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How can I add an attribute to an HTML element and change its value at runtime?

 

The attributes to the HTML elements can be added using the Add method of the Attributes property, as shown in the code snippet below.

C#

// textBox is an INPUT element of type 'text' in the HTML document

if(this.textBox.Attributes.Contains("style") == false)

this.textBox.Attributes.Add("style");

VB

' textBox is an INPUT element of type 'text' in the HTML document

If Me.textBox.Attributes.Contains("style") = False Then

Me.textBox.Attributes.Add("style")

End If

The element's attribute can be changed at run time by assigning a suitable value to the Value property of that particular attribute, as shown in the code snippet below.

C#

// textBox is an INPUT element of type 'text' in the HTML document

this.textBox.Attributes["style"].Value = "background-color:red";

VB

' textBox is an INPUT element of type 'text' in the HTML document

Private Me.textBox.Attributes("style").Value = "background-color:red"

Article ID: Published Date: Last Revised Date: Platform: Control:
792 04/30/2011 07/10/2014 Windows Forms HTMLUIControl
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