如何使用带参数的XML Web Services [英] How to consume XML Web Services with Parameters

问题描述

这是我第一次处理Web服务，并且在使用带参数的Web方法时遇到错误.以下是我的代码.

Its my first time to deal with Web Services and I am having errors on consuming Web Methods with parameters. Below is my code.

[WebMethod]
		public string HelloWorld()
		{
			System.Diagnostics.EventLog.WriteEntry("HELLO WORLD INVOKED", "Congratulations, you have just invoked Hello World method of your local Web Service");
			return "Hello World";
		}
		[WebMethod]
		public string PostMethod(string test)
		{
			System.Diagnostics.EventLog.WriteEntry("POST METHOD INVOKED", "Congratulations, you have just invoked Post Method of your local Web Service. Data - " + test.ToUpper());
			return test.ToUpper();
		}

我调用这些Web方法的方式是通过创建HTTP POST到http://localhost/Service1.asmx/HelloWorld和http://localhost/Service1.asmx/PostMethod

我能够成功调用HelloWorld方法(我可以通过查看事件日志来验证它)，但是在调用PostMethod时却总是得到Internal Server Error.，我还尝试了http://localhost/Service1.asmx/PostMethod?测试=值，但仍然没有运气.

我知道可以通过搜索Google来解决此问题，但是由于我是初学者，因此我对搜索的方向并不熟悉.我尽力了，但是没有运气.

感谢您的帮助.

[更新]
这就是我将数据发布到Web服务的方式

The way I am calling these web methods are by creating a HTTP POST to http://localhost/Service1.asmx/HelloWorld and http://localhost/Service1.asmx/PostMethod

I am able to invoke HelloWorld method successfully(I can verify it by looking at the Event Log) but when calling PostMethod I always get Internal Server Error. I also tried doing http://localhost/Service1.asmx/PostMethod?test=value but still no luck.

I know this can be solved by searching Google but since I am a beginner, I am not familiar on which direction to search. I tried though but no luck.

Appreciate your help.

[UPDATE]
This is how I post the data to the web service

XmlDocument _xml = new XmlDocument();
_xml.Load(filePath);

ServicePointManager.ServerCertificateValidationCallback = AcceptAllCertificatePolicy;
WebRequest _request = WebRequest.Create((WebServiceURL));
_request.Credentials = new NetworkCredential(UserName, Password);
_request.Method = "POST";
_request.ContentType = "text/xml";

XmlTextWriter xw = new XmlTextWriter(_request.GetRequestStream(), Encoding.UTF8);
_xml.WriteTo(xw);
xw.Close();
WebResponse response = _request.GetResponse();
response.Close();

推荐答案

看看这些文章.
Calling-webservice-with-parameters-在ASP.NET中 [从BizTalk Server 2004的业务流程中调用带有自定义参数的Web服务 [ http://aspalliance.com/979_Working_with_Web_Services_Using_ASPNET.all [

Take a look these articles.
Calling-webservice-with-parameters-in-ASP.NET[^]
Calling a Web Service with Custom Parameters from an Orchestration in BizTalk Server 2004[^]



http://aspalliance.com/979_Working_with_Web_Services_Using_ASPNET.all[^]

您可以通过ajax调用访问服务方法

You can access service method through ajax calling

//to allow call from script
[System.Web.Script.Services.ScriptService]
public class DummyService : System.Web.Services.WebService
{
   [WebMethod]
    public string DummyMethod(string id)
    {
        try
        {
              //TO DO: method implementation will goes here
              return id      
        }
        catch
        {
            return null;
        }
    }

   [WebMethod]
    public DummyModel DummyModelMethod(string id, string name)
    {
        try
        {
              //TO DO: method implementation will goes here
              return new DummyModel{Id=int.parse(id), Name=name};
        }
        catch
        {
            return null;
        }
    }
}
public class DummyModel 
{
   public int Id{set;get;}
   public int Name{set;get;}
}

Ajax呼叫助手

Ajax calling helper

function jqAjaxPost(webmethod, paramArray, successFn, errorFn) {   
    //Create list of parameters in the form : {"paramName1":"paramValue1","paramName2":"paramValue2"}      
    var paramList = '''';
    if (paramArray.length > 0) {
        for (var i = 0; i < paramArray.length; i += 2) {
            if (paramList.length > 0)
                paramList += '','';
            paramList += ''"'' + paramArray[i] + ''":"'' + paramArray[i + 1] + ''"'';
        }
    }
    paramList = ''{'' + paramList + ''}'';
    //Call the page method

.ajax({ type: "POST", url: webmethod, contentType: "application/json; charset=utf-8", data: paramList, dataType: "json", success: successFn, error: errorFn }); }

.ajax({ type: "POST", url: webmethod, contentType: "application/json; charset=utf-8", data: paramList, dataType: "json", success: successFn, error: errorFn }); }

我们可以通过以下方式调用服务方法

we can invoke the service method by following way

<script type="text/javascript">
jqAjaxPost("DummyService.asmx/DummyMethod",
                  ["id", "1"],
                  function (msg) {
                      if (msg.d == null) {
                          alert("service error.");                         
                          return;
                      }
                      //alert("sucsess");
                      alert(msg.d);
                  },
                    function () {
                        alert(''service method not found'');                       
                    });
jqAjaxPost("DummyService.asmx/DummyModelMethod",
                  ["id", "1", "name", "hoho"],
                  function (msg) {
                      if (msg.d == null) {
                          alert("service error.");                         
                          return;
                      }
                      //alert("sucsess");
                      alert(msg.d.Id);
                      alert(msg.d.Name);
                  },
                    function () {
                        alert(''service method not found'');                       
                    });
</script>

这篇关于如何使用带参数的XML Web Services的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！