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HtmlElement.SetAttribute Method

Sets the value of the named attribute on the element.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

public void SetAttribute(
	string attributeName,
	string value


Type: System.String
The name of the attribute to set.
Type: System.String
The new value of this attribute.

An attribute in HTML is any valid name-value pair for that element. HtmlElement exposes only those attributes that are common to all elements, leaving out those that only apply to certain types of elements; SRC is a predefined attribute for the IMG tag, for example, but not for the DIV tag. Use GetAttribute and SetAttribute to manipulate attributes not exposed on the managed Document Object Model (DOM).

If attributeName is not a defined attribute on an element, SetAttribute will define it on the element as a new attribute.

GetAttribute and SetAttribute are case-insensitive.

To set the class attribute on an HtmlElement , you must refer to the attribute as className when specifying the first argument to SetAttribute

The following code example adds a new IMG element to the current document, using SetAttribute to set the SRC attribute for the image.

		private void InsertImageFooter()
			if (webBrowser1.Document != null)
				HtmlDocument doc = webBrowser1.Document;
				HtmlElement elem = doc.CreateElement("IMG");
				elem.SetAttribute("SRC", "");


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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.