#region "绑定区域下拉菜单" /// <summary> /// 绑定树形节点 /// </summary> public void BindAreaDropDownList() { DataTable dt = new AreaBLL().GetData("", " Orderby ASC"); Areaddl.Items.Add(new ListItem("请选择", "0")); if (dt != null && dt.Rows.Count > 0) { foreach (DataRow row in dt.Rows) { if (!DBNull.Value.Equals(row["ParentID"]) && row["ParentID"].ToString() == "0")//绑定根节点 { this.Areaddl.Items.Add(new ListItem(row["Name"].ToString(), row["ID"].ToString())); this.bindDropChildItem(this.Areaddl, dt, row["ID"].ToString(), 1); } } } } /// <summary> /// 绑定子节点 /// </summary> /// <param name="drop">下拉菜单</param> /// <param name="arealist">查询到的数据集</param> /// <param name="id">当前的父节点</param> /// <param name="length">长度</param> public void bindDropChildItem(DropDownList drop, DataTable dt, string id, int length) { DataRow[] rows = dt.Select("ParentID='" + id + "'", " orderby ASC");//取出id子节点进行绑定 for (int i = 0; i < rows.Length; i++) { this.Areaddl.Items.Add(new ListItem(SpaceLength(length) + rows[i]["Name"].ToString(), rows[i]["ID"].ToString())); this.bindDropChildItem(drop, dt, rows[i]["ID"].ToString(), length + 1);//空白数目加1 } } /// <summary> /// 子节点前面的空白数 /// </summary> /// <param name="i"></param> /// <returns></returns> protected string SpaceLength(int i) { string space = ""; for (int j = 0; j < i; j++) { space += " ";//注意这里的空白是智能abc输入法状态下的v11字符; } return space; } #endregion