Pooja PoojariandAndy De George
692293bda8
* Updated H2 and column headers. * Metadata update. * Minor edits. * Apply suggestions from code review Co-authored-by: Andy (Steve) De George <[email protected]>
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title, description, ms.date, ms.custom, f1_keywords, helpviewer_keywords, ms.assetid
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| {} Escape Sequence - Markup Extension | Learn about the Escape Sequence. | 03/30/2017 | devdivchpfy22 |
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{} Escape sequence / markup extension
Provides the XAML escape sequence for attribute values. The escape sequence allows the subsequent values in the attribute to be interpreted as a literal.
XAML Attribute Usage
<object property="{} literalValue" .../>
XAML Property Element Usage
<object>
<object.property>
{} literalValue
</object.property>
</object>
XAML Values
| Value | Description |
|---|---|
| literalValue | The literal string that follows the escape sequence. Typically this string contains an open or close brace ({ or }). |
Remarks
The escape sequence ({}) is used so that an open brace ({) can be used as a literal character in XAML.
XAML readers typically use the open brace ({) to denote the entry point of a markup extension; however, they first check the next character to determine whether it is a closing brace (}). Only when the two braces ({}) are adjacent, are they considered an escape sequence.
If the escape sequence is encountered, the XAML reader should process the remainder of the string as a string. However, if the escape sequence is applied to a member that has a type converter, the string might undergo type conversion when it is interpreted by a XAML writer.
The escape sequence is not a markup extension and is not backed by a class. However, it is a convention that XAML readers (including custom XAML readers) should respect.
A quotation mark (") cannot be used as an escape sequence in this manner. If you need to set a quotation mark as a property value for a noncontent property, use property element syntax and place the quotation mark as a string inside the property element, or use an XML character entity. For a content property, the quotation mark can be the entire content.
The escape sequence ({}) is frequently required when specifying an XML type that must include a namespace qualifier in a location where a XAML markup extension might appear. This location includes the start of a XAML attribute value, and in a markup extension immediately after an equal sign (=). The following example shows escape sequences for an XML namespace that appears at the start of a XAML attribute value.
[!code-xamlXLINQExample#StackPanelResources]