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ControlCollection.AddAt Method

Adds the specified Control object to the collection at the specified index location.

Namespace:  System.Web.UI
Assembly:  System.Web (in System.Web.dll)

public virtual void AddAt(
	int index,
	Control child
)

Parameters

index
Type: System.Int32

The location in the array at which to add the child control.

child
Type: System.Web.UI.Control

The Control to add to the collection.

ExceptionCondition
ArgumentNullException

The child parameter does not specify a control.

ArgumentOutOfRangeException

The index parameter is less than zero or greater than the ControlCollection.Count property.

HttpException

The ControlCollection is read-only.

The added control can be an instance of any ASP.NET server control, a custom server control you create, or a literal control.

The following code example uses the AddAt method to create a new LiteralControl named ChildControl2 and add it to the myButton control's ControlCollection collection at the index location of 1.

// 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));

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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