Layer.Opacity Property
Gets or sets a value that specifies the opacity of the layer.
Syntax
public System.Double Opacity { get; set; }Property Value
Default: 1.0
An opacity value between 0.0 (completely transparent) and 1.0 (completely opaque).
Remarks
This property is used to make a layer semi-transparent. The opacity value will be multiplied to the alpha value of the colors used for rendering features from this layer.
The opacity value is also propagated and multiplied to the opacity value of sub-layers. For instance, if a LayerSet and one of its child layers both have opacity 0.5, features from the child layer will be rendered with an opacity of 0.25.
This property is not supported in the following cases:
Changing opacity of sub-layers of a BitmapLayer is supported, but changing the opacity of the BitmapLayer itself is not.
Changing opacity of sub-layers of a LabelOrganizingLayer is not supported, unless there is a also a TileLayer between the sub-layer and the LabelOrganizingLayer. Changing the opacity of the LabelOrganizingLayer itself is supported. The same rules also apply to AggregatingLayer.
Changing opacity of sub-layers of a OgcWmsLayer is not supported. Changing the opacity of the OgcWmsLayer itself is supported.
In cases where the property is not supported, the behavior will be the same as if the opacity is set to 1.0.
Example
// Set the layer transparent
public static void SetLayerTransparent(Layer layer)
{
// Set the opacity of 0.5
layer.Opacity = 0.5;
}
Platforms
Windows, Linux, Android