ControlCollection.IndexOf(Control) Method
Definition
Important
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Retrieves the index of a specified Control object in the collection.
public:
virtual int IndexOf(System::Web::UI::Control ^ value);
public virtual int IndexOf (System.Web.UI.Control value);
abstract member IndexOf : System.Web.UI.Control -> int
override this.IndexOf : System.Web.UI.Control -> int
Public Overridable Function IndexOf (value As Control) As Integer
Parameters
Returns
The index of the specified server control. If the server control is not currently a member of the collection, it returns -1.
Examples
The following code example uses the IndexOf method to write the index location of a control, myLiteralControl
, in the ControlCollection collection of a Button control named myButton
.
// Create a LiteralControl and use the Add method to add it
// to a button's ControlCollection, then use the AddAt method
// to add another LiteralControl to the collection at the
// index location of 1.
LiteralControl myLiteralControl = new LiteralControl("ChildControl1");
myButton.Controls.Add(myLiteralControl);
myButton.Controls.AddAt(1,new LiteralControl("ChildControl2"));
Response.Write("<b>ChildControl2 is added at index 1</b>");
// Get the Index location of the myLiteralControl LiteralControl
// and write it to the page.
Response.Write("<br /><b>Index of the ChildControl myLiteralControl is " +
"</b>" + myButton.Controls.IndexOf(myLiteralControl));
' Create a LiteralControl and use the Add method to add it
' to a button's ControlCollection, then use the AddAt method
' to add another LiteralControl to the collection at the
' index location of 1.
Dim myLiteralControl As LiteralControl = _
new LiteralControl("ChildControl1")
myButton.Controls.Add(myLiteralControl)
myButton.Controls.AddAt(1,new LiteralControl("ChildControl2"))
Response.Write("<b>ChildControl2 is added at index 1</b>")
' Get the Index location of the myLiteralControl LiteralControl
' and write it to the page.
Response.Write("<br /><b>Index of the ChildControl myLiteralControl is </b>" & _
myButton.Controls.IndexOf(myLiteralControl))
Remarks
Use this method to determine the index location of the specified server control in the ControlCollection object.
Applies to
See also
.NET
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