1、说明通过 asp.net，利用jQuery ，c#语言给 select控件动态加载数据。前端页面使用的是.aspx类型的HTML页面，后台使用MVC上的controller控制器
2、webconfig 设置连接字符串
<configuration>
<connectionStrings>
<add name="connectStr" connectionString="Data Source=192.168.1.105;Initial Catalog=TestDB;Persist Security Info=True;User ID=sa;pwd=sa;" providerName="System.Data.SqlClient" />
</connectionStrings>
</configuration>
3、获取连接字符串
public class DBHelper
{
/// <summary>
/// 获取数据库连接字符串
/// </summary>
/// <returns></returns>
public static string getConnStr()
{
return WebConfigurationManager.ConnectionStrings["connStr"].ToString();
}
}
4、用到的数据表
我这里的数据表是Oracle中的，大家也可以用sql数据库
CREATE TABLE "DMKJ_SYSINFO_TS"."T_USER"
( "ID" NUMBER(10,0),
"NAME" VARCHAR2(255 BYTE),
"DESCRIBE" VARCHAR2(255 BYTE)
}
5、前端页面代码
说明：需要自己引用jQuery的库文件
1 <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="xx.aspx.cs" Inherits="xx.LoginPage" %> 2 3 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 4 <html xmlns="http://www.w3.org/1999/xhtml"> 5 <head> 6 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 7 <title></title> 8 //在这里引入jQuery的库文件 9 10 </head> 11 <body> 12 <div > 13 14 15 <select id="tt01" style=" 150px; height: 40px;font-size:17px;line-height: 40px;padding-left: 60px;" > 16 </select> 17 </div> 18 <script type="text/javascript"> 19 $(function () { 20 GetUserList(); 21 22 }); 23 function GetUserList() { 24 $.post("Login/GetUser", function (data) { 25 var table = data; 26 $("#tt01").empty(); //首先清空select现在有的内容 27 $("#tt01").append("<option selected='selected' value=0>请选择用户..</option>"); 28 for (var i = 0; i < table.length; i++) { 29 var item = table[i]; 30 $("#tt01").append("<option value=" + item.id + ">" + item.text + "</option>"); 31 } 32 //返回的是json格式的数据 33 }, "json"); 34 } 35 36 </script> 37 </body> 38 </html>
6、后台代码
1 public JsonResult GetUser() 2 { 3 string sqlStr = "select * from HYMGS_SYSINFO_FJ.t_office"; 4 OleDbDataReader dr =myExecuteReader(sqlStr); 5 List<OfficeEntity> myList = new List<OfficeEntity>(); 6 while(dr.Read()) 7 { 8 OfficeEntity ob1 = new OfficeEntity() { 9 id = Convert.ToInt32(dr["PID"].ToString()), 10 text = dr["NAME"].ToString() 11 }; 12 myList.Add(ob1); 13 } 14 dr.Close(); 15 return Json(myList, JsonRequestBehavior.DenyGet); 16 } 17 18 public static OleDbDataReader myExecuteReader(string strSQL) 19 { 20 21 //获取连接字符串 22 string strConn=DBHelper.getConnStr(); 23 OleDbConnection oraCn=new OleDbConnection(strConn) ; 24 OleDbCommand OraCmd = new OleDbCommand(strSQL,oraCn); 25 try 26 { 27 oraCn.Open (); 28 OleDbDataReader OraDr=OraCmd.ExecuteReader (CommandBehavior.CloseConnection); 29 return OraDr; 30 } 31 32 catch(OleDbException e) 33 { 34 throw new Exception(e.Message); 35 } 36 finally 37 { 38 //OraCmd.Dispose(); 39 //oraCn.Close (); 40 } 41 }
7、实体类
public class UserEntity { public int id { get; set; } public string text { get; set; } }