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Ringkasan contoh mencapai kemahiran linkage_javascript bukan muat semula

WBOY
WBOYasal
2016-05-16 15:58:141148semak imbas

Iframe tidak mencapai pautan muat semula

Tiada muat semula iframe sebenarnya ialah muat semula separa Bar tatal bar status masih akan menatal, tetapi halaman tidak akan berkelip Ini adalah teknologi lama, dan ia akan menjadi lebih perlahan apabila data yang diproses adalah besar . Dalam contoh ini, dua halaman diperlukan: index.aspx dan frame.asapx Index.aspx digunakan untuk memaparkan antara muka Terdapat teg iframe yang menunjuk ke halaman frame.aspx untuk memaparkan hasil
kod hujung hadapan index.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Index.aspx.cs" Inherits="_Default" %>

<!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 id="Head1" runat="server">
  <title>无标题页</title>

  <script type="text/javascript">
    function Query() {
      var ddlpro = document.getElementById('ddlPro');
      var pro = ddlpro.options[ddlpro.selectedIndex].innerText;
      if (pro != "") {
        document.getElementById("iframe1").src = "frame.aspx&#63;Pro=" + pro;
      }
    }

  </script>

</head>
<body>
  <form id="form2" runat="server">
  <div>
    <table border="1" cellpadding="3" cellspacing="0" width="600px">
      <tr>
        <td colspan="2" align="center">
          Iframe实现局部刷新
        </td>
      </tr>
      <tr>
        <td>
          省份名称:
        </td>
        <td>
          <select id="ddlPro" style="width: 201px">
            <option value="湖北">湖北</option>
            <option value="河北">河北</option>
            <option value="广东">广东</option>
            <option value="河南">河南</option>
          </select>
          <input id="Button3" type="button" value="查询" onclick="Query()" />
        </td>
      </tr>
      <tr>
        <td>
          显示城市列表
        </td>
        <td>
          <iframe src="frame.aspx" style="text-align: center" id="iframe1" width="100%"
            height="100%" frameborder="0" scrolling="no" />
        </td>
      </tr>
    </table>
  </div>
  </form>
</body>
</html>

Kod bahagian hadapan frame.aspx: 

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="frame.aspx.cs" Inherits="myframe" %>

<!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 id="Head1" runat="server">
  <title>无标题页</title>
</head>
<body>
  <form id="form2" runat="server">
  <div>
    <asp:DropDownList ID="ddlCity" runat="server" Width="179px">
    </asp:DropDownList>
  </div>
  </form>
</body>
</html>

kod latar belakang frame.aspx: 

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 tiada pautan muat semula

Kod halaman hadapan: 

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="index.aspx.cs" Inherits="jacascript_Default" %>

<!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 id="Head1" runat="server">
  <title>无标题页</title>

  <script type="text/javascript">
    function FillData(strcity) {

      document.getElementById("ddlCity").options.length = 0;
      var indexofcity;
      var city;
      while (strcity.length > 0) {
        indexofcity = strcity.indexOf(",");
        if (indexofcity > 0) {
          city = strcity.substring(0, indexofcity);

          strcity = strcity.substring(indexofcity + 1);
          document.getElementById("ddlCity").add(new Option(city, city));
        }
        else {
          document.getElementById("ddlCity").add(new Option(strcity, strcity));
          break;
        }

      }
    }
  </script>

</head>
<body>
  <form id="form2" runat="server">
  <div>
    <table width="700px" border="1" cellpadding="5" cellspacing="0">
      <tr>
        <td colspan="2" align="center">
          脚本方法实现刷新
        </td>
      </tr>
      <tr>
        <td>
          选择省份:
        </td>
        <td>
          <select id="ddlPro" style="width: 201px">
            <option value="湖北">湖北</option>
            <option value="河北">河北</option>
            <option value="广东">广东</option>
            <option value="河南">河南</option>
          </select>
          <input id="btnQuery" type="button" value=" 查询" onclick="City()" />
        </td>
      </tr>
      <tr>
        <td>
          城市:
        </td>
        <td>
          <asp:DropDownList ID="ddlCity" runat="server" Width="201px">
          </asp:DropDownList>
        </td>
      </tr>
    </table>
  </div>
  </form>
</body>
</html>

Kod belakang: 

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;
  }
}


Panggil Balik tiada pautan muat semula

Kod bahagian hadapan: 

