欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  web前端

实现无刷新联动例子汇总_javascript技巧

程序员文章站 2022-04-26 11:50:25
...
Iframe实现无刷新联动

iframe的无刷新其实是局部刷新,状态栏的滚动条还是会滚动,只是页面不会闪烁,这是一种比较老的技术了,在处理的数据两大的时候会比较慢,在本例中需要两个页面:index.aspx和frame.asapx,index.aspx用来显示界面,其中有一个iframe标记,指向frame.aspx页用来显示结果
index.aspx前台代码





无标题页
Iframe实现局部刷新
省份名称:
显示城市列表

frame.aspx的前台代码:





无标题页

frame.aspx后台代码:

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class myframe : System.Web.UI.Page
{
  protected void Page_Load(object sender, EventArgs e)
  {
    string pro = Request.QueryString["pro"];
    switch (pro)
    {
      case "湖北":
        this.ddlCity.Items.Clear();
        this.ddlCity.Items.Add("武汉");
        this.ddlCity.Items.Add("黄冈");
        this.ddlCity.Items.Add("黄石");
        this.ddlCity.Items.Add("襄樊");
        break;
      case "河北":
        this.ddlCity.Items.Clear();
        this.ddlCity.Items.Add("石家庄");
        this.ddlCity.Items.Add("唐山");
        this.ddlCity.Items.Add("承德");
        this.ddlCity.Items.Add("邯郸");
        break;
      case "广东":
        this.ddlCity.Items.Clear();
        this.ddlCity.Items.Add("广州");
        this.ddlCity.Items.Add("佛山");
        this.ddlCity.Items.Add("深圳");
        this.ddlCity.Items.Add("珠海");
        break;
      case "河南":
        this.ddlCity.Items.Clear();
        this.ddlCity.Items.Add("郑州");
        this.ddlCity.Items.Add("新乡");
        this.ddlCity.Items.Add("安阳");
        this.ddlCity.Items.Add("信阳");
        break;

    }
  }
}

JavaScript无刷新联动

前台页面代码:





无标题页
脚本方法实现刷新
选择省份:
城市:

后台代码:

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Text;

public partial class jacascript_Default : System.Web.UI.Page
{
  protected void Page_Load(object sender, EventArgs e)
  {
    StringBuilder myscript = new StringBuilder();
    myscript.Append("function City() {\n");
    myscript.Append("var ddlpro=document.getElementById('ddlPro');\n");
    myscript.Append("var pro=ddlpro.options[ddlpro.selectedIndex].innerText;\n");
    //myscript.Append("var pro=document.getElementById('txtPro').value;\n");
    myscript.Append("switch(pro) { \n");
    myscript.Append("case '湖北':\n");
    myscript.Append("FillData('" + GetCityStr("湖北") + "');\n");
    myscript.Append("break;\n");
    myscript.Append("case '河北':\n");
    myscript.Append("FillData('" + GetCityStr("河北") + "');\n");
    myscript.Append("break;\n");
    myscript.Append("case '广东':\n");
    myscript.Append("FillData('" + GetCityStr("广东") + "');\n");
    myscript.Append("break;\n");
    myscript.Append("case '河南':\n");
    myscript.Append("FillData('" + GetCityStr("河南") + "');\n");
    myscript.Append("break;}\n");
    myscript.Append("}\n");

    Page.ClientScript.RegisterClientScriptBlock(typeof(string), "city", myscript.ToString(), true);

  }

  private string GetCityStr(string pro)
  {
    string city = "";
    switch (pro)
    {
      case "湖北":
        city = "武汉,黄冈,黄石,襄樊";
        break;
      case "河北":
        city = "石家庄,唐山,承德,邯郸";
        break;
      case "广东":
        city = "广州,佛山,深圳,珠海";
        break;
      case "河南":
        city = "郑州,新乡,安阳,信阳";
        break;
    }
    return city;
  }
}


CallBack无刷新联动

前台代码:





无标题页
callback方法实现刷新
选择省份:
城市:

后台代码:

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class callback_Default : System.Web.UI.Page,ICallbackEventHandler
{
 private string _data;
 protected void Page_Load(object sender, EventArgs e)
 {

  }

 ICallbackEventHandler 成员
}

Ajax无刷新联动

该例子也要用到两个页面:oec203index.aspx和datapage.aspx. datapage.aspx主要用来回送要显示的数据
.aspx页面前台代码:





无标题页
ajax方法实现刷新
选择省份:
城市:

datapage.aspx后台代码:

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class ajax_datapage : System.Web.UI.Page
{
  protected void Page_Load(object sender, EventArgs e)
  {
    string pro = Request.QueryString["pro"];
    Response.Clear();
    switch (pro)
    {
      case "湖北":
        Response.Write("武汉,黄冈,黄石,襄樊");
        break;
      case "河北":
        Response.Write("石家庄,唐山,承德,邯郸");
        break;
      case "广东":
        Response.Write("广州,佛山,深圳,珠海");
        break;
      case "河南":
        Response.Write("郑州,新乡,安阳,信阳");
        break;
    }
  }
}

以上所述就是本文的全部内容了,希望大家能够喜欢。

相关标签: 无刷新联动