wpf Value and Multivalue Converters Simple add converter [IMultiValueConverter]
Example
Show how to create simple IMultiValueConverter converter and use MultiBinding in xaml. Get summ of all values passed by values array.
public class AddConverter : IMultiValueConverter
{
public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
{
decimal sum = 0M;
foreach (string value in values)
{
decimal parseResult;
if (decimal.TryParse(value, out parseResult))
{
sum += parseResult;
}
}
return sum.ToString(culture);
}
public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
{
throw new NotSupportedException();
}
}
Using the converter
- Define namespace
xmlns:converters="clr-namespace:MyProject.Converters;assembly=MyProject"
- Define Resource
<converters:AddConverter x:Key="AddConverter"/>
- Use it in binding
<StackPanel Orientation="Vertical">
<TextBox x:Name="TextBox" />
<TextBox x:Name="TextBox1" />
<TextBlock >
<TextBlock.Text>
<MultiBinding Converter="{StaticResource AddConverter}">
<Binding Path="Text" ElementName="TextBox"/>
<Binding Path="Text" ElementName="TextBox1"/>
</MultiBinding>
</TextBlock.Text>
</TextBlock>
</StackPanel>
