How to: Implement a Summary Whose Value Depends upon an External Editor Value

  • 2 minutes to read

The following example calculates a summary in the CategoryID column based on the value in the ASPxSpinEdit below it.

When an end user changes a spin editor value, the editor sends a custom callback to the server in the client-side NumberChanged event handler. In the server-side SummaryDisplayText event handler, the grid calculates the summary value and sets it to the e.Text parameter.

View Example

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void ASPxCardView1_SummaryDisplayText(object sender, DevExpress.Web.ASPxCardViewSummaryDisplayTextEventArgs e)
    {
        if (e.Item.FieldName == "CategoryID")
            e.Text = string.Format("Sum = {0}", Convert.ToDouble(e.Value) * Convert.ToDouble(ASPxSpinEdit1.Value));
    }
}