问题
I have worked on retrieving the data from SQL database using Datareader and populate it in Datatable.. But, I am wondering whether is there any way to handle the data from datareader without using datatable ? I mean- handling the table values using Objects should be more preferable..
But, I dont want to use LINQ here since, I am going to use ADOMD object to pull the data from database(Cubes)..
回答1:
Have a look at dapper-dot-net. I'm not sure how it works with ADOMD.NET, but it does neatly materialise query results in dynamic objects.
回答2:
Just loop thrugh the items and set it as the property values of your custom class. The below example read data from Customer table and Create a List of Customer Class object. Assuming you have a Customer POCO with ID and Name as Properties
List<Customer> custList= new List<Customer>();
string connString="yourConnectionStringHere";
using (var conn = new SqlConnection(connString))
{
conn.Open();
using (SqlCommand cmd = new SqlCommand())
{
cmd.Connection = conn;
cmd.CommandType = CommandType.Text;
cmd.CommandText = "SELECT ID,NAME From Customer";
using (var reader = cmd.ExecuteReader())
{
if (reader.HasRows)
{
while (reader.Read())
{
var cust= new Customer();
if (!reader.IsDBNull( reader.GetOrdinal("ID")))
cust.ID = reader.GetInt32(reader.GetOrdinal("ID"));
if (!reader.IsDBNull( reader.GetOrdinal("Name")))
cust.Name = reader.GetString(reader.GetOrdinal("Name"));
custList.Add(cust);
}
}
}
}
}
回答3:
public List GetEmployee(string spname) {
con.Open();
cmd = new SqlCommand();
cmd.Connection = con;
cmd.CommandText = spname;
cmd.CommandType = CommandType.StoredProcedure;
reader = cmd.ExecuteReader();
List<EmployeeDetails> lstemp = new List<EmployeeDetails>();
while (reader.Read())
{
EmployeeDetails emp = new EmployeeDetails();
emp.EmployeeId =Convert.ToInt32( reader["EmployeeId"].ToString());
emp.FirstName = reader["FirstName"].ToString();
emp.LastName = reader["LastName"].ToString();
emp.DOB = Convert.ToDateTime(reader["DOB"].ToString());
emp.Gender = Convert.ToInt32(reader["Gender"].ToString());
emp.QName = reader["QName"].ToString();
emp.Dname = reader["DName"].ToString();
emp.Email = reader["Email"].ToString();
lstemp.Add(emp);
}
return lstemp;
}
来源:https://stackoverflow.com/questions/11988441/retrieve-datareader-using-objects