns.Clear();
HistoricalDataDG.Columns.Add(new DataGridTextColumn() { Header = "時間", ElementStyle = (System.Windows.Style)FindResource("TbrqStyle"), IsReadOnly = true });
HistoricalDataDG.Columns.Add(new DataGridTextColumn() { Header = "T01(℃)", Binding = new Binding("T01"), ElementStyle = (System.Windows.Style)FindResource("dgCell_T01"), IsReadOnly = true});

在后台使用前台xaml里的style  使用FindResource()

二、設置列樣式並使用值轉換器

前台設置的樣式代碼

<UserControl.Resources>
        <ResourceDictionary>
            <root:DGColorConverter x:Key="DGColorConverter"/>

            <Style x:Key="TbrqStyle" TargetType="TextBlock">
                <Setter Property="Text" Value="{Binding Path=Tbrq,StringFormat='yyyy-MM-dd HH:mm:ss'}">
                </Setter>
            </Style>
            <Style x:Key="dgCell_T01" TargetType="TextBlock">
                <!-- 文本居中-->
                <Setter Property="TextAlignment" Value="Center"/>
                <!-- 根據其他列的值設置文本顏色-->
                <Setter Property="Foreground">
                    <Setter.Value>
                        <MultiBinding Converter="{StaticResource DGColorConverter}">
                            <Binding Path="T01"></Binding>
                            <Binding Path="High_Temperature"></Binding>
                            <Binding Path="Mim_Temperature"></Binding>
                        </MultiBinding>
                    </Setter.Value>
                </Setter>
            </Style>
        </ResourceDictionary>
</UserControl.Resources>

TbrqStyle設置時間顯示格式為24小時制，在實際使用時發現后台不能設置Binding，否則顯示格式無效

值轉換器DGColorConverter

public class DGColorConverter : IMultiValueConverter
{
        /// 需傳入一組對象，（基礎值 比對值）
        public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            if (values[0] == DependencyProperty.UnsetValue)
            {
                return "";
            }
                
            float tvalue = float.Parse(values[0].ToString());
            float hvalue = float.Parse(values[1].ToString());
            float mvalue = float.Parse(values[2].ToString());
            if (tvalue > hvalue || tvalue < mvalue)
            {
                return new SolidColorBrush(Colors.Red);
            }
            else
            {
                return new SolidColorBrush(Colors.Black);
            }
        }

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

通過與其他列的值進行比較，使當前列的文字顯示不同顏色

參考

https://www.cnblogs.com/jameslif/archive/2013/07/24/3209955.html

https://www.cnblogs.com/woodenmancool/p/4268539.html?utm_source=tuicool&utm_medium=referral

http://www.cnblogs.com/lingboxingzi/archive/2012/05/09/2491478.html