how to grant alter permission on SP_TRACE_CREATE

USE [master]
GO
GRANT ALTER TRACE TO [LOGIN]
GO

How to get the row in GridView RowCommand Event

C#

var row = ((Control)e.CommandSource).NamingContainer as GridViewRow;

How to disable/enable buttons and links (jQuery + Bootstrap)

jQuery.fn.extend({
   disable: function (state) {
      return this.each(function () {
         var $this = jQuery(this);
         if ($this.is('input, button'))
            this.disabled = state;
         else if($this.is('a'))
            $this.toggleClass('disabled', state);
      });
   }
});

How to use IndexOf() method of List <object> asp net c#

var index = students.FindIndex(st => st.ID == student.ID);

Using DataBinder.Eval in the RowDataBound Event asp net gridview

decimal totalAmount = 0;
protected void gv_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
 totalAmount += Decimal.Parse(DataBinder.Eval(e.Row.DataItem, "Amount").ToString());
}
}