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Control.EnsureChildControls Method

Determines whether the server control contains child controls. If it does not, it creates child controls.

Namespace: System.Web.UI
Assembly: System.Web (in system.web.dll)
protected virtual void EnsureChildControls ()
protected void EnsureChildControls ()
protected function EnsureChildControls ()
Not applicable.

This method first checks the current value of the ChildControlsCreated property. If this value is false, the CreateChildControls method is called.

ASP.NET calls this method when it needs to make sure that child controls have been created. In most cases, custom server control developers do not need to override this method. If you do override this method, use it in a similar fashion as its default behavior.

The following example uses the EnsureChildControls method to ensure that the current server control has child controls. It then gets or sets a Text property for a child TextBox Web control in the current server control's ControlCollection object.

Security noteSecurity Note:

This example has a text box that accepts user input, which is a potential security threat. By default, ASP.NET Web pages validate that user input does not include script or HTML elements. For more information, see Script Exploits Overview (Visual Studio).

// Ensure the current control has children,
// then get or set the Text property.
 public int Value {
    get {
        this.EnsureChildControls();
        return Int32.Parse(((TextBox)Controls[1]).Text);
    }
    set {
        this.EnsureChildControls();
        ((TextBox)Controls[1]).Text = value.ToString();
    }
 }


// Ensure the current control has children,
// then get or set the Text property.
/** @property 
 */
public int get_Value()
{
    this.EnsureChildControls();
    return Int32.Parse(((TextBox)(get_Controls().get_Item(1))).get_Text());
} //get_Value

/** @property 
 */
public void set_Value(int value)
{
    this.EnsureChildControls();
    ((TextBox)get_Controls().get_Item(1)).set_Text(((Int32)value).ToString());
} //set_Value

// Ensure the current control has children,
// then get or set the Text property.
 public function get Value() : int
 {
       this.EnsureChildControls();
       return Int32.Parse(TextBox(Controls[1]).Text);
 }

 public function set Value(value : int)
 {
        this.EnsureChildControls();
        TextBox(Controls[1]).Text = value.ToString();
 }

Windows 98, Windows Server 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

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