Error Encountered During Serialization with ASP.Net AJAX and JavaScript

Question

Error Encountered During Serialization with ASP.Net AJAX and JavaScript

Encountered an error message stating "Out of Stack Space" while attempting to serialize an ASP.Net AJAX Array object.

Below is a breakdown of the issue with simplified code:

Default.aspx

MainScript.js

function getObject(){
    return new Array();
}

function function1(obj){
    var s=Sys.Serialization.JavaScriptSerializer.serialize(obj);
    alert(s);
}

function function2(){
    var obj=getObject();
    var s=Sys.Serialization.JavaScriptSerializer.serialize(obj);
    alert(s);
}

Content.aspx

ContentScript.js

function serializeObject(){
    var obj=window.top.getObject();
    window.top.function1(obj); // <– This works fine

    obj=new Array();
    window.top.function1(obj); // <– this causes an Out of Stack Space error
}

To view the code for the sample pages and JavaScript, click here.

The code for the ASPX pages couldn't be included here due to limitations. Refer to the link above to access the code for the ASPX pages.

The issue occurs on a web page (default.aspx) with an IFrame hosting a content page (content.aspx).

When clicking the "Serialize Object" button, the JavaScript function serializeObject() is called. Serialization works correctly for Array objects created in the main window (outside the frame). However, if the array object is created within the IFrame, serialization fails with an out of stack space error. The investigation revealed an endless loop in the ASP.Net AJAX JS files, where the system repeatedly attempts to determine the type of the array object. This continuous process triggers repeated calls to Number.IsInstanceOf, leading to the out of stack error.

Do you have any suggestions or solutions for this issue?

asp.net javascript asp.net-ajax

Answer 1

Answer №1

The issue arises due to the limitation of Sys.Serialization.JavaScriptSerializer in serializing objects from different frames. It can only serialize objects that were instantiated in the current window where the serialize() method is called. One workaround that I am aware of is to create a clone of the object from the other frame before invoking the serialize() method.

You can refer to an example of the clone() method with comments in Russian at this link: link text

Answer 2

The issue arises due to the limitation of Sys.Serialization.JavaScriptSerializer in serializing objects from different frames. It can only serialize objects that were instantiated in the current window where the serialize() method is called. One workaround that I am aware of is to create a clone of the object from the other frame before invoking the serialize() method.

You can refer to an example of the clone() method with comments in Russian at this link: link text

Answer 3

Answer №2

I transformed the sample into a series of static HTML files and obtained the standalone Microsoft Ajax Library 3.5 for testing. There were no issues encountered on Firefox 3 or IE 7, however, I did observe that the initial alert box showed an empty array [] and the second one an object {}.

Subsequently, I modified your code using the new Array() syntax:

  var obj = [];
  obj.push(1);

As a result, I received [1] and {"0", 1} in the alert boxes. It seems the problem does not lie with JavaScriptSerializer, but rather some issue related to passing objects between frames.

Answer 4

I transformed the sample into a series of static HTML files and obtained the standalone Microsoft Ajax Library 3.5 for testing. There were no issues encountered on Firefox 3 or IE 7, however, I did observe that the initial alert box showed an empty array [] and the second one an object {}.

Subsequently, I modified your code using the new Array() syntax:

  var obj = [];
  obj.push(1);

As a result, I received [1] and {"0", 1} in the alert boxes. It seems the problem does not lie with JavaScriptSerializer, but rather some issue related to passing objects between frames.

Answer 5

Answer №3

Currently, I don't have the means to verify your code, but based on my analysis, it seems there might be a flaw in the JavaScriptSerializer.serialize function. It seems likely that the issue lies in how it attempts to perform type checking on the array using the CLR, potentially not handling an empty array correctly.

Have you experimented with adding an element of a serializable type to the array in your script? If you have, what outcome did you observe?

Answer 6

Currently, I don't have the means to verify your code, but based on my analysis, it seems there might be a flaw in the JavaScriptSerializer.serialize function. It seems likely that the issue lies in how it attempts to perform type checking on the array using the CLR, potentially not handling an empty array correctly.

Have you experimented with adding an element of a serializable type to the array in your script? If you have, what outcome did you observe?

Error Encountered During Serialization with ASP.Net AJAX and JavaScript

Answer №1

Answer №2

Answer №3

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