From UserControl page, Call Page_Prerender in Pare

I have a aspx page name MakeRedemption.aspx, in which have a UserControl (Search.ascx).

There is Page_Prerender() in the MakeRedemption.aspx.

I would like to ask, how can I call the Page_Prerender() from MakeRedemption.aspx, by a function in Search.ascx.

It is something as follow :

Actually there is a looping in one of the function in my User Control page.

The Page_Prerender (MakeRedemption.aspx) will trigger after all the loop finish.

What I want is : Everytime before end of each itme of the loop, I will like to trigger the Page_Prerender on the MakeRedemption.aspx to do something.
Something like :

for (int i = 0 ; i < 10 ; i ++)
{
//some code here

// I would like to trigger Page_Prerender here to do something before end of the loop.
}  // the Page_Prerender (in MakeRedemption.aspx) trigger after all the loop finish.

Means that, this for loop has i = 10, thus, I would like to trigger the Page_Prerender 10 times inside the for loop.

My PreRender function in the aspx file is as follow :

protected void Page_Prerender(object sender, EventArgs e)
    {
        //some code here
    }

Not sure this Page_Prerender() is consider as the auto generate OnPreRender() or not.

I would like to trigger this Page_Prerender() instead of OnPreRender() .

Sorry if I am asking a stupid question, I am new in programming and c#.

Kindly advise.

Thanks.

Finally i find the way to do it, the oodng is as follow : Add this following code in the aspx.cs page:

delegate void DelMethodWithoutParam();

protected void Page_Load(object sender, EventArgs e)
    {
        DelMethodWithoutParam delParam = new DelMethodWithoutParam(Page_prerender);
        this.ucSearchGifts.PageMethodWithNoParamRef = delParam;
    }
Page_prerender(){
//some code here...

}

and add this following code in the user control cs page:

private System.Delegate _delNoParam;
    public Delegate PageMethodWithNoParamRef
    {
        set { _delNoParam = value; }
    }

    protected void Button1_Click(object sender, EventArgs e)
    {
        _delNoParam.DynamicInvoke();
    }

When click on the Button1 in user control page, the Page_prerender() in aspx page, which is parent page, will be trigger.