PageViewPage - ErrorProvider.SetError()

[Doug]

I'm open to alternatives.

I would like to use the ErrorProvider to set error text on the tabs of PageViewPages.  Can that be done?

(As an alternative, I can modify the text on the tab to indicate that the page has errors on it.)

Thank you,
Gary

[Dess | Tech Support Engineer, Principal]

Hello Gary,

Thank you for contacting Telerik Support.

Please refer to the following code example demonstrating how to manage errorProvider for each RadPageViewPage:

public Form1()
{
    InitializeComponent();

    errorProvider1.BlinkStyle = ErrorBlinkStyle.AlwaysBlink;

    this.radPageView1.SelectedPageChanging += radPageView1_SelectedPageChanging;
    this.radPageView1.ViewMode = PageViewMode.Strip;
}

private void radPageView1_SelectedPageChanging(object sender, Telerik.WinControls.UI.RadPageViewCancelEventArgs e)
{
    RadPageView pageView = sender as RadPageView;
    if (!ValidatePage(pageView.SelectedPage))
    {
        int index = this.radPageView1.Pages.IndexOf(this.radPageView1.SelectedPage);
        int X = ((RadPageViewStripElement)this.radPageView1.ViewElement).Children[0].Children[0].Children[index].BoundingRectangle.X;

        e.Cancel = true;
        errorProvider1.SetIconAlignment(pageView.SelectedPage, ErrorIconAlignment.TopLeft);
        errorProvider1.SetIconPadding(pageView.SelectedPage, -X - 50);
        errorProvider1.SetError(pageView.SelectedPage, string.Format("Invalid {0}", pageView.SelectedPage.Text));
    }
    else
    {
        errorProvider1.SetError(pageView.SelectedPage, string.Empty);
    }
}

private bool ValidatePage(RadPageViewPage radPageViewPage)
{
    switch (radPageViewPage.Text)
    {
        case "radPageViewPage1":
            if (radTextBox1.Text == string.Empty)
            {
                return false;
            }
            return true;
        case "radPageViewPage2":
            if (radToggleButton1.ToggleState == Telerik.WinControls.Enumerations.ToggleState.Off)
            {
                return false;
            }
            return true;
        case "radPageViewPage3":
            return false;

        default:
            return true;
    }
}

Note that positioning the .NET errorProvider icon is not quite customizable, so I were forced to use icon padding in order to position correctly the exclamation mark under the middle of each RadPageViewPage header.

I hope this information helps. Should you have further questions, I would be glad to help.

Regards,
Desislava
Telerik