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="index.aspx.cs" Inherits="callback_Default" %>

<!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 id="Head1" runat="server">
  <title>无标题页</title>

  <script type="text/javascript">
 function FillData()
 {
 var ddlpro=document.getElementById('ddlPro');
 var pro=ddlpro.options[ddlpro.selectedIndex].value;
 <% =ClientScript.GetCallbackEventReference(this,"pro","FillDll",null) %>
  }

 function FillDll(strcity)
 {
    document.getElementById("ddlCity").options.length=0;
 var indexofcity;
 var city;
 while(strcity.length>0)
 {
      indexofcity=strcity.indexOf(",");
 if(indexofcity>0)
 {
        city=strcity.substring(0,indexofcity);

        strcity=strcity.substring(indexofcity+1);
        document.getElementById("ddlCity").add(new Option(city,city));
      }
 else
 {
        document.getElementById("ddlCity").add(new Option(strcity,strcity));
 break;
      }

    }
  }
  </script>

</head>
<body>
  <form id="form2" runat="server">
  <div>
    <table width="700px" border="1" cellpadding="5" cellspacing="0">
      <tr>
        <td colspan="2" align="center">
          callback方法实现刷新
        </td>
      </tr>
      <tr>
        <td>
          选择省份:
        </td>
        <td>
          <select id="ddlPro" style="width: 200px">
            <option value="湖北">湖北</option>
            <option value="河北">河北</option>
            <option value="广东">广东</option>
            <option value="河南">河南</option>
          </select>
          <input id="btnQuery" type="button" value=" 查询" onclick="FillData()" />
        </td>
      </tr>
      <tr>
        <td>
          城市:
        </td>
        <td>
          <asp:DropDownList ID="ddlCity" runat="server" Width="201px">
          </asp:DropDownList>
        </td>
      </tr>
    </table>
  </div>
  </form>
</body>
</html>

Kod belakang: 

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 tiada pautan muat semula

Contoh ini juga menggunakan dua halaman: oec203index.aspx dan datapage.aspx digunakan terutamanya untuk menghantar semula data yang akan dipaparkan
Kod muka hadapan halaman .aspx: 

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="index.aspx.cs" Inherits="ajax_Default" %>

<!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 id="Head1" runat="server">
  <title>无标题页</title>

  <script type="text/javascript">
    var xmlhttp;
    function getData() {
      var ddlpro = document.getElementById("ddlPro");
      var pro = ddlpro.options[ddlpro.selectedIndex].innerText;
      xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
      xmlhttp.onreadystatechange = statechange;
      xmlhttp.Open("GET", "datapage.aspx&#63;pro=" + pro, true);
      xmlhttp.Send();
    }

    function statechange() {
      if (xmlhttp.readystate == 4) {
        if (xmlhttp.status == 200) {
          FillData(xmlhttp.responseText);
        }
      }
    }
    function FillData(strcity) {
      document.getElementById("ddlCity").options.length = 0;
      var indexofcity;
      var city;
      while (strcity.length > 0) {
        indexofcity = strcity.indexOf(",");
        if (indexofcity > 0) {
          city = strcity.substring(0, indexofcity);
          strcity = strcity.substring(indexofcity + 1);
          document.getElementById("ddlCity").add(new Option(city, city));
        }
        else {
          document.getElementById("ddlCity").add(new Option(strcity, strcity));
          break;
        }
      }
    }
  </script>

</head>
<body>
  <form id="form2" runat="server">
  <div>
    <table width="700px" border="1" cellpadding="5" cellspacing="0">
      <tr>
        <td colspan="2" align="center">
          ajax方法实现刷新
        </td>
      </tr>
      <tr>
        <td>
          选择省份:
        </td>
        <td>
          <select id="ddlPro" style="width: 201px">
            <option value="湖北">湖北</option>
            <option value="河北">河北</option>
            <option value="广东">广东</option>
            <option value="河南">河南</option>
          </select>
          <input id="btnQuery" type="button" value=" 查询" onclick="getData()" />
        </td>
      </tr>
      <tr>
        <td>
          城市:
        </td>
        <td>
          <asp:DropDownList ID="ddlCity" runat="server" Width="201px">
          </asp:DropDownList>
        </td>
      </tr>
    </table>
  </div>
  </form>
</body>
</html>

datapage.aspx kod latar belakang: 

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;
    }
  }
}

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