Drop down list not binding with sqldatareader

Question

i have a form with a collection of about five drop down . i have my query as follows .

 string sql = \"SELECT a.clientID ,a.[cname],b.bid,b.[bname],c.contactID,          


        

Answer 1

Reader is readonly and forward only that's why only first dropdonw get filled with data and others are empty. You can use datset or Datatable for same problem .

  SqlCommand cmd = new SqlCommand(sql, connection);
    cmd.CommandType = CommandType.Text;


    Dataset dsresult = cmd.ExecuteDataset();
   If(dsResult !=null)
   {
     if(dsResult.Rows.count>0) 
    {
    drClient.Enabled = true;
    drClient.DataSource = dsResult.Tables[0] ;
    drClient.DataTextField = Convert.ToString(ds.Tables[0].Columns["cname"]);
    drClient.DataValueField = ds.Tables[0].Columns["clientID"] ;
    drClient.DataBind();

    }

   }  

Datareader is connected architecture needs continuous connection and fetches one row at a time in forward mode better use dataset which uses disconnected architecture and can be used for retrieving data multiple times.