I recieved error when adding a order:
The variable name '@.oid' has already been declared. Variable names must be unique within a query batch or stored procedure.
The codes are:
comm = new SqlCommand("SELECT IDENT_CURRENT('Orders') as NewOrderID ");
comm.Connection = conn;
comm.Transaction = myTrans;
OrderID = Convert.ToInt32(comm.ExecuteScalar());
foreach (CartItem i in o.ItemList)
{
comm.CommandText = "INSERT INTO OrderDetail(OrderID, ProductID,Quantity, UnitPrice)VALUES (@.oid, @.pid, @.qty, @.price)";
comm.Parameters.AddWithValue("@.oid", OrderID);
comm.Parameters.AddWithValue("@.pid", i.ProductID);
comm.Parameters.AddWithValue("@.qty", i.Quantity);
comm.Parameters.AddWithValue("@.price", i.UnitPrice);
comm.Connection = conn;
comm.Transaction = myTrans;
comm.ExecuteNonQuery();
}
It seems that i can't add records into database with multiple loop.
Thanks in advance.
Well you want to only call once the insert for multiple items, that will optimize the code a little bit more.
Use TableAdapters, On the project right click and select Add New Item, select a DataSet and create a method to add multiple items!
|||Try to clear parameters after each insert.
Add this to the end of your code block:
...........
comm.ExecuteNonQuery();
comm.Parameters.Clear();
}
|||Thanksalbertpascual,
I'm not sure about using a TableAdapter, but does declaring the parameters outside the loop works?
I tried adding a dataset but with my limited 1month knowledge, I don't know how to complete the wizard or codes for the dataset.
if changing my existing codes works, it will be great.
thanks again,
|||Hey, thanks alot Limno!!
but adding this sweet and simple "comm.Parameters.Clear();" it works..
thanks!!
