JavaScriptSerializer to serialize a javascript function name

Question

I am using Flexigrid in my project to add a button on the grid toolbar I can use code like this:

...    
"buttons":[
    {"name":"Modifica","bclass":"edit","onpress":"doCommand"},
    {"name":"Elimina","bclass":"delete","onpress":"doCommand"}
],
...

Anyway the "onpress" attribute shall contain a reference to a js callback and so this field shall not be enclosed within quotation marks.

I am using the class JavaScriptSerializer (in the System.Web.Script.Serialization namespace) to do the serialization.

How I have to declare the variable to make JavaScriptSerializer serialize like this?

...    
"buttons":[
    {"name":"Modifica","bclass":"edit","onpress":doCommand},
    {"name":"Elimina","bclass":"delete","onpress":doCommand}
],
...

Thanks for helping!

Toni Rossmann · Accepted Answer · 2012-09-12 04:16:54Z

4

How about this trick ?

var param = new Dictionary<string,string>();

param["onpress"] = "%doCommand%";

return new JavaScriptSerializer().Serialize( param ).Replace( "\"%", "" ).Replace( "%\"", "" );

answered Sep 12, 2012 at 4:16

Toni Rossmann

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Comments

Josh Stodola · Accepted Answer · 2010-09-09 18:44:15Z

0

To the best of my knowledge, there is not a native way to do this with the .NET serializer, but you could execute the following code on the client-side to turn the onpress JSON string into a callback...

var buttons = []; // Your JSON array
for(var i = 0; i < buttons.length; i++) {
  var b = buttons[i];
  b.onpress = window[b.onpress];
}

edited Sep 9, 2010 at 18:44

answered Sep 9, 2010 at 17:55

Josh Stodola

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3 Comments

letronje Over a year ago

Is there a need for an eval there ? window[oldOnPress]() should work ?

Matthew Flaschen Over a year ago

You don't need the outer function either. Just b.onpress = window[b.onpress];

Lorenzo Over a year ago

Good! Anyway I did not take this approach because I wanted everything packed inside my HTML helper extension. So I have changed the code in the extension to do something very similar to your suggestion. Thanks!

Matthew Flaschen · Accepted Answer · 2010-09-09 17:44:17Z

0

JavaScriptSerializer is meant for serializing to JSON, and JSON can not represent functions; it also can't refer to previously defined variables. So I don't believe this is possible.

answered Sep 9, 2010 at 17:44

Matthew Flaschen

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2 Comments

Lorenzo Over a year ago

Well...you're right. But I have used to build a fluent interface for the grid declaration. There is no way to do this?

Matthew Flaschen Over a year ago

@Lorenzon, there may be a way to get the JavaScript output you want, but not with JavaScriptSerializer alone.

letronje · Accepted Answer · 2010-09-09 18:01:57Z

0

You can store the function name as a string

...    
"buttons":[
    {"name":"Modifica","bclass":"edit","onpress":"doCommand"},
    {"name":"Elimina","bclass":"delete","onpress":"doCommand"}
],
...

answered Sep 9, 2010 at 18:01

letronje

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1 Comment

Lorenzo Over a year ago

This is not correct. If you read my question, they're already stored as strings and this does not work because the plugin wants reference to function not function name... ;)

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