Binding Constructors

Definition

Namespace:

Microsoft.Maui.Controls

Assembly:

Microsoft.Maui.Controls.dll

Overloads

Name	Description
Binding()	Initializes a new instance of the Binding class.
Binding(String, BindingMode, IValueConverter, Object, String, Object)	Initializes a new instance of the Binding class with the specified path, mode, converter, and source.

Binding()

Source:

Binding.cs

Initializes a new instance of the Binding class.

public:
 Binding();

public Binding();

Public Sub New ()

Binding(String, BindingMode, IValueConverter, Object, String, Object)

Source:

Binding.cs

Initializes a new instance of the Binding class with the specified path, mode, converter, and source.

public Binding(string path, Microsoft.Maui.Controls.BindingMode mode = Microsoft.Maui.Controls.BindingMode.Default, Microsoft.Maui.Controls.IValueConverter converter = default, object converterParameter = default, string stringFormat = default, object source = default);

new Microsoft.Maui.Controls.Binding : string * Microsoft.Maui.Controls.BindingMode * Microsoft.Maui.Controls.IValueConverter * obj * string * obj -> Microsoft.Maui.Controls.Binding

Public Sub New (path As String, Optional mode As BindingMode = Microsoft.Maui.Controls.BindingMode.Default, Optional converter As IValueConverter = Nothing, Optional converterParameter As Object = Nothing, Optional stringFormat As String = Nothing, Optional source As Object = Nothing)

Parameters

path

String

The property path to bind to.

mode

BindingMode

The binding mode.

converter

IValueConverter

The value converter to use.

converterParameter

Object

The parameter to pass to the converter.

stringFormat

String

The string format to apply to the bound value.

source

Object

The source object for the binding.

Remarks

The following example shows how to set a binding to a property with a BindingMode and Converter:

public class PersonViewModel
{
  public string Name { get; set; }
  public string Company { get; set; }
}

public class ReverseConverter : IValueConverter
{
  public object Convert (object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
  {
    var s = value as string;
    if (s == null)
      return value;
    return new string (s.Reverse ().ToArray ());
  }

  public object ConvertBack (object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
  {
    var s = value as string;
    if (s == null)
      return value;
    return new string (s.Reverse ().ToArray ());
  }
}

var label = new Label ();
PersonViewModel person;
label.BindingContext = person = new PersonViewModel { Name = "John Doe", Company= "Xamarin" };
label.SetBinding (Label.TextProperty, new Binding ("Name", mode: BindingMode.TwoWay, converter: new ReverseConverter ()));
Debug.WriteLine (label.Text); //prints "eoD nhoJ". ReverseConverter.Convert () is invoked in this case.

label.Text = "ooF";
Debug.WriteLine (person.Name); //prints "Foo". ReverseConverter.ConvertBack () is invoked in this case. The label Text change is propagated back as the BindingMode is TwoWay.