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 ;/

Answer 1

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