WebForm_DoCallback() - in iOS Chrome the success callback function is not fired when there are xml tags inside the response

Question

User1569515383 posted

In my ASP.NET website I have async callback requests by WebForm_DoCallback().

It works in all other browsers mobile Safari, desktop/android Chrome, FF, IE but not in mobile Chrome for iOS.

I found that in iOS Chrome (iPhone5) the success callback function is not fired when there are xml tags inside the response, for example 

s<Action>Add</Action>

. In this case "ReceiveCallBackData" is not fired on the client side:

protected void Page_Load(object sender, EventArgs e)
{
    Button1.Attributes["onclick"] = 
        Page.ClientScript.GetCallbackEventReference(this, "1", "ReceiveCallBackData", null, "ErrorMessage", true) + ";return false;";
}

public string GetCallbackResult()
{
    return "<Action>Add</Action>";
}

Any idea what can be the problem?

Answer 1

User-1778011532 posted

Hi,

I am also facing similar problem. 

In one aspx page(Framework is 3.5), ASP callback is implemented, on radio button click event, it is called. it is working in all browser except in IPhone (Safari & Chrome).

Initially, I thought radio button click event is not firing but it is firing and corresponding function is called.

at the end there is  

CallServer(argValue, "");

I think, This function is dynamically generated. 

function CallServer(arg, context) { WebForm_DoCallback('__Page',arg,ReceiveServerData,context,null,false);}//]]>
 

Here on WebForm_DoCallback call, it shows the following error.

"Uncaught ReferenceError: ReceiveServerData is not defined"

I found the following solution but it is not working.
http://esausilva.com/2015/02/05/asp-net-controls-ajax-extensions-not-working-in-ios-8-or-safari-8-telerik-controls/

http://www.brillianceweb.com/blog/article/69/aspnet-20-misidentifies-safari-71-on-ios-and-os-x#sthash.hqOcB1lK.dpbs

Please help me on this.