c# - Problem creating datatable via code and binding to a datagridview -

i trying bind data table inventorytable datagrid viewer.the problem in code when compiles,it says column"make" not belong table make column in code follows:

public partial class form1 : form     {         list<car> listcars = new list<car>();         datatable inventorytable=new datatable();         public form1()         {             initializecomponent();             listcars.add(new car("chucky", "bmw", "green"));             listcars.add(new car("tiny", "yugo", "white"));             listcars.add(new car("ami", "jeep", "tan"));             listcars.add(new car("pain inducer", "caravan", "pink"));             listcars.add(new car("fred", "bmw", "pea soup green"));             listcars.add(new car("sidd", "bmw", "black"));             listcars.add(new car("mel", "firebird", "red"));             listcars.add(new car("sarah", "colt", "black"));             createdatatable();         }         void createdatatable()//create data table schema         {             datacolumn carmake = new datacolumn("make", typeof(string));             datacolumn carcolor = new datacolumn("color", typeof(string));             datacolumn carpetname = new datacolumn("petname", typeof(string));             foreach (car c in listcars)             {                 datarow dr = inventorytable.newrow();                 **dr["make"] = c.carmake;**//column 'make' not belong table.                 dr["color"] = c.carcolor;                 dr["petname"] = c.carpetname;                 inventorytable.rows.add(dr);             }             datagridview1.datasource = inventorytable;//binds data table grid view          }      } } 

i have added class form named car code follows:

class car     {         public string carpetname { get; set; }         public string carmake { get; set; }         public string carcolor { get; set; }         public car(string petname, string make, string color)         {             carpetname = petname;             carmake = make;             carcolor = color;         } 

please help!!!!!!!! p.s. (i wrote statement

datatable inventorytable=new datatable(); 

because when wrote datatable inventorytable, giving exception "object refence not set instance of object ".)

you need following:

datacolumn carmake = new datacolumn("make", typeof(string));  datacolumn carcolor = new datacolumn("color", typeof(string));  datacolumn carpetname = new datacolumn("petname", typeof(string));  // missing part: inventorytable.columns.add(carmake); inventorytable.columns.add(carcolor); inventorytable.columns.add(carpetname); 

you forgot add columns table when create row, has no columns in , code fails column name lookup.