Refresh Listpage from Child form AX 2012

Write your code in Child form by Override method Close and write the below code.

public void close()
{
#Task
FormRun formRun;

super();

// Get an instance of the calling form.
formRun = element.args().caller();

// If the caller is a form, refresh that form.
if(formRun)
{
formRun.task(#taskF5);
}
}