jquery用ajax方式从后台获取json数据后如何将内容填充到下拉列表

发布时间：2020-12-15 23:31:12 所属栏目：百科来源：网络整理

导读：对于问题从后台获取json数据，将内容填充到下拉列表，代码非常简单，具体过程请看下面代码。需求： url:链接 par：ID sel：下拉列表选择器 = 0; i--) { $(sel).prepend(' ') }; $(sel).prepend(' ') });} 以上代码很简单吧，此问题很easy的解决了。 Jquery

对于问题从后台获取json数据，将内容填充到下拉列表，代码非常简单，具体过程请看下面代码。

需求：

url:链接 par：ID sel：下拉列表选择器

= 0; i--) { $(sel).prepend('

以上代码很简单吧，此问题很easy的解决了。

Jquery 使用Ajax获取后台返回的Json数据页面处理过程

具体实现过程请看下面代码示例：

<%@ WebHandler Language="C#" Class="jsondata" %>
using System;
using System.Web;
using System.Web.Script.Serialization;
using System.IO;
using System.Text;
using System.Collections.Generic;
using Newtonsoft.Json;
using System.Data;
public class jsondata : IHttpHandler {
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/plain";
string JsonStr = JsonConvert.SerializeObject(CreateDT());
context.Response.Write(JsonStr);
context.Response.End();
}

region 创建测试数据源

//创建DataTable
protected DataTable CreateDT()
{
DataTable tblDatas = new DataTable("Datas");
//序号列
//tblDatas.Columns.Add("ID",Type.GetType("System.Int32"));
//tblDatas.Columns[0].AutoIncrement = true;
//tblDatas.Columns[0].AutoIncrementSeed = 1;
//tblDatas.Columns[0].AutoIncrementStep = 1;
//数据列
tblDatas.Columns.Add("IdNumber",Type.GetType("System.String"));
tblDatas.Columns.Add("Name",Type.GetType("System.String"));
tblDatas.Columns.Add("BirthDate",Type.GetType("System.String"));
tblDatas.Columns.Add("Sex",Type.GetType("System.String"));
tblDatas.Columns.Add("Wage",Type.GetType("System.Decimal"));
tblDatas.Columns.Add("Bonus",Type.GetType("System.Decimal"));
//统计列开始
tblDatas.Columns.Add("NeedPay",Type.GetType("System.String"),"Wage+Bonus");
//统计列结束
tblDatas.Columns.Add("Address",Type.GetType("System.String"));
tblDatas.Columns.Add("PostCode",Type.GetType("System.String"));
//设置身份证号码为主键
tblDatas.PrimaryKey = new DataColumn[] { tblDatas.Columns["IdNumber"] };
tblDatas.Rows.Add(new object[] { "43100000000000","张三","1982","0",3000,1000,null,"深圳市","518000" });
tblDatas.Rows.Add(new object[] { "43100000000001","李四","1983","1",3500,1200,"518000" });
tblDatas.Rows.Add(new object[] { "43100000000002","王五","1984",4000,1300,"518000" });
tblDatas.Rows.Add(new object[] { "43100000000003","赵六","1985",5000,1400,"518000" });
tblDatas.Rows.Add(new object[] { "43100000000004","牛七","1986",6000,1500,"518000" });
return tblDatas;
}

endregion

public bool IsReusable
{
get
{
return false;
}
}
}

<%@ WebHandler Language="C#" Class="jsondata" %>
using System;
using System.Web;
using System.Web.Script.Serialization;
using System.IO;
using System.Text;
using System.Collections;
using System.Collections.Generic;
using System.Data;
public class jsondata : IHttpHandler {
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/plain";
context.Response.Cache.SetNoStore();
string data = "[{"key":"1","info":{"name":"222","age":"333","sex":"444"}},{"key":"2","info":{"name":"999","age":"000","sex":"111"}}]";
context.Response.Write(new JavaScriptSerializer().Serialize(data));
}
public bool IsReusable
{
get
{
return false;
}
}
}

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Test2013.aspx.cs" Inherits="Test2013" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">

<%@ WebHandler Language="C#" Class="GetPara" %>
using System;
using System.Web;
using System.Data;
using System.Collections.Generic;
using System.Web.Script.Serialization;
public class GetPara : IHttpHandler {
public void ProcessRequest (HttpContext context) {
context.Response.ContentType = "text/plain";
string SortId = context.Request["sortid"];
string Type = context.Request["type"];
if (Type=="get")
{
if (!string.IsNullOrEmpty(SortId))
{
DataTable dt = MSCL.SqlHelper.GetDataTable("select * from PR_PRODUCTPARAS where sortid='" + SortId + "' ");
List list = new List();
for (int i = 0; i < dt.Rows.Count; i++)
{
Paras a = new Paras();
a.id = dt.Rows[i]["PARAID"].ToString();
a.name = dt.Rows[i]["PARANAME"].ToString();
list.Add(a);
}
context.Response.Write(new JavaScriptSerializer().Serialize(list));
}
}
else if (Type == "save")
{
//反序列化json
System.IO.Stream stream = context.Request.InputStream;
System.IO.StreamReader sr = new System.IO.StreamReader(stream,System.Text.Encoding.GetEncoding("UTF-8"));
string sJson = sr.ReadToEnd();
if (sJson.Contains("&"))
{
string[] sArr = sJson.Split('&');
for (int i = 0; i < sArr.Length; i++)
{
string[] sArr1 = sArr[i].Split('=');
object id = sArr1[0];
object value = sArr1[1];
}
}
}
else
{ }
}
public bool IsReusable {
get {
return false;
}
}
public struct Paras
{
public string id;
public string name;
}
}

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