How do I recieve a JavaScript object as a webmethod parameter?

I create a custom JavaScript object on the client side attempted to send to a webmethod and I kinda got it - but do not know how to get the date. The test method looks like this:

[WebMethod]
public string TestMethod(Object obj)
{
return "test";
}

So how can cast this in to the right object to access the data? I can see the contents if I watch it but don't know how to cast it to an object I can use it

Assuming your javascript object is something like the following

{index:-1,fileId:-1,fileExt:\"xls\",issueDate:\"1 Jan 2007\"}

you can create a structure in your serverside code to handle it

Public Structure Doc
Public index As Integer
Public fileId As Long
Public fileExt As String
Public issueDate As Date
End Structure

<WebMethod()> _
Public Function SaveDocs(ByVal docs As Doc()) As Doc()

One more question - if you don't mind:

If my JSON contains an Array - Can you tell how to make that happen? :

My BO:

 [Serializable]public class Supplier : Base {public string Name {get;set; }public string Phone {get;set; }public string Fax {get;set; }public string Website {get;set; }public string Status {get;set; }public Site Site {get;set; }public DateTime Since {get;set; }public Array Contacts {get;set; }public Supplier() {this.Site=new Site();this.Contacts =new Member[0]; } }

Member is also another Object.

My JSON looks something like:

Supplier = {"ID":-1,"Name":"","Phone":"","Website":"","Site":{"Address1":"","Address2":"","City":"","State":{"Name":"","Abbreviation":"","ID":-1},"ZipCode":""},"Contacts":[]};

Its the Contacts that is tripping me up.

Asp.net ajax does the trick for us, I mean the serialization/deserialization.

But for some reason it not filling all the objects - I check the JS object prior to calling the webmethod and the fields are populated but when it casted in the server object - some properties are not filled. Also, my other question is how to pass the array object that is a property of the JS object.

My mistake - I was expecting to receive the parent object and passing the child.

How do I bind an event to a custom Javascript function?

So I'm tyring to do this in xml-script if possible. What I'm looking for is how to fire a javascript function I define, but declare it in the <completed></completed> tags of my <webMethod>. I did it in a roundabout way by binding it to an html control and applying a custom transform to that html control, but that feels like cheating. Any advice? Ideally it'd look something like:

<completed>

<invokeMethod target="MyJSFunction" method="invoke">

<bindings>

<binding id="something" dataContext="myWebMethod" datapath="result" property="parameters" propertyKey="inputVariable" />

</bindings>

</invokeMethod>

</completed>

But of course that's not quite right as I tried it and it didn't work...

Ok, I managed to solve this, but I'd like to know if there's a way to solve it w/o resorting to what I did. First, I just used the completed attribute of the <pageMethod> (see my .js extension athttp://forums.asp.net/thread/1342638.aspx at this point in the discussion, though, assume it's a serviceMethod, as the functionality is the same). So, my xml-script worked in this fashion:

<pageMethod method="MyMethodName" id="MyMethodId" completed="CustomJavascriptFunction">

<bindings>

<binding to input stuff />

</bindings>

</pageMethod>

That all worked, except that the eventArgs object being passed back as part of the 'completed' event was a Sys.EventArgs.Empty object, which I figured out after iterating over the properties and then digging into the .js again. For my solution, since I was using my custom 'Com.VelocityDataSolutions.PageMethodRequest' class anyway, I just changed the onMethodComplete function to pass the result variable to the target function. to do that I changed:

target.completed.invoke(target,Sys.EventArgs.Empty);

to

target.completed.invoke(target,result);

It works like I want now, my event handler grabs teh eventArgs object to use for its processing. I might change it to pass a more complex object (e.g. passing all the variables instead of just the result), but for now it works.

My real question, though, is did I have to go through all this? lol... If I wanted to do the same thing w/ a serviceMethod and didn't wantt o mod the atlas.js or subclass or anything, is there a way to pass the web service's output string to the event handler in declarative markup?

How can I get more size back from my WS? - System.InvalidOperationException -- Maximum len

I'm working on this webservice. I can easily getting my databack (an array of my custom object) but i'm now trying to return an array of 1,000 results to 5,000 results but I keep getting the error:

The Server method 'getPlaybackInformation' failed with the following error:
System.InvalidOperationException -- Maximum length exceeded.

I tried putting this in my web.config:
<system.web.extensions>
<scripting>
<webServices>
<jsonSerialization maxJsonLength="500000">
</jsonSerialization>
</webServices>
</scripting>
</system.web.extensions>

but that got me no where.

Any Thoughts?

I came across the same problem, my web service returned a string that exceeded the limit

I applied the maxJsonLength that you attempted, into my web.config, and that fixed my problem completely...

I don't believe that changing the max JSON serialization length will do anything for you. That is how much data can be serialized at one into JSON, but you aren't returning JSON, you are returning an array of objects. What you need to do is turn up the max allowable data that can be transferred in the application. In the web.config add:

<configuration>
<system.web>
<httpRuntime maxRequestLength="500000" />
</system.web>
</configuration>

Note that the size is in kilobytes.

http://msdn2.microsoft.com/en-us/library/e1f13641(vs.71).aspx