how to draw barchart for my table values

Question

hi, i am working c# with asp.net i need i have to retreive value from the database, im using sql server as my database and i have table emp and it has two columna name, marks.so i have to retreive those values from the database and show in that barchart, for example if the mark is 10 then the bar should be small and name has to display in the top of the bar and mark sould display in teh bottom of the bar. if the mark is 20 then the bar should be height than the value 10, like wise it has to increase. for this requirement give coding to do this pleeeeeeeese give me, i am waiting for ur reply