SSCE With Flash Memory
Dec 11, 2007
Hi,
I have a question about using SSCE with flash memory. Our CE components equally allocate the write access to the memory location. But write access is guaranteed only 10000 times per memory cell.
So I need to know
1. what changes are made to the file system if I add an entry to a table?
Is this entry the only information added to the file system?
2. What happens if I delete an entry? Will SSCE optimize the data in the filesystem?
Thanks a lot for helping.
Regards Flo
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Mar 17, 2008
Hi,
I hope somebody here can help on my problem.
I wrote a MFC application using sql ce and is running prefectly smooth on wince and PPC 2003.
But when i deploy it to Windows Mobile, the database performance drop dramatically.
I knows the drop on performance is due to the I/O speed on the flash memory.(The previous mobile os are using ram instead).
Is there any solution or work around which I can solve this problem.
Recently i solved the performance issues on "insert" to DB by using a commit buffer(Instead of commit to the sdf instantly).
But how about the "select" performance? It's too slow which take about 3 sec to select a record from the DB.
Does Microsoft provide any suggestion on the sqlce perofrmance on windows mobile?
Thanks
Keith
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Mar 13, 2007
Hi there SQL TEAM
Can someone please point me in the right direction?
We have a customer who would like us to write an application in flash that has a SQL 2005 Backend
Can Flash integrate with Microsoft sql 2005?
And if so are there any tutorials?
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Mar 3, 2008
have query flash back facility in sqlserver 2005?
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Jul 20, 2005
I have a utility I wrote which can backup/restore my database as wellas schedule backups. This has always worked pretty well except when Itry to backup to a USB Flash Disk. When I use one of these the backupfails. If I backup to the C:/ drive then copy it over to the disk itworks fine but when SQL Server tries to do it, it can't.I am simply doing the following:BACKUP DATABASE MyDatabase TO DISK = 'E:/backup.dat_bak' WITH INITAnyone know what could be going wrong?
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Jan 26, 2005
Hi friends, i want to know something abt sql server installation and database properties as under.1) how much disk space reqd by multiuser sqlserver 2000 db to install ?2) is it possible to install sql 2K on Flash Drive ( gen connect at USB) ?3) When v create a database user Enterprise Manager , which files created by database ?4) If i Know datafiles name of a database e.g. pubs , and if v copied on cd and paste on other system which has sql 2K install , does those database works ?5) is it possible to create database on flash drive ? thanx in advance.
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Mar 9, 2007
I am not sure if this is the right folder to post, but currently I'm considering using Flash as an interface, the application at www.mobik.com seems impressive, simple and sweet. But I'm wondering if I can build desktop application with flash and SQL2005 as backend for all the processing. at the same time, the flash shall be getting updates from a server. Possible?
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Jan 10, 2007
I'm working on a project where the client wants us to create custom charts which have features not found in the standard Reporting Services charts. I would like to use flash to build this and have found an existing flash charting package for which I have the code and which I plan to expand.
Here's the problem:
The client wants to include these charts in his Reports. Is there some way to add a flash control to a report so that it will appear on the web page as a fully-functional flash presentation, which can then be included when printing or exporting?
The alternative, would be to figure out some means of generating the chart using flash outside of the report, exporting a bitmap of the chart and then saving the bitmap to a known location on the file system so It can be referenced by a report. This has some serious complications, and may not be feasible.
Any ideas?
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Jul 12, 2007
Hello everyone,
I'm currently developping a windows .net compact framework application which is basically a local datalogger.
Since my application will log data to the database (located on compact flash card) a few times a second over long period, I wonder if SQL Server Compact Edition offers some mechanism to reduce disk access.
By example, can SQL Server compact edition wait let's say 5-10 "insert into" commands before actually write to the database located on the flash card ?.
Any ideas which could help me to reduce flash wear would be greatly appreciated !
Thanks
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Apr 28, 2008
I want to copy a database in my company's computer to my flash driver.
Then I am going to copy this database to my home compuer.
What is the full procedure?
Thanks
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Mar 29, 2008
Hello friends,
So, this is my senario...
i'm using SQL 2005 reporting service which reports are shown to the client from my web-site...
I've included a report viewer in my ASPX page through which i'm displaying the reports.
I wanted to know if their is any way by which i can embed a flash file in my report.
