Summary row item for editable checkbox column

[Zygmunt]

Hi
I have RadGridView with editable checkbox column. I created custom summary row item which code i presented below.

public class CheckedRowsSummaryItem : GridViewSummaryItem
    {
        public CheckedRowsSummaryItem(string name, string formatString, GridAggregateFunction aggregate)
            : base(name, formatString, aggregate)
        { }
        public override object Evaluate(IHierarchicalRow row)
        {
            int count = 0;
            foreach (GridViewRowInfo childRow in row.ChildRows)
            {
                try
                {
                    if ((bool)childRow.Cells["chkBoxKol"].Value)
                    {
                        count++;
                    }
                }
                catch { }
            }
            return count;
        }
    }

 

My problem is that when I change the chceckbox state my custom row summary for the column is not refreshed until I change current row or current cell. I tried to set IsCurrent properity on false or rise EndEdit() method for the grid in CellBeginEdit event but these solutions not worked. How could I programmatically make my summary refresh to avoid changing current column by the user?

 

All the best

[Dess | Tech Support Engineer, Principal]

Hello, Zygmunt,

According to the provided information, it is not clear how the GridViewCheckBoxColumn is setup on your end. However, I would recommend you to set its EditMode property to OnValueChange. Thus, you will ensure that as soon as you toggle the checkbox, the value will be committed to the associated DataBoundItem. 

The EditMode property controls when the value of the editor will be submitted to the cell. By default, the current behavior is kept (OnValidate) and the value will be submitted only when the current cell changes or the grid looses focus. The new value (OnValueChange) will submit the value immediately after the editor value changes.

Thus, your custom summary item is expected to calculate the value as expected.

I hope this information helps. If you need any further assistance please don't hesitate to contact me. 

Regards,
Dess | Tech Support Engineer, Sr.
Progress Telerik

[Massoud]

I've set the EditMode for a check box column, but the summary item is not updated upon changing the check state of the column in any row. Could you please let me know what the problem is it ?

[Dess | Tech Support Engineer, Principal]

Hello, Zygmunt,

By using the provided code snippet in your initial post, I have prepared a sample project which result is illustrated in the attached gif file. Please give the sample project a try and see how it works on your end.

In case you are still experiencing any problems with implementing such a behavior in your project, please give is more details about the exact setup that you have and how it differs from my sample project. Once we replicate the undesired behavior on our end, we would be able to investigate the precise case and provide further assistance. 

Should you have further questions please let me know.

Regards,
Dess | Tech Support Engineer, Sr.
Progress Telerik