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HtmlTextWriter.IsAttributeDefined Method (HtmlTextWriterAttribute, String)

Determines whether the specified markup attribute and its value are rendered during the next call to the RenderBeginTag method.

Namespace:  System.Web.UI
Assembly:  System.Web (in System.Web.dll)

protected bool IsAttributeDefined(
	HtmlTextWriterAttribute key,
	out string value


Type: System.Web.UI.HtmlTextWriterAttribute

The HtmlTextWriterAttribute associated with the markup attribute.

Type: System.String

The value assigned to the attribute.

Return Value

Type: System.Boolean
true if the attribute is rendered during the next call to the RenderBeginTag method; otherwise, false.

If the IsAttributeDefined method returns true, the value to be assigned to the HtmlTextWriterAttribute object is returned in the value parameter.

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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