WPF MultiBinding 实现控件 Tooltip 多绑定

//convert

public class CanBeAppliedDisplayConverter : IMultiValueConverter

{

#region Implementation of IMultiValueConverter

public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)

{

if (values[0].ToString() == string.Empty || values[1].ToString() == string.Empty)

return "";

return values[0].ToString() + values[1].ToString();

}

public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)

{

throw new NotImplementedException();

}

#endregion

}

//viewmodel

public class viewmodel : INotifyPropertyChanged

{

private string _name1;

public string name1

{

get { return _name1; }

set

{

_name1 = value;

OnPropertyChanged("name1");

}

}

private string _name2;

public string name2

{

get { return _name2; }

set

{

_name2 = value;

OnPropertyChanged("name2");

}

}

public event PropertyChangedEventHandler PropertyChanged;

[NotifyPropertyChangedInvocator]

protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)

{

PropertyChangedEventHandler handler = PropertyChanged;

if (handler != null)

{

handler(this, new PropertyChangedEventArgs(propertyName));

}

}

}

//xaml

<TextBlock DataContext="{Binding}">

<TextBlock.ToolTip>

<ToolTip >

<TextBlock DataContext="{Binding}">

<TextBlock.Text>

<MultiBinding Converter="{StaticResource CanBeAppliedDisplayConverter}">

<Binding Path="name1" />

<Binding Path="name2" />

</MultiBinding>

</TextBlock.Text>

</TextBlock>

</ToolTip>

</TextBlock.ToolTip>

</TextBlock>