RadAjaxManager RadGrid SharePoint Web-Part Code-Behind

[Mark]

Hi All,

I have an entirely code-behind (C#) RadGrid that is being used in a SharePoint web-part, and I would like to use a RadAjaxManager with it.  Can anyone please tell me and/or point me in the right direction for implementing one?

Thanks,
Mark

[Maria Ilieva]

Hello Mark,

Note that ajaxifying the telerik controls that are positioned within a user controls works somewhat differently from the scenario when they are loaded directly on a web form. In you case, you need to move the RadAjaxManager control to the web part class, create it there and add it to the Controls collection of the web part as follows:

private RadAjaxManager _ajaxManager;

protected override void OnInit(EventArgs e)
{
    base.OnInit(e);

    SetUpAjaxManagerOnPage();

    EnsureChildControls();
}


protected void SetUpAjaxManagerOnPage()
{
    RadAjaxManager currentAjaxManager = RadAjaxManager.GetCurrent(Page);

    if (currentAjaxManager == null)
    {
        Page.Form.Controls.AddAt(0, AjaxManager);
        Page.Items.Add(typeof(RadAjaxManager), AjaxManager);
    }
}

protected virtual RadAjaxManager AjaxManager
{
    get
    {
        if (_ajaxManager == null)
        {
            _ajaxManager = RadAjaxManager.GetCurrent(Page);

            if (_ajaxManager == null)
            {
                _ajaxManager = new RadAjaxManager() { ID = "RadAjaxManager1" };
            }
        }

        return _ajaxManager;
    }
}

Then in the OnLoad event of the web part, get the RadAjaxManager as follows:

RadAjaxManager _manager = RadAjaxManager.GetCurrent(Page);

and add your ajax settings programmatically. Beforehand, you should have the user control in the CreateChildControls method of the web part and there through FindControl you should retrieve the controls to ajaxify. Keep them in a private variable local to the web part class and use that in the OnLoad event to dynamically add the ajax settings.


Hope this information will prove helpful.


Regards,
Maria Ilieva
Telerik

[Mark]

Hi Maria!

Thanks for the reply.  I attempted to implement this to the best of my abilities, although I do not fully understand what is meant by, "Beforehand, you should have the user control in the CreateChildControls method of the web part and there through FindControl you should retrieve the controls to ajaxify. Keep them in a private variable local to the web part class and use that in the OnLoad event to dynamically add the ajax settings."

Applying the RadAjaxManager appears to disable filtering and paging in the RadGrid.  It appears to load just fine, but User interaction is limited.

Thanks,
Mark

[Maria Ilieva]

Hello Mark,

By having the UserControl into the WebParts CreateChildControls method I meant:

public class MyWebPart : System.Web.UI.WebControls.WebPart.WebPart
{


  protected override void CreateChildControls()
  {
    base.CreateChildControls();

   MyUserControl myUserControl = (MyUserControl)Page.LoadControl("~/_controltemplates/MyWebPart/MyUserControl.ascx");
    myUserControl.Web = SPContext.Current.Web;
    myUserControl.TextColor = this.TextColor;

    // Adds it to the controls collection of the Web Part
    this.Controls.Add(myUserControl);
  }
}

As for the functionality problems, I suppose that some js error appear when you are trying to filter or sort the RadGrid control. Please open the browser console and verify if any error appear.

Regards,
Maria Ilieva
Telerik