LoadOnDemand not working on IIS7

[Andrew]

Hi,
I am using the LoadOnDemand feature of the RadComboBox. It has been working on the VS development server and IIS6 but is not working after migrating to IIS7 in Classic mode.

When I type into the combo box a Javascript alert pops up with the message "The server method "LoadDropDown" failed".

My combo box is created like this:

var combobox = new RadComboBox
                {
                    WebServiceSettings = { Path = "~/Services/MyWebService.asmx", Method = "LoadDropDown" },
                    EnableLoadOnDemand = true,
                    MarkFirstMatch = true,
                    AllowCustomText = true,
                    ShowDropDownOnTextboxClick = false,
                    ID = "rcb",
                    MaxLength = 255,
                    EnableEmbeddedSkins = false
                };

The application is running in a pool using the classic mode, not Integrated pipeline mode.
In IIS7, the handler mappings have *.asmx paths mapped to  the handler IsapiModule.
According to some stuff on the web this could be a permissions error but I have tried giving full permissions to Network Service and it does not work.

All other AJAX requests are working fine.

In the web.config I have:

<httpHandlers>
    <remove path="*.asmx" verb="*" />
    <add path="*.asmx" verb="*" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" validate="false" />
     etc...

My asmx file's code looks like this:

namespace MyWebsite.Services
{

[WebService]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[ToolboxItem(false)]
[ScriptService]
public class MyWebService : WebService
{

    [WebMethod]
    public RadComboBoxItemData[] LoadDropDown(object context)
    {
    var currentData = (IDictionary<string, object>)context;
        var currentText = (string)currentData["Text"];

        var result = new List<RadComboBoxItemData>();
        etc.
        etc.
        return result.ToArray();
     }
}

}

Hope you can help

[Atanas Korchev]

Hi Andrew,

Have you tried replacing the type of the context with RadComboBoxContext?

We have tested similar setups but without any issues. I suggest you open a support ticket and send us over a runnable subset of your project so we can troubleshoot locally. Thanks.

Regards,
Albert
the Telerik team

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[DheepaB]

Was this ever solved, I get the same error

<

 

telerik:RadComboBox ID="ddlMatter" runat="server"

 

 

Width="350" TabIndex="2" EnableLoadOnDemand="true" >

 

 

<WebServiceSettings Path="ClientMatter.asmx" Method="GetMatters" />

 

 

</telerik:RadComboBox>

 

[

WebService(Namespace = "http://tempuri.org/")]

 

[

WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]

 

 

// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.

 

 

 

 

[System.Web.Script.Services.

ScriptService]

 

 

public class ClientMatter : System.Web.Services.WebService

 

 

 

 

{

[

WebMethod]

 

 

public IEnumerable GetMatters(object context)

 

{

 

using (var ctx = new TaskDataContext())

 

{

 

var items = (from matter in ctx.Matters

 

 

where matter.ClientCode == "089999"

 

 

 

 

 

orderby matter.MatterCode

 

 

select new

 

 

 

 

{

MatterCode = matter.MatterCode,

MatterName = matter.MatterCode +

"-" + matter.MatterName

 

}).ToList();

 

return items;

 

}

}

[Joe]

nevermind.

[Michael]

I was having the same "The server method XYZ failed." error as the web service populating the ComboBox is called.

I tried debugging with FireBug and the server response for the .asmx file is 404 Object Not Found. The project was working fine on my local test environment, but it is not working on our productive web server environment.

The called URI is: http://www.xyz.at/admin/index_red/veranstaltungen/sa_veranstaltung_slideshows_service.asmx/GetSlideshows

We use ELMAH for error handling and I found the following error in the log file of ELMAH:

Source: System.Web.Services

Type: System.InvalidOperationException

Message: Request format is unrecognized for URL unexpectedly ending in '/GetSlideshows'.


I found this solution for the problem of accesing the web service: http://stackoverflow.com/questions/657313/request-format-is-unrecognized-for-url-unexpectedly-ending-in

After this the web service was still not working. The same error in FireBug: 404 but the response body has changed. The web service was blocked by our application firewall which was filtering the HTTP content-type application/json that is used while calling the web service.

HTH