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XAML Field Modifiers in Xamarin.Forms

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The x:FieldModifier namespace attribute specifies the access level for generated fields for named XAML elements. Valid values of the attribute are:

  • private – specifies that the generated field for the XAML element is accessible only within the body of the class in which it is declared.
  • public – specifies that the generated field for the XAML element has no access restrictions.
  • protected – specifies that the generated field for the XAML element is accessible within its class and by derived class instances.
  • internal – specifies that the generated field for the XAML element is accessible only within types in the same assembly.
  • notpublic – specifies that the generated field for the XAML element is accessible only within types in the same assembly.

By default, if the value of the attribute isn't set, the generated field for the element will be private.

Note

The value of the attribute can use any casing, as it will be converted to lowercase by Xamarin.Forms.

The following conditions must be met for an x:FieldModifier attribute to be processed:

  • The top-level XAML element must be a valid x:Class.
  • The current XAML element has an x:Name specified.

The following XAML shows examples of setting the attribute:

<Label x:Name="privateLabel" />
<Label x:Name="internalLabel" x:FieldModifier="internal" />
<Label x:Name="publicLabel" x:FieldModifier="public" />

Important

The x:FieldModifier attribute cannot be used to specify the access level of a XAML class.