Confirm closing of a RadWindow by using radconfirm

Requirements
Article relates to :	All version of RadWindow for ASP.NET and all versions of RadWindow for ASP.NET AJAX Q32008 and above
Visual Studio version	2005/2008
programming language	Javascript

 
PROJECT DESCRIPTION 
A confirmation dialog in case  the Close button is clicked is useful in cases when you want to prevent the user from accidentally closing the dialog.  

Bellow we describe two approaches that can be used, according of the version of the RadWindow control.

RadWindow for ASP.NET AJAX:

In version 2008.3 13.14 and above we implemented the OnClientBeforeClose event in the control and you can use it in order to achieve the desired functionality. You need to follow the steps bellow :

• attach a handler to that OnCliendBeforeClose event. This step needs to be when the RadWindow object is created:
  
  function showBuildSchedule()

  {

      var oWindow = window.radopen("Popup.aspx", "BuildScedulerWindowID");

      oWindow.add_beforeClose(onBeforeClose);

      oWindow.setSize(830, 570);

      oWindow.center();

  }
• Implement the OnClientBeforeClose handler as follows :
  

  function onClientBeforeClose(sender, arg)

  {

  function callbackFunction(arg)

  {

  if (arg)

  {

  sender.remove_beforeClose(onClientBeforeClose);

  sender.close();

  }

  }

  arg.set_cancel(true);

  radconfirm("Are you sure", callbackFunction, 300, 100, null, "Close RadWindow");

  }

  The OnBeforeClose handler after confirmation the closing.

RadWindow for ASP.NET :

In this version the desired result can be achieve by registering to the onclick event of the RadWindow's close button and to call a confirmation dialog there. Depending on the user's answer, you can close the window or leave it as is.

In the attached project - ASP.NET Classic, we are using a radconfirm dialog. Since it is non-blocking, we also provide a callback function to process the user's reply.

I have tried to set this up on my page and I am getting null error on line 25 of your aspx page

var CloseButton = document.getElementById("CloseButton" + oWnd.Id);

 

 

CloseButton.onclick = function()

 

{

CurrentWinName = oWnd.Id;

//radconfirm is non-blocking, so you will need to provide a callback function

radconfirm("Are you sure you want to close the window?", confirmCallBackFn);

}

 

 

 

 

}

it dies at the part that I have in bold.

 

Hi Irish,


Greetings,
Fiko
the Telerik team

Hi,

I'm also having a problem with this sample but in a slightly different area:

For me it crashes a little earlier on the following line:

var

CloseButton = document.getElementById("CloseButton" + oWnd.Id);

 

The problem appears to be that the close button doesn't have an id (I've tried inspecting the dom for the rad window using IE developer tool bar and the close button a tag has a class but no id).

Hello Ian,

You can find two working approaches for RadControls for ASP.NET AJAX (the code here is for RadWindow for ASP.NET) in this forum  thread.

I hope this helps.

Regards,
Fiko
the Telerik team

Hello I just upgraded to version 2009, and in my previous version had this feature, and now no longer works, I need this functionality.
The CloseButton is null always. 
what can I do?

function OpenWindow()

{

    radopen(

"http://www.google.com","RadWindow2"); 
    //Make sure to pass the correct window name as  
    //an argument when calling the ConfirmClose() function

 

     

ConfirmClose("RadWindow2");

 

 

}

 

function ConfirmClose(WinName)

{

 

    var oManager = GetRadWindowManager();

    var oWnd = oManager.GetWindowByName(WinName);

    //Find the Close button on the page and attach to the

 

    //onclick event

 

    var CloseButton = document.getElementById("CloseButton" + oWnd.Id);// Dont work,  CloseButton is null always??

    CloseButton.onclick =

 

        function()

        {

            CurrentWinName = oWnd.Id;

 

            //radconfirm is non-blocking, so you will need to provide a callback function

            radconfirm(

"Are you sure you want to close the window?", confirmCallBackFn);

 

 

        }
}

 

 

Hi Ivantkt,

The code library is updated with a sample for RadWindow for ASP.NET AJAX.

Best wishes,
Fiko
the Telerik team

Hello

Here is a typo in the code library confirmclosing-ajax.zip:
   oWindow.add_beforeClose(onBeforeClose);
should be changed to:
  oWnd.add_beforeClose(onBeforeClose);

Regards,
Tonino.

Hello again!

Is there a way to handle the close-window-event in Popup.aspx?

Regards,
Tonino.

Hi Tonino,

Thank you for the feedback. I have updated the confirmclosing-ajax.zip project in the code library.

I believe that this code library is exactly what you need.

Regards,
Fiko
the Telerik team