PrintCapabilities.PageResolutionCapability Property

Reference

Definition

Namespace:: System.Printing

Assembly:: ReachFramework.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Gets a collection of PageResolution objects that identify what levels of page resolution the printer supports.

public:
 property System::Collections::ObjectModel::ReadOnlyCollection<System::Printing::PageResolution ^> ^ PageResolutionCapability { System::Collections::ObjectModel::ReadOnlyCollection<System::Printing::PageResolution ^> ^ get(); };

public System.Collections.ObjectModel.ReadOnlyCollection<System.Printing.PageResolution> PageResolutionCapability { get; }

member this.PageResolutionCapability : System.Collections.ObjectModel.ReadOnlyCollection<System.Printing.PageResolution>

Public ReadOnly Property PageResolutionCapability As ReadOnlyCollection(Of PageResolution)

Property Value

ReadOnlyCollection<PageResolution>

A ReadOnlyCollection<T> of PageResolution objects. Each value represents a page resolution as a qualitative value, a dots-per-inch value, or both.

Examples

The following code example shows how to search for a particular value in the PageResolutionCapability.

foreach (PageResolution pageRes in pc.PageResolutionCapability)
    {
        if (pageRes.QualitativeResolution == PageQualitativeResolution.High)
        {
            Console.WriteLine("High quality is supported");
            break;
        }
    }

Remarks

Most of the properties of PrintCapabilities that have "Capability" at the end of the name, such as CollationCapability, are collections of values of an enumerated type. But PageMediaSizeCapability and PageResolutionCapability are collections of objects. For the latter two properties, you cannot test for the presence of a particular value by using the Contains method of ReadOnlyCollection<T>. This is because, with reference types, the method returns true only when the memory address of the object passed to it is the same as the address of an object in the collection; that is, they are the same object. Since this will not usually be the case, the method will nearly always return false even if there is an object in the collection with exactly the same values in all its properties as the object passed to the Contains method of ReadOnlyCollection<T>. To determine the contents of the PageResolutionCapability, you must enumerate through each of its members, comparing them with the desired value. See the example.

The PageResolution class has properties in which you can specify the dots-per-inch for the X and Y dimensions and a property where you can give a qualitative expression to the resolution.

If the printer does not support page resolution choices, the collection is empty.

This property corresponds to the Print Schema's PageResolution keyword.

Applies to

Dela via