Highlight rows with collapsible nested grid

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C#

ASP.NET

Javascript

Gridview

, +

Hi.

I am creating a web page with collapsible grid, so my gridview is nested and can be expanded/collapsed when the plus sign is clicked.

Now, I need to highlight the row in line with the plus sign only (not including the expanded div)

I used client side onclick event for the gridview row which I assign the onclick value on datarowbound.

var prevRowIndex;

       function ChangeRowColor(row, rowIndex) {
           var parent = document.getElementById(row);
           var currentRowIndex = parseInt(rowIndex) + 1;

           if (prevRowIndex == currentRowIndex) {
               return;
           } else if (prevRowIndex != null) {
               parent.rows[prevRowIndex].style.backgroundColor = "#FFFFFF";
           }

           parent.rows[currentRowIndex].style.backgroundColor = "#FFFFD6";
           prevRowIndex = currentRowIndex;

Here's the rowbound

protected void gvStudent_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            if (e.Row.RowType == DataControlRowType.DataRow)
            {
                e.Row.Attributes.Add("onclick", string.Format("ChangeRowColor('{0}','{1}');", e.Row.ClientID, e.Row.RowIndex));
}

My problem is that when row index 0 is expanded and I click on the row index 1, the expanded div of row index 0 gets highlighted, I think because it is being read as a new row and becomes row index 1

What I have tried:

This idea I adapted from the link below

Highlight GridView Row On Click And Retain Selected Row On Postback[^]