下拉框下的树形结构数据的绑定

privatevoid BindDropDownList() { DataTable dtSite; /* Get data here * dtSite = ... * */ DataRow[] dr = dtSite.Select("PARENTID=0"); for (int i=0; i<dr.Length; i++) { //ddlSite is your DropDownList control ddlSite.Items.Add(new ListItem(dr["NAME"].ToString(), dr["ID"].ToString())); this.BindData(ddlSite, dtSite, dr["PARENTID"].ToString(), "　"); } } privatevoid BindData(DropDownList ddlSite, DataTable dt, string parentID, string blank) { DataRow[] dr = dtSite.Select("PARENTID="+ parentID.ToString()); for (int i=0; i<dr.Length; i++) { DropDownList ddlSite =new DropDownList(); //ddlSite is your DropDownList control ddlSite.Items.Add(new ListItem(blank + dr["NAME"].ToString(), dr["ID"].ToString())); this.BindData(ddlSite, dtSite, dr["PARENTID"].ToString(), blank +"　"); } }