Programmatically Adding a User Control to ASP.NET

Question

I have a user control that needs to load a child control when a button is clicked. The problem is that it needs to request a control from another class.

So, in the button click event, I call the function to get my control, and add it to the page, for example:

UserControl ctrl = ExampleDataProvider.GetControl(some params...);
myDetailPane.Controls.Add(ctrl);

The GetControl method looks like this:

public static UserControl GetControl(some params...)
        {
            ExampleDetailPane ctrl = new ExampleDetailPane();
            ctrl.Value = "12";
            ctrl.Comment = string.Empty;
            return ctrl;
        }

This does not work because of the page life cycle — the child_Load page of the control is launched and its controls are set to zero.

I seem to know that my approach is wrong and why, but I don’t know how best to fix it! Can anyone help?

Answer 1

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Answer 2

Page_Init. Button_Click .

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http://msdn.microsoft.com/en-us/library/ms178472.aspx.

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Answer 3

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• You can open another window, although obviously it can be blocked by pop-up blockers.

Answer 4

If you want to access your control in PostBack or want to bind an event, you must create it in the CreateChildControls () method.

    private UserControl _uc = null;

/// <summary>
    /// Creates all controls.
    /// </summary>
    /// <remarks>All the controls must be created in this method for the event handler</remarks>
    protected override void CreateChildControls()
    {
        _uc = new UserControl ();

        this.Controls.Add(_uc);
        base.CreateChildControls();
    }