AttributeCollection.Item[String] Property

Reference

Definition

Namespace:: System.Web.UI

Assembly:: System.Web.dll

Important

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Gets or sets a specified attribute value for a server control.

public:
 property System::String ^ default[System::String ^] { System::String ^ get(System::String ^ key); void set(System::String ^ key, System::String ^ value); };

public string this[string key] { get; set; }

member this.Item(string) : string with get, set

Default Public Property Item(key As String) As String

Parameters

key: String

The ___location of the attribute in the collection.

Property Value

String

The attribute value.

Examples

The following example shows how to set a dynamic HTML onblur attribute to run an ECMAScript (JavaScript) command when a TextBox Web server control loses focus.

<!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 runat="server">
    <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 tab out of this text box" 
    runat="server"/>  

</form>
</body>
</html>

<!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 runat="server">
    <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 tab out of this text box" 
    runat="server"/>  

</form>
</body>
</html>

Remarks

You can add an attribute to or retrieve one from an ASP.NET server control that uses this property.

Applies to

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