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How to use js to call WebService across domains

php中世界最好的语言Original: 2018-04-03 14:52:501759browse

This time I will bring you how to use js to call WebService across domains. What are the precautions for calling WebService across js? . The following is a practical case, let's take a look.

Step 1. Add

<!--此节点可允许脚本跨域调用webservice-->
  <webServices>
   <protocols>
    <add name="HttpPost"/>
    <add name="HttpGet"/>
   </protocols>
  </webServices>
  <!--此节点可允许脚本跨域调用webservice-->

to the system.web node in web.config Step 2. webservice code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Web.Mvc;
namespace WebService
{
  /// <summary>
  /// WebService1 的摘要说明
  /// </summary>
  [WebService(Namespace = "http://tempuri.org/")]
  [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
  [System.ComponentModel.ToolboxItem(false)]
  // 若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务，请取消对下行的注释。
  [System.Web.Script.Services.ScriptService]
  public class WebService1 : System.Web.Services.WebService
  {
    [ValidateInput(false)]
    [WebMethod(Description = "测试")]
    public void getDBTableInfos(string EnterpriseCode)
    {
      HttpContext.Current.Response.ContentType = "application/json;charset=utf-8";
      string jsonCallBackFunName = string.Empty;
      jsonCallBackFunName = HttpContext.Current.Request.Params["jsoncallback"].ToString();
      HttpContext.Current.Response.Write(jsonCallBackFunName + "({ \"Result\": \"" + EnterpriseCode + "\" })");
    } 
  }
}

Step 3. html page part

<!DOCTYPE html>
<html>
<head>
  <title>Index</title>
  <script src="http://www.cnblogs.com/Scripts/jquery-1.5.1.js" type="text/javascript"></script>
  <script type="text/javascript">
    $(function () {
      $("#btnSubmit").click(function () {
        var EnterpriseCode = "39"; //企业代码        
        var dataStr = "EnterpriseCode=" + EnterpriseCode;
        $.ajax({
          type: "get",
          url: "http://xxx/xxx.asmx/AntiWebQuery_Ajax?jsoncallback?",
          dataType: "jsonp",
          jsonp: 'jsoncallback',
          data: dataStr,
          success: function (result) {
            //返回结果
            alert(result.Result);
          }
        });
      });
    });
  </script>
</head>
<body>
  <p>
    <input id="btnSubmit" type="button" value="查询" />
  </p>
</body>
</html>

I believe you have mastered the method after reading the case in this article. For more exciting content, please pay attention to other related articles on the php Chinese website!

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