IXRUIElementCollection::IndexOf (Compact 2013)

Article
04/19/2017

3/28/2014

This method searches for the specified item and retrieves the zero-based index of its occurrence within the IXRUIElementCollection collection.

Syntax

virtual HRESULT STDMETHODCALLTYPE IndexOf(
    __in IXRUIElement* pObject,
    __out_opt int* pIndex
) = 0;

Parameters

pObject
[in] Pointer to an IXRUIElement object that represents an item to locate in this collection.

pIndex
[out] Pointer to an integer value that indicates the zero-based index of the location of pObject within this collection.

Return Value

Returns S_OK if successful; otherwise, returns an HRESULT error code. For common error codes for XAML for Windows Embedded, see XAML for Windows Embedded Error Messages.

Remarks

This method performs a linear search through the collection. Therefore, the average execution time is proportional to the number of items. You can retrieve the number of items by using IXRUIElementCollection::GetCount.

By default, this method searches the collection starting at the first item, and ending at the last item. Because an object cannot exist more than once in a visual tree, an item can occur only once in this object collection.

.NET Framework Equivalent

System.Windows.PresentationFrameworkCollection(T).IList.IndexOf

Requirements

Header	XamlRuntime.h
sysgen	SYSGEN_XAML_RUNTIME

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