ControlCollection.IndexOf(Control) Method

Reference

Definition

Namespace:: System.Web.UI

Assembly:: System.Web.dll

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

value: Control

The Control for which the index is returned.

Returns

Int32

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

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