ASPxCardView.InvalidCardIndex Field

Contains a value that is an invalid card index. This value is returned when an attempt to obtain a particular card fails, etc.

Namespace: DevExpress.Web

Assembly: DevExpress.Web.v19.1.dll

Declaration

C#

public const int InvalidCardIndex = -2147483648

VB.NET

Public Const InvalidCardIndex As Integer = -2147483648

Field Value

Type
Int32

Example

This example shows how to focus a card which isn’t displayed on the current page. To do this, you should first switch to the page which contains the required card, and then move the card focus.

C#

protected void Button1_Click(object sender, EventArgs e)
{
    // Obtain the visible index of the required card.
    int cardIndex = ASPxCardView1.FindVisibleIndexByKeyValue("OLDWO");
    if (cardIndex == ASPxCardView.InvalidCardIndex) return;
    if (!IsCardVisibleOnScreen(cardIndex))
    {
        // Switch to the page which contains the required card.
        GoToPage(cardIndex);
    }
    // Focus the required card.
    ASPxCardView1.FocusedCardIndex = cardIndex;
}

bool IsCardVisibleOnScreen(int cardIndex)
{
    int startIndex = ASPxCardView1.PageIndex * ASPxCardView1.SettingsPager.PageSize;
    int endIndex = startIndex + ASPxCardView1.SettingsPager.PageSize;
    return cardIndex >= startIndex && cardIndex < endIndex;
}
void GoToPage(int cardIndex)
{
    ASPxCardView1.PageIndex = cardIndex / ASPxCardView1.SettingsPager.PageSize;
}