Secondly, i have some reports in which I have used the matrix control. And to display the headings of the columns i've created individual text-boxes & have made them overlap on the top region of the matrix.thoe these text boxoes are getting rendered in proper places when i preview the reports during design time, but when they get rendered in my website all the heading text-boxes get scattered all 'round the report......has anyone faced such weired problems & is there any alternate way of do'in the same ??
thanks in advance,
regards,
Rohan
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Dec 1, 2006
Hi
Can someone please tell me if it is possible to insert a flash movie into MSSQL 2005 and if so what would be the most appropraite data type to use for this.
Any links to tutorials on how to uplaod such fiules would be appreciated
Cheers
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Dec 17, 2007
Hi There,
Can I store flash files in the database. I have a table with one of the columns as varbinary datatype. Previously, I was saving images (as filebytes) into this column. But now I need to implement something to store the flash file. So, is it possible to store flash files in the database and retrieve them and display them in an asp.net page?
Thanks a lot for your suggestion!!
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Mar 1, 2008
Hi
How to store flash files into the sql server 2000 database and again display them back in asp.net/C# user interface?thanks
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Apr 4, 2007
Hi
Does anyone have an example code in C++ to create a SSCE db and access data?
Many thanks
Ozzie
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Jul 31, 2007
hi,
this is my first post here, i am using Sql Server CE 2005 these days.
in a project i found 2 problem that can't find any solution for them till now , maybe there are some bugs i founded them
here is :
1- when i have a SqlCeCommand Object and the ComandText for it is "Update [Term] SET Year=? WHERE _id=? AND name=? "
the problem is in here , i added parameters for this command, if value of parameter is in Unicode ( i tested it in Farsi[Persian] language value like 'زمستان' on 'name' parameter) , in ExcuteNonQuery() method , it throws FormatException with "Input String was not a correct format".
although if i change the value of 'name' parameter to something non-unicode (for example i tested it with 'ABCDE' ) it works correctly,
i think SqlCeCommand in UPDATE query , have problem with unicode values in paramteres.
2- second one is so strange for me !! , i have a loop that update a column in a table. and then have another loop that update the next column of that table. for example first i update the column 3 in loop, then in another loop i update the column 4.
after all, the value of column 4 and 3 is substituted, it means that values that i updated for column 3 is in column 4 , and values that i updated for column 4 is in column 3 !!!!!!!
both columns is in 'int' type.
and the last point is i tested both of this situations in SQL Server 2000 Developer Edition and both worked correctly without any problem.
also i used SQL Server CE v3.1 with .Net framework 2.0 in Vs2005 and C#.
is there any missing i'v done or is it some kind of bugs.
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May 16, 2007
We are looking into developing our application using SQL Server Compact and have created a test database to become familiar with the API. Having read about ACID transactions in SSCE we would like to know how this is actually employed. What will happen if a power failure occurs during a transaction? Does this have to be recovered in the code?
I have read the following article: http://msdn2.microsoft.com/en-us/library/csz1c3h7.aspx, but is this the best way to deal with transaction failures?
I can't find any examples on how to recover from failures in transactions in SSCE.
Any help would be greatly appreciated.
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Jun 11, 2007
Hi,
Are there any pecularities of Transaction Logs in SSCE comparing to the same log in full scale SQL Server? How are they stored? And when they are considered to be expired in order to safely delete them?
Thanx in advance
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May 18, 2007
i'm use this code ,in SQL2005 std and ACCESS database, it work
but if i use SSCE ,it's throw a OleDbException in ExecuteScalar()
Exception : OleDbException
0x80040E30L
DB_E_BADTYPENAME
Code Snippet
OleDbConnection od = new OleDbConnection("Provider=Microsoft.SQLSERVER.MOBILE.OLEDB.3.0;Data Source=db.sdf;SSCE:Database Password=");
od.Open();
OleDbCommand og = new OleDbCommand("INSERT INTO [bills] ([billno],[checkouttime],[finalprice],[handle],[ischeckout],[memo],[paymode],[trick]) VALUES (@billno,@checkouttime,@finalprice,@handle,@ischeckout,@memo,@paymode,@trick)", od);
og.Parameters.Add("@billno", OleDbType.VarWChar).Value = "2007051800000000";
og.Parameters.Add("@checkouttime",OleDbType.DBTimeStamp).Value="2007-5-18 11:55:40";
og.Parameters.Add("@finalprice", OleDbType.Single).Value = 0.0;
og.Parameters.Add("@handle", OleDbType.VarWChar).Value = "admin";
og.Parameters.Add("@ischeckout", OleDbType.SmallInt).Value = 0;
og.Parameters.Add("@memo", OleDbType.VarWChar).Value = "";
og.Parameters.Add("@paymode", OleDbType.VarWChar).Value = "";
og.Parameters.Add("@trick", OleDbType.VarWChar).Value = "";
og.ExecuteScalar();
od.Close();
why the same code is not work? i'm find all MSDN ,but there is no answer
Who can help me,Thanks
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Nov 17, 2007
Hi-
VS 2008 supports targeting different versions of the .NET Framework. Will this apply to SSCE as well? I have some older apps that I want to keep in .NET 2 and SSCE 3.1. But I would also like to develop new stuff in 3.5. Will the targeting mechanism in VS 2008 support using SSCE 3.1 with .NET 2.0 and SSCE 3.5 with .NET 3.5?
