IXRApplication::CreateHostFromXaml (Compact 2013)

Статья
04/19/2017

3/28/2014

This method parses the source XAML, generates an element tree, and instantiates a visual host that hosts the element tree so that an application can access or modify the elements in that tree.

Syntax

virtual HRESULT STDMETHODCALLTYPE  CreateHostFromXaml(
    XRXamlSource*         pSource,
    XRWindowCreateParams* pCreateParams,
    IXRVisualHost**       ppHost
) = 0;

Parameters

pSource
[in] Pointer to an XRXamlSource structure that contains information that represents the source of the XAML markup.

pCreateParams
[in] Pointer to an XRWindowCreateParams structure that includes parameters that are used to create the host window. This parameter is optional.

ppHost
[out] Pointer to the newly created IXRVisualHost host object that hosts the generated element tree in a window.

Return Value

Returns an HRESULT that indicates success or failure.

When a XAML parser error occurs, this method can also return one of the following error messages:

Error message	Description
XR_E_PARSER_MISSING_DEFAULT_NAMESPACE	The root element of the source XAML is missing the default namespace declaration.
XR_E_PARSER_UNKNOWN_ELEMENT	The element that is being parsed is unknown to XAML for Windows Embedded.
XR_E_PARSER_UNKNOWN_ATTRIBUTE	The attribute that is being parsed is unknown to XAML for Windows Embedded.
XR_E_PARSER_UNKNOWN_NAMESPACE	The element or attribute that is being parsed belongs to an unknown namespace.
XR_E_PARSER_INVALID_PROPERTY	The property that is being parsed is invalid in this context.
XR_E_PARSER_MULTIPLE_PROPERTY_ELEMENT_VALUES	There are multiple property element values for the given element. For example: `<a><a.b>text1</a.b><a.b>text2</a.b></a>`
XR_E_PARSER_INVALID_ATTRIBUTE	Both x:Name and Name cannot be specified on an element.
XR_E_PARSER_INVALID_ATTRIBUTE_VALUE	The value for this attribute is invalid.
XR_E_PARSER_ATTRIBUTE_OUT_OF_RANGE	The value for this attribute is out of acceptable range.
XR_E_PARSER_ATTRIBUTE_READONLY	This attribute is read-only and cannot be set in XAML.
XR_E_PARSER_FAILED_RESOURCE_FIND	The static resource could not be resolved.
XR_E_PARSER_RESOURCE_KEY_AND_NAME_SET	Both x:Key and x:Name attributes cannot be set in this element inside a resource dictionary.
XR_E_PARSER_TEXT_CONTENT_UNSUPPORTED	This content for this element cannot be text.
XR_E_PARSER_INVALID_CONTENT	The content for this element is invalid.

Remarks

This method assists in integrating a XAML for Windows Embedded application together with the UI controls and UI resources defined in XAML.

If you want to create a visual host and already have an element tree, call IXRApplication::CreateHostFromElementTree instead of this method.

If you want to create an element tree only, call IXRApplication::ParseXaml instead of this method.

Note

Boolean data types defined in the source XAML file being parsed are case-sensitive and must be in the correct case. For example, "True" and "False."

.NET Framework Equivalent

None.

Requirements

Header	XamlRuntime.h
sysgen	SYSGEN_XAML_RUNTIME

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