Xamarin.Forms.Layout.GetSizeRequest Method
Returns the Xamarin.Forms.SizeRequest of the Layout. Calling this method begins the measure pass of a layout cycle.

Syntax

public override sealed SizeRequest GetSizeRequest (double widthConstraint, double heightConstraint)

See Also

Xamarin.Forms.OnSizeRequest (double, double)

Parameters

widthConstraint
The available width that a parent Layout can allocate to a child. Value will be between 0 and double.PositiveInfinity.
heightConstraint
The available height that a parent Layout can allocate to a child. Value will be between 0 and double.PositiveInfinity.

Returns

A Xamarin.Forms.SizeRequest which contains a requested size and a minimum size.

Remarks

Calling GetSizeRequest causes a measure pass to occur for the subtree of elements it is called on. It is ideal to only call GetSizeRequest when needed as excessive calls can negatively impact the performance of the app. Overriding GetSizeRequest should only be done if the developer wants to ignore Width/HeightRequest. More likely a subclass would wish to override VisualElement.OnSizeRequest (double, double).

Requirements

Namespace: Xamarin.Forms
Assembly: Xamarin.Forms.Core (in Xamarin.Forms.Core.dll)
Assembly Versions: 1.0.0.0, 1.1.0.0, 1.2.0.0, 1.3.0.0