[CLOSED] JSON conversion

[Lex]

Hi!

I have a gridpanel where I can add, delete and modify the records and then I have a button with an userParam where I get the changedData of the store.

Now I need a JSON object to easily navigate the JSON string passed from the .getChangedData() function.

I found the JSON.deserialize() function but it seems not work because it thrown a null reference exception.

Here the code:

ASPX

            <ext:Button ID="btnSavePro" runat="server" Text="Salva Profilo" AutoPostBack="false" Icon="disk">
                <AjaxEvents>
                    <Click OnEvent="Salva_Profilo">
                        <UserParams><ext:Parameter Name="ChangedData" Value="#{stProfili}.getChangedData()" Mode="Raw" /></UserParams>
                    </Click>
                </AjaxEvents>
            </ext:Button>

Code Behind

       Dim strJSON As String = e.UserParams("ChangedData")
       Dim jr As JsonReader = JSON.Deserialize(strJSON)

The strJSON object contains a string like this: ""Deleted":[{"ID_PROFILO":8,"NOME_PROFILO":"Carne"}],"Updated":[{"ID_PROFILO":18,"NOME_PROFILO":"panini"}],"Created":[{"ID_PROFILO":"","NOME_PROFILO":"insalata"}]"

but a NullReferenceException was thrown by the function deserialize:

        public static object Deserialize(string value)
        {
            return JavaScriptConvert.DeserializeObject(value); 'here the NullReferenceException
        }

It's a bug or there's something wrong in my code?

Thanks!
Ale

[Vladimir]

Hi Lex,

please see this post http://forums.ext.net/showthread.php...=1553-4-1.aspx

You should call 'save' function of GridPanel and then handle Store events (or if you using UpdateProxy then request will be send to url setted in UpdateProxy). In post described all cases

If you have questions after reading post then let me know

[geoffrey.mcgill]

Hi Ale,

I'm just wondering if you have you have your sample working now? If yes, maybe you could post an update with the solution or comment on what revision was required.*


I'd just like to mark this thread as [CLOSED], but only if you're satisfied that the problem has actually been solved.

[Lex]

Hi Geoff,

I'm sorry if I didn't answer at this post but I was full of work last week...

Thank's to Vlad for his answer but the problem doesn't concern the saving approach but the conversion from JSON string to an easily navigate .NET object like the JSONReader, regardless of the operation which generates the JSON.

Now I temporarily solved the problem, parsing the whole JSON string using split and substring's operations but this isn't a stylish solution! ;)

Cheers
Ale