WPF MultiBinding 綁定指定的value

1.MultiBinding

　　MultiBinding：多值轉換器，繼承於 System.Windows.Data.IMultiValueConverter接口，綁定多條數據組合為一個數組，按照需求處理數據，並返回需要的值

2.使用

 

public class MultiStatueConverter : IMultiValueConverter
    {
       
        public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
        {
            
        }
        public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }

　　

 <Button Width="60" Height="40">
                <Button.Visibility>
                    <MultiBinding Converter="{StaticResource MultiStatueConverter}">
                        <Binding Path="DataContext.StartHostRounds" RelativeSource="{RelativeSource AncestorType=Window,Mode=FindAncestor}"/>
                        <Binding Path="IsLoginUser"/>
                    </MultiBinding>
                </Button.Visibility>
 </Button>

 <Binding Path="IsLoginUser"/> 根據當前控件的DataContext查找源

Binding:指定需要綁定的數據源，可通過ElementName，RelativeSource，Source指定綁定的數據源。

　ElementName:綁定到元素對象

　　   <Binding Path="Content"  ElementName="button"/>

 

RelativeSource：引用，使用RelativeSource對象指定源對象

 

 

<Binding Path="DataContext.StartHostRounds" RelativeSource="{RelativeSource AncestorType=Window,Mode=FindAncestor}"/>

　　

　Source:直接指向源對象

 

<Grid.Resources>
            <mydata:testData x:Key="testData " />
 </Grid.Resources>
<Binding Source="{StaticResource testData}" />