Web 服务方法名称无效

Question

I get the following error "Web Service method name is not valid" when i try to call webmethod from javascript

System.InvalidOperationException: SaveBOAT Web Service method name is not valid. at System.Web.Services.Protocols.HttpServerProtocol.Initialize() at System.Web.Services.Protocols.ServerProtocol.SetContext(Type type, HttpContext context, HttpRequest request, HttpResponse response) at System.Web.Services.Protocols.ServerProtocolFactory.Create(Type type, HttpContext context, HttpRequest request, HttpResponse response, Boolean& abortProcessing)

HTML Code :

<asp:LinkButton runat="server" ID="lnkAddBoat" OnClientClick="javascript:AddMyBoat(); return false;"></asp:LinkButton>

JS Code :

function AddMyBoat() {
            var b = document.getElementById('HdnControlId').value;

            jQuery.ajax({
                type: "GET",
                url: "/AllService.asmx/SaveBOAT",
                data: { Pid: b },
                contentType: "application/text",
                dataType: "text",
                success: function(dd) {
                    alert('Success' + dd);
                },
                error: function(dd) {
                    alert('There is error' + dd.responseText);
                }
            });
}

C# Code (Web method in AllService.asmx file)

[WebMethod]
public static string SaveBOAT(int Pid)
{
    // My Code is here
    //I can put anythng here
    SessionManager.MemberID = Pid;
    return "";
}

I tried all solutions found on Stack Overflow and ASP.NET site.but none of them worked for me.

Answer 1

It was a silly mistake.

remove Static keyword from method declaration.

[WebMethod]
public string SaveBOAT(string Pid)
{        
     SessionManager.MemberID = Pid;
     return "";
}

Answer 2

在我的情况下，我复制了另一个 asmx 文件，但没有将类属性更改为 asmx 文件本身中新类的名称（右键单击 asmx 文件 -> 查看标记）

Answer 3

在我的情况下，错误是 Web 服务方法被声明为“私有”而不是“公共”

Answer 4

Try using this, I think datatype should be JSON

       jQuery.ajax({
            type: "POST",  // or GET
            url: "/AllService.asmx/SaveBOAT",
            data: { Pid: b },
            contentType: "application/json; charset=utf-8",
            dataType: "json"
            success: function(dd) {
                alert('Success' + dd);
            },
            error: function(dd) {
                alert('There is error' + dd.responseText);
            }
        });

And in C# Code change Pid to string

    [WebMethod]
     public static string SaveBOAT(string Pid)
     {        
      SessionManager.MemberID = Pid;
      return "";
     }

Answer 5

I too faced the similar issue. The solution includes checking everything related to ensuring all name, parameters are passed correctly as many have responded. Make sure that the web method name that we are calling in UI page is spelled correctly, the data, data types are correct and etc. In my case, I misspelled the web method name in my ajax call. It works fine once I found and corrected the name correctly.
For Ex: In .asmx class file, this is the method name "IsLeaseMentorExistWithTheSameName" but when I called from UI this is how I called:

var varURL = <%=Page.ResolveUrl("~/Main/BuildCriteria.asmx") %> + '/IsLeaseMentorExistWithSameName';  

Notice that the word "The" is missing. That was a mistake and I corrected and so it worked fine.

Answer 6

Did U add ServiceReference Class. Check this once. Based on your comment I can tell what to do

Answer 7

I had this issue because my soap method had a List<string> parameter. Couldn't figure out a way to make it work with the array parameter; so just converted the parameter to a & -delimited string (eg val1&val2&val3 ) and converted the parameter to an array in the service method.

Answer 8

As Sundar Rajan states, check the parameters are also correct. My instance of this error was because I had failed to pass any parameters (as a body in a POST request) and the asmx web method was expecting a named parameter, because of this the binding logic failed to match up the request to the method name, even though the name itself is actually correct.

[WebMethod]
        public object MyWebMethod(object parameter)

If there is no parameter in the body of the request then you will get this error.

Answer 9

In my case, one of the WebService receiving parameters was called aId . When I called it from javascript, I was sending the correct Id value, but the name of the sent variable was incorrectly called bId . So I just had to rename the WebService call, keep the correct value like before, and just change the variable name.