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ControlCollection.Add Method

Adds the specified Control object to the collection.

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

public virtual void Add(
	Control child
)

Parameters

child
Type: System.Web.UI.Control
The Control to add to the collection.

ExceptionCondition
ArgumentNullException

Thrown if the child parameter does not specify a control.

HttpException

Thrown if the ControlCollection is read-only.

The new control is added to the end of an ordinal index array. The control can be an instance of any ASP.NET server control, a custom server control you create, or a literal control.

To add a control to the collection at a specific index location, use the AddAt method.

The following code example uses the Add method to add a series of template items, the number of which are taken from the server control's view state, to a custom templated control.


// Override to create repeated items.
protected override void CreateChildControls() {
    object o = ViewState["NumItems"];
    if (o != null) {
       // Clear any existing child controls.
       Controls.Clear();

       int numItems = (int)o;
       for (int i=0; i < numItems; i++) {
          // Create an item.
          RepeaterItem item = new RepeaterItem(i, null);
          // Initialize the item from the template.
          ItemTemplate.InstantiateIn(item);
          // Add the item to the ControlCollection.
          Controls.Add(item);
       }
    }
}


.NET Framework

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

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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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