asked on

Telerik RadPanelBar inside FormView on Content page

Hello Experts,

How dow I get the Current Panel Item. The demo on the Telerik website has this and it works

private void GoToNextItem()
{
int selectedIndex = RadPanelBar1.SelectedItem.Index;

if ((selectedIndex + 1) < RadPanelBar1.Items.Count)
{
RadPanelBar1.Items[selectedIndex + 1].Selected = true;
RadPanelBar1.Items[selectedIndex + 1].Expanded = true;
RadPanelBar1.Items[selectedIndex + 1].Enabled = true;
RadPanelBar1.Items[selectedIndex].Expanded = false;
}
}

Since my RadPanelBar is inside a formview I need for use FindControl to see it.

Telerik.Web.UI.RadPanelBar RadPanelBar1 = dvwOrders.FindControl("RadPanelBar1") as Telerik.Web.UI.RadPanelBar;
Telerik.Web.UI.RadPanelItem thisRadPanelItem = RadPanelBar1.Items[0].Controls[0] as Telerik.Web.UI.RadPanelItem;

If then I try to do this, I get an error

int selectedIndex = RadPanelBar1.SelectedItem.Index;

Thank you

Howard

Bob Learned

It would be helpful to know the exception...

Howard Katz

ASKER

I have changed this line from this:

int selectedIndex = RadPanelBar1.SelectedItem.Index;

to this and I do not get the error.

int selectedIndex = thisRadPanelItem.Index

The problem is that when I hit the Next button, the value of selectedIndex is always 0.
It seems that each time I hit the Next button, I re-initialize the control as if for the first time. any ideas ?

Thanks

Bob Learned

How are you binding the RadGrid? How are you building the data source? The usual culprit is rebuilding the data source on every post-back, instead of checking for Page.IsPostBack.

Howard Katz

ASKER

At this point I am not binding. There will be 3 panels and I have a radion button list that must have a value or you cannot get to the next panel. This works. When I click on the Next button it fires this.

protected void nextButton_Click(object sender, EventArgs e)
{
GoToNextItem();
}

Which calls this:

private void GoToNextItem()
{
Telerik.Web.UI.RadPanelBar RadPanelBar1 = dvwOrders.FindControl("RadPanelBar1") as Telerik.Web.UI.RadPanelBar;
Telerik.Web.UI.RadPanelItem thisRadPanelItem = RadPanelBar1.Items[0].Controls[0] as Telerik.Web.UI.RadPanelItem;

int selectedIndex = thisRadPanelItem.Index;

RadPanelBar1.Items[selectedIndex + 1].Selected = true;
RadPanelBar1.Items[selectedIndex + 1].Expanded = true;
RadPanelBar1.Items[selectedIndex + 1].Enabled = true;
RadPanelBar1.Items[selectedIndex].Expanded = false;
}

The value of selectedIndex is alway 0. So I never get to panel 3.

ASKER CERTIFIED SOLUTION

Bob Learned

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Howard Katz

ASKER

Actually I figured out my problem. By setting Selected = "True" on the aspx page, and changing the second line from this.

Telerik.Web.UI.RadPanelItem thisRadPanelItem = RadPanelBar1.Items[0].Controls[0] as Telerik.Web.UI.RadPanelItem

to this.

Telerik.Web.UI.RadPanelItem thisRadPanelItem = RadPanelBar1.SelectedItem;

It now works. So I award you the points for your persistant effort. Thank you.

Bob Learned

That's funny, because I don't understand how that could work, and the other one doesn't...maybe because I don't have a clear picture of what you are working with.