Find an Image Button in ASP.NET

Good Morning All

I have the following code that find the controls in my page

Code:

---

Find Windows Control
        Control control = null, c = null;

        foreach (string ctl in Page.Request.Form)
        {
            c = Page.FindControl(ctl);
            if (c is System.Web.UI.WebControls.Button)
            {
                control = c;
                break;
            }
        }

---

this Works for buttons i have my form , so i have changed my page and i have added image buttons and i want find them in my page like this

Code:

---

Control control = null, c = null;
     
        foreach(string ctl in Page.Request.Form)
        {
            c = Page.FindControl(ctl);
            if (c is System.Web.UI.WebControls.ImageButton)
            {
                control = c;
                break; 
            }
        }

---

This does not work, the image buttons in my page are not found the "control " is always null.

and the above code i have to use it here

Code:

---

if ((control == null) || ((!(control.ID.Contains("btnApplyToSelected_"))) && (!(control.ID.Contains("btnSaveConstraints_")))))
        {
            lstbxFilter_SelectedIndexChanged(sender, e);
            loadConstraintsXM();
        }

---

Thank you