ControlCollection.IndexOf(Control) Method
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.
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
Feedback
https://aka.ms/ContentUserFeedback.
Kommer snart: I hele 2024 udfaser vi GitHub-problemer som feedbackmekanisme for indhold og erstatter det med et nyt feedbacksystem. Du kan få flere oplysninger under:Indsend og få vist feedback om