DataBind and PageLoad

[autofill]

2 scenario inside a WebUserControl. I want to know why Microsoft and so many
book doesn't suggest us to work like that. This control going to be in my
page and I will call the DataBind of my user control.

PAGE
page_load(....)
{
if(!IsPostBack)
{
this.WebUserControl1.DataBind();
or also depend what you realy want
DataBind();
}
}

CONTROL

...first scenario
page_load(....)
{
if(!IsPostBack)
{
LoadData(Table);
this.dtgMain.DataSource = Table;
this.dtgMain.DataBind();
}
}
....second scenario
override DataBind(....)
{
LoadData(Table);
this.dtgMain.DataSource = Table;
this.dtgMain.DataBind();
.... and sometime
base.DataBind();
}

Should be a good idea to fallow the same pattern for the HTML then for the
codebehind!! I mean in html only when you databind that the value are set
for the <%#%>.
It is using DataBind method in bad way?