function GetCityInfo1() { $("#ddlCITY1").empty(); //$("#ddlCOUNTY").empty(); var strId = $("#ddlPROVINCE1").attr("value"); $('#HiddenPro').val(strId); $.get("../ashx/GetCityInfo.ashx",{ProID:strId,date:new Date().getTime(),proType:"getCity"},function(result) { $("#ddlCITY1").append($("<option></option>").val("0").html("--请选择城市--")); var datas=eval(result); for(var j in datas) { $("#ddlCITY1").append($("<option></option>").val(datas[j].ccode).html(datas[j].cityname)); } //获取区的信息 //GetCountryInfo(); }); }
后台代码:
if (context.Request.QueryString["ProID"] != null && context.Request.QueryString["proType"] != null) { string pcode = Convert.ToString(context.Request.QueryString.GetValues("ProID")[0]); string strSQL = "select cityname,ccode from CD_CityInfo where pcode='" + pcode + "' "; //执行T-SQL语句 返回DataTable DataTable dt = Snell.SnCode.DataBase.SQLServerHelper.Query(strSQL).Tables[0]; StringBuilder sb = new StringBuilder(); sb.Append(CreateJsonParameters(dt)); //根据省份编号获取信息 获取信息 if (sb.Length > 0) { context.Response.ClearContent(); context.Response.ContentEncoding = System.Text.Encoding.UTF8; context.Response.Write(sb.ToString()); context.Response.End(); } } #region 根据Datatable的数据结构转换成json数据 public string CreateJsonParameters(DataTable dt) { System.Text.StringBuilder sb = new System.Text.StringBuilder(); if (dt != null && dt.Rows.Count > 0) { sb.Append("["); for (int i = 0; i < dt.Rows.Count; i++) { sb.Append("{"); for (int j = 0; j < dt.Columns.Count; j++) { //如果值不是最后一个则添加逗号分隔 if (j < dt.Columns.Count - 1) { sb.Append("\"" + dt.Columns[j].ColumnName.ToString() + "\":" + "\"" + dt.Rows[i][j].ToString() + "\","); } //如果值为最后个字符则不添加逗号 else if (j == dt.Columns.Count - 1) { sb.Append("\"" + dt.Columns[j].ColumnName.ToString() + "\":" + "\"" + dt.Rows[i][j].ToString() + "\""); } } //如果为最后一个值的话 则不添加逗号 if (i == dt.Rows.Count - 1) { sb.Append("}"); } else { sb.Append("},"); } } sb.Append("]"); return sb.ToString(); } else { return null; } } #endregion