ExpressionEditor::ExpressionPrefix Property
Gets the expression prefix that identifies expression strings that are supported by the expression editor implementation.
Assembly: System.Design (in System.Design.dll)
Property Value
Type: System::StringA string representing the prefix for expressions supported by the class derived from the ExpressionEditor; otherwise, an empty string (""), if the expression editor does not have an associated expression prefix.
The expression prefix identifies the custom expression type and associates an expression with the expression builder and expression editor. When custom expressions are parsed in a page, the expression prefix is used to create instances of the associated ExpressionBuilder and ExpressionEditor classes. To associate an expression prefix with an expression builder and expression editor, apply the ExpressionEditorAttribute and ExpressionPrefixAttribute attributes to the custom ExpressionBuilder class and configure the expression prefix for an expression builder in the expressionBuilders element in the Web configuration file.
Typically, derived classes do not override the ExpressionPrefix property. The base ExpressionEditor class sets the ExpressionPrefix value based on the ExpressionPrefixAttribute attribute for the associated ExpressionBuilder object.
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.