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Control.ID Property

  • Reference

Definition

Namespace:
System.Web.UI
Assembly:
System.Web.dll

Gets or sets the programmatic identifier assigned to the server control.

public:
 virtual property System::String ^ ID { System::String ^ get(); void set(System::String ^ value); };
public virtual string ID { get; set; }
[System.Web.UI.Themeable(false)]
public virtual string ID { get; set; }
member this.ID : string with get, set
[<System.Web.UI.Themeable(false)>]
member this.ID : string with get, set
Public Overridable Property ID As String

Property Value

String

The programmatic identifier assigned to the control.

Attributes
ThemeableAttribute

Examples

void Page_Init(object sender,EventArgs e)
{
   // Add a event Handler for 'Init'.
   myControl.Init += new System.EventHandler(Control_Init);
}

void Control_Init(object sender,EventArgs e)
{ 
  Response.Write("The ID of the object initially : " + myControl.ID);      
  // Change the ID property.
   myControl.ID="TestControl";
   Response.Write("<br />The changed ID : " + myControl.ID);
}

Sub Page_Init(sender As Object, e As EventArgs)
   ' Add a event Handler for 'Init'.
   AddHandler myControl.Init, AddressOf Control_Init
End Sub

Sub Control_Init(sender As Object, e As EventArgs)
   Response.Write(("The ID of the object initially : " + myControl.ID))
   ' Change the ID property.
   myControl.ID = "TestControl"
   Response.Write(("<br />The changed ID : " + myControl.ID))
End Sub

Remarks

Setting this property on a server control provides you with programmatic access to the server control's properties, events, and methods. This property can be set by Web developers by declaring an ID attribute in the opening tag of an ASP.NET server control.

If this property is not specified for a server control, either declaratively or programmatically, you can obtain a reference to the control through its parent control's Controls property.

Note

Only combinations of alphanumeric characters and the underscore character ( _ ) are valid values for this property. Including spaces or other invalid characters will cause an ASP.NET page parser error.

Applies to

See also