在用户控制下注册或使用 web 服务，而不是母版页

Question

Just trying to see if I can add a definition/register AJAX web service explicitly in a user control that uses it (via client side). Web service is defined and located on the same server as the control(s) that use it, but the control is unable to use it.

It works when I'm adding reference to the web service on SriptManager on the master page, but I want to specifically add it to be used by custom control, and then wan't to remove it from the master page.

Scenario: I've tried: <%@ Register TagPrefix="ajaxws" Assembly="AssemblyName" Namespace="WebService.AjaxNameSpace" %>

Let me know if some more details are needed. I've been researching a fix for this, but the only reliable fix I found, is to add the.asmx to ScriptManager on a master page.

Answer 1

It would seem you are trying to add a script reference or a service reference to your script manager.

You can accomplish this in the code-behind of your user control, using a statement such as:

ScriptManager.GetCurrent(this.Page).Scripts.Add(/* Whatever it is you want to add */);

... for which you need the Script Reference class, or...

ScriptManager.GetCurrent(this.Page).Services.Add(/* Whatever it is you want to add */);

... for which you need the Service Reference class.

Note that either approach will give you fits if the page doesn't have a script manager.

Answer 2

If you are able to use jquery in your solution and you want to work the reference completely from the client side. You can do this:

<script type="text/javascript">
    function CallService() {
        $.ajax({
            type: "POST", //You can use POST or GET (GET works a little different)
            url: "YourWebService.asmx/GetSomeData", //This assumes a relative path, you can use any url.
            data: "{}",
            contentType: "application/json; charset=utf-8", // you must define the content type (though I am not sure what other options are of any value here...)
            dataType: "json", //you can do json or XML serialization, do json, it is easier in the long run.
            success: Success, //this is a reference to the "function Success" to be invoke by the the service return.
            error: Error //ditto for the function Error...
        });
    }

    function Success(data, status) {
        //do what you want with the data...
    }

    function Error(request, status, error) {
        //something in the soup ain't right...
    }
</script>

This is really about as easy as it gets for invoking a web service using ajax and jQuery.