web service中的方法返回类型可以是void 吗？解决方案

web service中的方法返回类型可以是void 吗？
可以吗可以吗？
------解决方案--------------------
测试了一下，是完全可以的

[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

{


    [WebMethod]

    public string HelloWorld(ref string hi)

    {

        hi = " I'm " + hi;

        return "Hello World. " + hi;

    }


    [WebMethod]

    public void HelloWorldVoidRef(ref string hi)

    {

        hi = "Void I'm " + hi;

    }


    [WebMethod]

    public void HelloWorldVoid()

    {

        // do something

    }

}

客户端使用添加服务引用的方式生成代理类，使用同步方法

[System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Advanced)]

WpfApplication15.ServiceReference1.HelloWorldResponse WpfApplication15.ServiceReference1.WebService1Soap.HelloWorld(WpfApplication15.ServiceReference1.HelloWorldRequest request) {

    return base.Channel.HelloWorld(request);

}

        

public string HelloWorld(ref string hi) {

    WpfApplication15.ServiceReference1.HelloWorldRequest inValue = new WpfApplication15.ServiceReference1.HelloWorldRequest();

    inValue.Body = new WpfApplication15.ServiceReference1.HelloWorldRequestBody();

    inValue.Body.hi = hi;

    WpfApplication15.ServiceReference1.HelloWorldResponse retVal = ((WpfApplication15.ServiceReference1.WebService1Soap)(this)).HelloWorld(inValue);

    hi = retVal.Body.hi;

    return retVal.Body.HelloWorldResult;

}

        

[System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Advanced)]

WpfApplication15.ServiceReference1.HelloWorldVoidRefResponse WpfApplication15.ServiceReference1.WebService1Soap.HelloWorldVoidRef(WpfApplication15.ServiceReference1.HelloWorldVoidRefRequest request) {

    return base.Channel.HelloWorldVoidRef(request);

}

        

public void HelloWorldVoidRef(ref string hi) {

    WpfApplication15.ServiceReference1.HelloWorldVoidRefRequest inValue = new WpfApplication15.ServiceReference1.HelloWorldVoidRefRequest();

    inValue.Body = new WpfApplication15.ServiceReference1.HelloWorldVoidRefRequestBody();

    inValue.Body.hi = hi;

    WpfApplication15.ServiceReference1.HelloWorldVoidRefResponse retVal = ((WpfApplication15.ServiceReference1.WebService1Soap)(this)).HelloWorldVoidRef(inValue);

    hi = retVal.Body.hi;