protected void Page_Load(object sender, EventArgs e)
{if(!IsPostBack){
userinfor user = new userinfor();
DataSet ds = user.arealist();
Drlarea.DataSource = ds.Tables[0].DefaultView; Drlarea.DataTextField = "P_areaname";
Drlarea.DataValueField = "ID";
Drlarea.DataBind();
DataSet ds2 = user.classlist();
Drlclass.DataSource = ds2.Tables[0].DefaultView;
Drlclass.DataTextField = "P_productclass";
Drlclass.DataValueField = "ID";
Drlclass.DataBind();
Drlclass.Items.Insert(0,new ListItem("请选择分类"));
Drpnext.Items.Insert(0, new ListItem("请选择子分类"));
}
}
protected void Drlclass_SelectedIndexChanged(object sender, EventArgs e)
{
int ID =Convert .ToInt32(Drlclass.SelectedValue);
userinfor user = new userinfor();
DataSet ds = user.classnextlist(ID);
Drpnext.DataSource = ds.Tables[0].DefaultView;
Drpnext.DataTextField = "P_nextclass";
Drpnext.DataValueField = "ID";
Drpnext.DataBind();
}