unknown web method using ajax/jquery

Question

ERROR: unknown web method DoIt Parameter name: methodName

I'm trying to pass a date into a DB Query function backended by VB.NET but am having problems with the webside of things.

var dat = $("#Date").val(); //textbox with a date    

$.ajax({
                    type: "POST",
                    url: "file.aspx/DoIt",
                    cache: false,
                    contentType: "application/json; charset=utf-8",
                    data: {param:dat},
                    dataType: "json",
                    success: function (data, status) {
                        var response = $.parseJSON(data.d);
                        alert(response.message);
                        alert(status);
                    },
                    error: function (xmlRequest) {
                        alert(xmlRequest.status + ' \n\r ' + xmlRequest.statusText + '\n\r' + xmlRequest.responseText);
                    }
                });

The file.aspx.vb file:

(at the end of the file)

<System.Web.Services.WebMethod()> _
Public Function DoIt(ByVal param As String) As String
    UpdateDB(param) 'function is above
End Function

I'm just not entirely sure whats going wrong or what it means ;/

can you tell us more about where you see the error message and what exactly it says? — Kristian
– Kristian, Commented Apr 2, 2012 at 20:03
Really just a 500 error with "unknown web method DoIt Parameter name: methodName" — Amanada Smith
– Amanada Smith, Commented Apr 2, 2012 at 20:07
...and you are getting that error in the javascript ajax response? — Kristian
– Kristian, Commented Apr 2, 2012 at 20:13

Community · Accepted Answer · 2017-05-23 12:07:22Z

3

Check out this answer. You may need to declare the function as Shared

<System.Web.Services.WebMethod()> _
Public Shared Function DoIt(ByVal param As String) As String
    UpdateDB(param) 'function is above
End Function

edited May 23, 2017 at 12:07

CommunityBot

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answered Apr 2, 2012 at 20:30

Terry

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Community · Accepted Answer · 2017-05-23 12:15:11Z

2

Something that might be worth checking out is to ensure that your database is setup to receive a datetime datatype.

Also something to try in your web-service declaration:

<ScriptMethod(ResponseFormat:=ResponseFormat.Json)> _
<WebMethod()> _
Public Function DoIt(ByVal param As String) As String
    UpdateDB(param) 'function is above
End Function

Reference: webservice - unknown web method parameter name methodname

edited May 23, 2017 at 12:15

CommunityBot

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answered Apr 2, 2012 at 20:14

sacredfaith

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