datakey on rowcommand in gridview in asp.net c#

In the gdview_RowEditing and gdview_RowDeleting event, we have used the below code to retrieve categoryid from datakey of GridView,


int catid = int.Parse(gdview.DataKeys[e.RowIndex].Value.ToString());



datakey at rowcommand
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Control ctl = e.CommandSource as Control;
      GridViewRow CurrentRow = ctl.NamingContainer as GridViewRow;
      object objTemp = gvUsers.DataKeys[CurrentRow.RowIndex].Value as object;
      if (objTemp != null)
      {
          string id = objTemp.ToString();
 //Do your operations
      }


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or
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GridViewRow grArtist = ((Control)
                (e.CommandSource)).NamingContainer as GridViewRow;

            //Check if command raised by DataRow or not
            if (grArtist.RowIndex != -1)
            {
                intUserGridID =
                    int.Parse(gvArtist.DataKeys[grArtist.RowIndex].Values
                    [AdminConstantKeys.UserID].ToString());

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