private void Init()
{
this.Controls.Clear();
_ddbTempClass = new RadDropDownList();
_btnRefresh = new RadButton();
_listOverview = new RadListView();
LoadLayoutTemplateName();
CreatDropControls();
InitRefreshBtn();
CreatListView();
this.Controls.Add(_ddbTempClass);
this.Controls.Add(_btnRefresh);
this.Controls.Add(_listOverview);
_listOverview.BringToFront();
}