Question

i have database in access with auto increase field (ID).

i insert record like this (in C#)

SQL = "insert into TermNumTbl (DeviceID,IP) values ('" + DeviceID + "','" + DeviceIP + "') ";
OleDbCommand Cmd = new OleDbCommand(SQL, Conn);
Cmd.ExecuteNonQuery();
Cmd.Dispose();
Conn.Close();

how to get the last inserting number ?

i dont want to run new query i know that in sql there is something like SELECT @@IDENTITY

but i dont know how to use it

thanks in advance

Answer 1

More about this : Getting the identity of the most recently added record

The Jet 4.0 provider supports @@Identity

string query = "Insert Into Categories (CategoryName) Values (?)";
string query2 = "Select @@Identity";
int ID;
string connect = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|Northwind.mdb";
using (OleDbConnection conn = new OleDbConnection(connect))
{
  using (OleDbCommand cmd = new OleDbCommand(query, conn))

  {
    cmd.Parameters.AddWithValue("", Category.Text);
    conn.Open();
    cmd.ExecuteNonQuery();
    cmd.CommandText = query2;
    ID = (int)cmd.ExecuteScalar();
  }
}