WebControl.Attributes Property
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Gets the collection of arbitrary attributes (for rendering only) that do not correspond to properties on the control.
public:
property System::Web::UI::AttributeCollection ^ Attributes { System::Web::UI::AttributeCollection ^ get(); };[System.ComponentModel.Browsable(false)]
public System.Web.UI.AttributeCollection Attributes { get; }[<System.ComponentModel.Browsable(false)>]
member this.Attributes : System.Web.UI.AttributeCollectionPublic ReadOnly Property Attributes As AttributeCollectionProperty Value
A AttributeCollection of name and value pairs.
- Attributes
Examples
The following example illustrates how the Attributes property of a WebControl can be used to run a JavaScript command when the TextBox control loses focus.
Note
The following code sample uses the single-file code model and may not work correctly if copied directly into a code-behind file. This code sample must be copied into an empty text file that has an .aspx extension. For more information on the Web Forms code model, see ASP.NET Web Forms Page Code Model.
Important
This example has a text box that accepts user input, which is a potential security threat. By default, ASP.NET Web pages validate that user input does not include script or HTML elements. For more information, see Script Exploits Overview.
<%@ Page Language="C#" AutoEventWireup="True" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Attributes Property of a Web Control</title>
<script language="C#" runat="server">
void Page_Load(Object sender, EventArgs e) {
TextBox1.Attributes["onblur"]="javascript:alert('Hello! Focus lost from text box!!');";
}
</script>
</head>
<body>
<h3>Attributes Property of a Web Control</h3>
<form id="form1" runat="server">
<asp:TextBox id="TextBox1" columns="54"
Text="Click here and then tap out of this text box"
runat="server"/>
</form>
</body>
</html>
<%@ Page Language="VB" AutoEventWireup="True" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Attributes Property of a Web Control</title>
<script language="VB" runat="server">
Sub Page_Load(sender As Object, e As EventArgs)
TextBox1.Attributes("onblur") = "javascript:alert('Hello! Focus lost from text box!!');"
End Sub
</script>
</head>
<body>
<h3>Attributes Property of a Web Control</h3>
<form id="form1" runat="server">
<asp:TextBox id="TextBox1" columns="54"
Text="Click here and then tap out of this text box"
runat="server"/>
</form>
</body>
</html>
Remarks
The Attributes collection contains a collection of all attributes declared in the opening tag of a Web server control. This allows you to programmatically control the attributes associated with a Web server control. You can add attributes to the collection or remove attributes from the collection.
Note
This property is rendered with all attributes in the collection in the control's opening tag, regardless of the browser settings. Not all browsers support every attribute that is rendered. The unsupported attributes are usually ignored by the browser.
Note
You cannot add client-side script to a WebControl instance using the Attributes collection. To add client-side script, use the ClientScript property on the Page control.
