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Control.ChildControlsCreated Property

Gets a value that indicates whether the server control's child controls have been created.

[Visual Basic]
Protected Property ChildControlsCreated As Boolean
[C#]
protected bool ChildControlsCreated {get; set;}
[C++]
protected: __property bool get_ChildControlsCreated();
protected: __property void set_ChildControlsCreated(bool);
[JScript]
protected function get ChildControlsCreated() : Boolean;
protected function set ChildControlsCreated(Boolean);

Property Value

true if child controls have been created; otherwise, false.

Example

The following example demonstrates an override of the OnDataBinding method. To ensure that child controls are not created until data binding occurs again, the ChildControlsCreated property is set to true once the RepeaterItem objects are created and added to the control's ControlCollection object.

[Visual Basic] 
' Override to create the repeated items from the DataSource.
Protected Overrides Sub OnDataBinding(E As EventArgs)
    MyBase.OnDataBinding(e)

    If Not DataSource Is Nothing
        ' Clear any existing child controls.
        Controls.Clear()
        ' Clear any previous view state for the existing child controls.
        ClearChildViewState()

        ' Iterate over the DataSource, creating a new item for each data item.
        Dim DataEnum As IEnumerator = DataSource.GetEnumerator()
        Dim I As Integer = 0
        Do While (DataEnum.MoveNext())

            ' Create an item.
            Dim Item As RepeaterItemVB = New RepeaterItemVB(I, DataEnum.Current)
            ' Initialize the item from the template.
            ItemTemplate.InstantiateIn(Item)
            ' Add the item to the ControlCollection.
            Controls.Add(Item)

            I = I + 1
        Loop

        ' Prevent child controls from being created again.
        ChildControlsCreated = true
        ' Store the number of items created in view state for postback scenarios.
        ViewState("NumItems") = I
    End If
End Sub

[C#] 
// Override to create the repeated items from the DataSource.
protected override void OnDataBinding(EventArgs e) {
    base.OnDataBinding(e);

    if (DataSource != null) {
        // Clear any existing child controls.
        Controls.Clear();
        // Clear any previous view state for the existing child controls.
        ClearChildViewState();

        // Iterate over the DataSource, creating a new item for each data item.
        IEnumerator dataEnum = DataSource.GetEnumerator();
        int i = 0;
        while(dataEnum.MoveNext()) {

            // Create an item.
            RepeaterItem item = new RepeaterItem(i, dataEnum.Current);
            // Initialize the item from the template.
            ItemTemplate.InstantiateIn(item);
            // Add the item to the ControlCollection.
            Controls.Add(item);

            i++;
        }

        // Prevent child controls from being created again.
        ChildControlsCreated = true;
        // Store the number of items created in view state for postback scenarios.
        ViewState["NumItems"] = i;
    }
}

[C++] 
// Override to create the repeated items from the DataSource.
protected:
void OnDataBinding(EventArgs * e) 
{
   __super::OnDataBinding(e);

   if (DataSource != 0) 
   {
      // Clear any existing child controls.
      Controls->Clear();
      // Clear any previous view state for the existing child controls.
      ClearChildViewState();

      // Iterate over the DataSource, creating a new item for each data item.
      IEnumerator* dataEnum = DataSource->GetEnumerator();
      int i = 0;
      while(dataEnum->MoveNext()) 
      {
         // Create an item.
         RepeaterItem* item = new RepeaterItem(i, dataEnum->Current);
         // Initialize the item from the template.
         ItemTemplate->InstantiateIn(item);
         // Add the item to the ControlCollection.
         Controls->Add(item);
         i++;
      }

      // Prevent child controls from being created again.
      ChildControlsCreated = true;
      // Store the number of items created in view state for postback scenarios.
      ViewState->Item[S"NumItems"] = __box(i);
   }
}

[JScript] 
// Override to create the repeated items from the DataSource.
protected override function OnDataBinding(e : EventArgs) {
    super.OnDataBinding(e);

    if (DataSource != null) {
        // Clear any existing child controls.
        Controls.Clear();
        // Clear any previous view state for the existing child controls.
        ClearChildViewState();

        // Iterate over the DataSource, creating a new item for each data item.
        var dataEnum : IEnumerator = DataSource.GetEnumerator();
        var i : int = 0;
        while(dataEnum.MoveNext()) {

            // Create an item.
            var item : RepeaterItem = new RepeaterItem(i, dataEnum.Current);
            // Initialize the item from the template.
            ItemTemplate.InstantiateIn(item);
            // Add the item to the ControlCollection.
            Controls.Add(item);

            i++;
        }

        // Prevent child controls from being created again.
        ChildControlsCreated = true;
        // Store the number of items created in view state for postback scenarios.
        ViewState["NumItems"] = i;
    }
}

Requirements

Platforms: Windows 2000, Windows XP Professional, Windows Server 2003 family

See Also

Control Class | Control Members | System.Web.UI Namespace | CreateChildControls

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