How to retrieve a value after calling loadState?

[Lee]

I'm trying to achive this scenario.
When a user visits my page, the persistence framework correctly pulls the correct RadDropDownTree1.SelectedValue from the cookie and restores the RadDropDownTree as I expect. The issue is when I try to read RadDropDownTree1.SelectedValue after calling loadState in my code below (highlighted in bold) the value is always empty "". I presume this is due to a timing issue? What would be the correct way to do this?


private static readonly string CookieName = "TestCookie";

protected void Page_Init(object sender, EventArgs e)
{
    RadPersistenceManager1.StorageProviderKey = CookieName;
    RadPersistenceManager1.StorageProvider = new CookieStorageProvider(CookieName);
}


protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {


        if (Request.Cookies[CookieName] != null)
        {
            RadDropDownTree1.DataBind();
            RadPersistenceManager1.LoadState();
            Label1.Text = RadDropDownTree1.SelectedValue;
        }
    }

}

protected void RadDropDownTree1_EntriesAdded(object sender, DropDownTreeEntriesEventArgs e)
{
    //save selections
    RadPersistenceManager1.SaveState();
}

[Nencho]

Hello Lee,

Unfortunately, the state of the control is not yet applied at the stage of the Page's lifecycle, where you aim to extract its SelectedValue.

For this reason, I would suggest you to use the Page_PreRenderComplete event handler, as demonstrated below:

protected void Page_PreRenderComplete(object sender, EventArgs e)
{
    Label1.Text = RadDropDownTree1.SelectedValue;
}

Hope this would help.

Regards,
Nencho
Telerik

[Lee]

Perfect, thanks for your help