c# - In my booking page how to prevent many users to select same truck at same time? -

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in booking page how prevent many users select same truck @ same time ?

in scenario when 2 user selecting truck imediately available have allow first user few milliseconds before second customer..

 system.web.ui.webcontrols.button lnkreport1 = (system.web.ui.webcontrols.button)e.commandsource;     string[] commandargs = e.commandargument.tostring().split(new char[] { ';' });    truckid.text = commandargs[0];    temp_memory_id.text = commandargs[1];      string status=string.empty;    sqlconnection con12 = new sqlconnection(configurationmanager.connectionstrings["bum"].connectionstring);    sqlcommand cmd12 = new sqlcommand(" select tr_status truckregistration id='" + truckid.text + "' ", con12);    con12.open();    sqldatareader dr = cmd12.executereader();     while(dr.read())    {         status = dr["tr_status"].tostring();    }    con12.close();      if (temp_memory_id.text == "immediate")       {           if (status != "in_process")           {               mp1.show();            }           else           {               showmessage("another customer has choosen before you, kindly choose trailor!", messagetype.warning);           }       }

create shared lock object on server side truck reserve , check it.


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