如何从javascript调用Web服务 [英] How to call a web service from javascript

问题描述

我正在尝试从javascript调用我的.asmx webservice，但是成功函数没有执行

这里是我的javascript

I'm trying to call my .asmx webservice from javascript but the success function is not executing
here is my javascript

<script type="text/javascript" >
      function getResult()
      {
          var info = document.getElementById("InputText").value;
          HTML5.BusTracking.GetBySpot(info,SucceededCallback);
          alert(info);
      }
      function SucceededCallback(result)
      {
          alert("yes");
          document.getElementById("ResultText").html = result["Latitude"];
      }
      function FailedCallback()
      {
          alert(error.message());
      }
  </script>

i在我的网络服务上设置了一个断点，我的网络服务返回的数据很好

这里是我的webservice

i put a break point on my web service and my web service returns the data good
here is my webservice

[System.Web.Script.Services.ScriptService]
public class BusTracking : System.Web.Services.WebService
{

    [WebMethod]
    [ScriptMethod(ResponseFormat = ResponseFormat.Json)]
    public DataTable GetBySpot(string spot)
    {
        string conn = "Data Source=svhqdev01;Initial Catalog=Bustracking;Persist Security Info=True;User ID=bustrack;Password=abcd1234;MultipleActiveResultSets=True;Application Name=EntityFramework";
        DataTable table = new DataTable();
        table.TableName = "Result";

        using(SqlConnection connection=new SqlConnection(conn))
        {
            SqlCommand cmd = new SqlCommand("GetByspot",connection);
            cmd.CommandType = CommandType.StoredProcedure;
            SqlParameter parameter = new SqlParameter("@spot", spot);
            cmd.Parameters.Add(parameter);
            connection.Open();
            SqlDataAdapter adapter=new SqlDataAdapter(cmd);
            SqlDataReader reader = cmd.ExecuteReader();
            table.Load(reader);
            return table;
        }
    }
}

推荐答案

请参阅以下链接



致电在常规时间间隔内使用JavaScript的ASP.NET Web服务 [ ^ ]

http://pavanarya.wordpress.com/2012/05/20/calling-a-web-service-from-javascript-using-xmlhttprequest/ [ ^ ]



谢谢，

-RG

See the below links

Calling ASP.NET Webservice using JavaScript on Regular Interval of Time[^]
http://pavanarya.wordpress.com/2012/05/20/calling-a-web-service-from-javascript-using-xmlhttprequest/[^]

Thank You,
-RG

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