Suppose , you have data stored in a array of structure. let us say, public struct myData { string name; int age; string city; public myData(string pName,int pAge,string pCity) { name=pName; age=pAge; city=pCity; } } ............... public void dataTableData() { List<myData> items=new List<myData>(); ...add name,age,city of each person to the object 'data'. //Now you need to add data present in the object 'items' to the GridView DataTable table=new DataTable(); DataRow row=null; //Create three columns 'Name','Age','City' table.Columns.Add(new DataColumn("Name",typeOf(string)); table.Columns.Add(new DataColumn("Age",typeOf(int)); table.Columns.Add(new DataColumn("City",typeOf(string)); //Now loop through the items present in the object 'items' foreach(myData item in