I should preface this by saying I'm new to the whole data scheme in .NET,
having in the past only worked with direct SQL queries. And I would still be
working with said queries if this were not already a complete application
using the "correct" data access methods. :)
Basically, our situation is this. Every second, our equipment logs a piece
of a "strip" of data, 32 records per second. Obviously in a strip that is
about 3 minutes long, this turns into a ton of records. Each second, we store
those 32 records into a DataTable. At the end of each strip, we are calling
our SQLDataAdapter object from the main form, and calling the
..Update(TheDat aTable) method. The only problem is that these 5000 or so
records are taking like a full 3 minutes to store in the database, almost as
much time as it took to gather the data! My only guess is that it is
performing a separate insert query for each DataRow rather than automatically
seeing the opportunity for a Bulk Insert, and I see no way to force it into a
bulk mode. And really, doing manual inserts each second is not the way
either, because if the power goes off during a strip, we simply lose the
whole strip, rather than having data records in a corrupted or unknown state,
which is the preference here. So we do prefer to insert at the close of each
strip.
So, the obvious first question, have we approached it wrong, and are we
doing something incorrectly?
If that seems like the correct way, are there any optimization tips that can
improve the speed of insert?
Or any other ideas? 0 1155 This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
by: randy |
last post by:
Hello all,
I have a DataTable which I am building column by column and adding rows
after each new column. The DataTable columns match the columns in my
database table. I'm building the DataTable first and I then want to roll
through the DataTable while in memory checking for errors and then commit
the rows to my database table (btw this is in ASP.NET). Is it possible to
have data in a datable before attaching at DataAdapter? I'm a...
|
by: Doug Bell |
last post by:
Hi,
I thought I had this sorted this morning but it is still a problem.
My application has a DataAccess Class.
When it starts, it:
Connects to a DB (OLE DB)
If it connects it uses an OleDbCommand with an SQL String and the connection
it has a DataAdapter with the command
then it fills the DataSet's DataTable with the streamed data.
|
by: Zorpiedoman |
last post by:
I keep getting a concurrency exception the second time I make a change and
attempt to update a dataadapter. It appears this is by design, so there must
be something I can do to avoid it.
Example:
I have a dataadapter that contains one table with one row. I change the
value of the 'FisrtName' column in that row from Jack to John. I call
..update on the dataadapter it goes through fine. Now I change that same
column in that same row...
|
by: susan.f.barrett |
last post by:
Hi,
Despite me being able to type the following in to SQL Server and it
updating 1 row:
> updatestockcategory 1093, 839
In my code, it is not updating any rows.
dataSet = new DataSet();
|
by: Rich |
last post by:
Dim da As New SqlDataAdapter("Select * from tbl1", conn)
dim tblx As New DataTable
da.Fill(tblx) '--works OK up to this point
da.UpdateCommand = New SqlCommand
da.UpdateCommand.Connection = conn
da.UpdateCommand.CommandText = "Update tbl1 set fld1 = 'test' where ID = 1"
da.Update(tblx) '--tblx/tbl1 not getting updated here.
| |
by: George |
last post by:
Got a question about the side effect of DataAdapter.Update() and
DataTable.GetChanges().
Say I set up a DataTable and a DataAdapter in a class. Delete (Not remove)
a row in the data table and call the following method.
public void JobListDataTableFromAccessCommitChange()
{
System.Data.DataTable oChangeDataTable;
|
by: George |
last post by:
I have set DataAdapter.AcceptChangesDuringUpdate = true;
However, I find that I still need to call AcceptChanges on the associated
DataTable,
DataTable.AcceptChanges();
Has anyone encountered that? Am I not setting this field properly?
The following are some of the snippets of the codes which may help explain
|
by: Varangian |
last post by:
Hi all,
the question I want to ask if the conversion of a DataReader to a Table
looping through the DataReader is better than using the Fill Method of
the DataAdapter... I'm asking because internally the DataAdapter uses
the DataReader... so whats the deal of writing a method that converts a
DataReader into a DataTable ?
Thanks!
|
by: Frank |
last post by:
Hi,
imagine there's a WEB application reading data from an Oracle database
to visualize in using DataGrids in the clients browser. Yes, sounds
simple, just create OracleConnection + OracleCommand + DataAdapter,
bind a DataGrid to the DataAdapter, that's it.
Problem with that approach might be the hardcoded CommandString of the
OracleCommand. Whenever somebody requests query string changes you have
to adapt the C# code, to recompile and...
|
by: Varangian |
last post by:
Hi,
I have a performance issue question?
which is best (in terms of efficiency and performance, I don't care
neatness in code)... building an ArrayList of Object Instances using
SqlDataReader OR using SqlDataAdapter to Fill a DataSet or DataTable ?
Thanks!
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