How to show RadWindowManager.RadAlert from Sshared method

[Kosta]

Hi,

How to display RadWindowManager.RadAlert from shared ( static ) method. My scenario is as follows:

1. When a user click on a button a java script function is executed with that code:

Page.ClientScript.RegsterStartupScript(Me.GetType(), "alert", "OpenActiveX();", True)

2. After javascript function finished its work I call a static function into asp.net code behaind with PageMethods

function OpenActiveX() {
    try {
        var xml = document.getElementById('MainContent_XmlTextReference').value;
        ...
        PageMethods.SaveXmlFile(xml)
    }
    catch (Err) {
        alert(Err.description);
    }
}

and here is how SaveToXml method is defined

<Services.WebMethod()> _
    Public Shared Function SaveXmlFile(ByVal xml As String) As Boolean
        ' work with returned from java script data

         Here need to display an alter when work with data is finished

        Return True
    End Function

I have 

Public Class MyPage
    Inherits System.Web.UI.Page

    Private Shared MyPageHandle As MyPage

    Protected Sub Page_Load(sender As Object, e As System.EventArgs) Handles Me.Load
        If Not Page.IsPostBack Then
            Try
                MyPageHandle = Me
                ...
        End If
    End Sub

    <Services.WebMethod()> _
    Public Shared Function SaveXmlFile(ByVal xml As String) As Boolean
        ...

        MyPageHandle.RadWindowManager1.RadAlert("test", 100, 100, "test", 0)

        Return True
    End Function
End Class

add a RadWindowManager to web page named and after that try to call it from shared method
without success

Thank you

[Marin Bratanov]

Hello Kosta,

The following line will cast the handler from the shared method to a page:

Dim currentPage As Page = DirectCast(HttpContext.Current.Handler, Page)

You would then need to find the RadWindowManager in the code-behind (e.g. Page.FindControl()):

Dim currentPage As Page = DirectCast(HttpContext.Current.Handler, Page)
DirectCast(currentPage.FindControl("RadWindowManager1"), Telerik.Web.UI.RadWindowManager).RadAlert("test", 100, 100, "test", "")

What I can advise is using the JavaScript onSuccess handler to simply call the radalert() client-side method. You can return the needed data as a string instead of a boolean value. If more than one string is needed you can concatenate them with a special symbol (e.g. "|") and split it on the client to get the necessary arguments.

Regards,
Marin Bratanov
the Telerik team

[Kosta]

Thank you, Marin,

I modified my javascript code to and now works great.

function OpenActiveX() {
    try
        var xml = document.getElementById('MainContent_XmlTextReference').value;
        ...
        PageMethods.SaveXmlFile(xml, onSuccess)
    }
    catch (Err) {
        alert(Err.description);
    }
}

function onSuccess(pageMethodReturnValue, importantValue) {
    radalert("Finish", "350", "150", "alert");
}