Question

I would like to use the find control method to find a image on the designer and make it visible, but i keep getting a null

This is my Code:

foreach (ImageShow image in imageList)
{
    Image Showimage = (Image)FindControl(image.imageName);
    Showimage.Visible = true;
}

Any help would be much appreciated,
Thanks in advance

Answer 1

FindControl does not search throughout a hierarchy of controls, I presume that this is a problem.

try using the following method :

public static T FindControlRecursive<T>(Control holder, string controlID) where T : Control
{
  Control foundControl = null;
  foreach (Control ctrl in holder.Controls)
  {
    if (ctrl.GetType().Equals(typeof(T)) &&
      (string.IsNullOrEmpty(controlID) || (!string.IsNullOrEmpty(controlID) && ctrl.ID.Equals(controlID))))
    {
      foundControl = ctrl;
    }
    else if (ctrl.Controls.Count > 0)
    {
      foundControl = FindControlRecursive<T>(ctrl, controlID);
    }
    if (foundControl != null)
      break;
  }
  return (T)foundControl;
}

Usage:

Image Showimage = FindControlRecursive<Image>(parent, image.imageName);

In your case parent is this, example :

Image Showimage = FindControlRecursive<Image>(this, image.imageName);

You can use it without ID, then will find first occurrence of T :

Image Showimage = FindControlRecursive<Image>(this, string.Empty);