Question

i have 4 objects in my database eg zen ,maruthi and scorpio ..after binding the values to dropdown list i can only see scorpio repeated 3 times ..

instead of getting it as

zen
maruthi
scorpio 

..i get scorpio

scorpio 
scorpio..

Code

List<Cab> CabTypeList = new List<Cab>();
using (DataTable table = SqlDBConnector.ExecuteSelectCommand("GetCabType", CommandType.StoredProcedure))
{
    //check if any record exist or not
    if (table.Rows.Count > 0)
    {
        //Lets go ahead and create the list of cab

        foreach (DataRow row in table.Rows)
        {
            cab.CabType =  row["CabType"].ToString();
            cab.CabId = Convert.ToInt32(row["Cab_Id"]);
            CabTypeList.Add(cab);
        }
    }
}

ASPX page

if (!IsPostBack)
{
    CabDbAccess cabdbaccess = new CabDbAccess();
    DropDownList1.DataSource = cabdbaccess.GetCabType();
    DropDownList1.DataTextField = "CabType"; // the items to be displayed in the list items
    DropDownList1.DataValueField = "CabId"; // the id of the items displayed
    DropDownList1.DataBind();
}

Answer 1

Where is cab coming from ? Make sure you are adding a new item in the foreach loop.

public List<Cab> GetCabType()
{  
   List<Cab> CabTypeList = new List<Cab>();
   // to do : get your data in the data table. 
   foreach (DataRow row in table.Rows)
   {
     var cab= new Cab();
     cab.CabType =  row["CabType"].ToString();
     cab.CabId = Convert.ToInt32(row["Cab_Id"]);
     CabTypeList.Add(cab);
   }
   return CabTypeList;
}