Thanks.
-Gary
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Aug 5, 2007
I have been having "fun" trying to get all the bits (SSCE 3.5, Orcas Beta 2, SQL Managment Studio) in Vista 64 and Xp 32.
So far I have found at the SQLMetal does work with SSCE 3.5 but not in Vista64
BUT I cannot get any tool (tried SQL and SLQ express) to manage my SSCE db - ie make relationshipos so that SQLMatal can do its stuff
Any advice as to which tool to use to manage SSCE 3.5
Thanks
Mike
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Nov 22, 2007
Does anybody have the RTM build numbers for SQL Server Compact Edition 3.5?
Thanks
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Sep 20, 2007
Could y'all please clarify this statement with some examples:
"A SQL Server Client Access License (CAL) is required for any connection to SQL Server, including a connection from SQL Server Compact Edition."
Is this only referring to RDA, or is it referring to data replication by any means? Is there any restrictions for connections between SSCE devices?
Thanks!
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Apr 2, 2008
I've just recently downloaded Visual Studio 2008 Express which comes with SQL Server 2005 Express and SQL Server Compact 3.5, both of which were installed when I installed the products.
I've been following the tutorial videos and trying some stuff of my own and I just can't seem to get a Compact 3.5 database to actually update! I'm doing EXACTLY what is shown in the tutorials and th dataset is being updated - changes and added records - and they will show up in a DataGrid control as expected, but when I accept the changes - nothing is changed and/or added to the actual .sdf file. When I open it again, it's the same as it was before. Using exactly the same code but with an SQL Server 2005 Express database (.mdf), updates are fine.
First I created a dataset that connects to the SSCE 3.5 database .SDF file. Then I simply drag the table from the dataset to the form which creates Dataset, Table Binding Source, Table Adapter Manager and BindingNavigator items, in addition to the toolbar and DataGrid controls. The code generated from this is below. I have added the Try/Catch block and messages to see if any errors are ocurring.
Code Snippet
Public Class Form3
Private Sub TblMessageTypeBindingNavigatorSaveItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TblMessageTypeBindingNavigatorSaveItem.Click
Me.Validate()
Me.TblMessageTypeBindingSource.EndEdit()
Try
Me.TableAdapterManager.UpdateAll(Me.AppMessagesDataSet)
MsgBox("Changes Saved")
Catch ex As Exception
MsgBox(ex.ToString)
End Try
End Sub
Private Sub Form3_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'TODO: This line of code loads data into the 'AppMessagesDataSet.tblMessageType' table. You can move, or remove it, as needed.
Me.TblMessageTypeTableAdapter.Fill(Me.AppMessagesDataSet.tblMessageType)
End Sub
End Class
When I run the app, the data in the database table is displayed correctly. If I make a change and add a record then click the Save button, I get the expected "Changes Saved" message indicating that there are no errors. When I look a the contents of the table, the changes and additions did not happen and the data is exactly the way it was before.
I had the full SQL Serer 7.0 installed as well so I thought there might be a conflict or something became corrupted. In uninstalled SQL Server 7.0, SQL Server 2005 Express and SQL Server Compact 3.5. I "repaired" VB 2008 Express which reinstalled SQL Server Compact 3.5 and separately reinstalled SQL Server 2005 Express. Same problem.
As I mentioned above, what gets me is that if I use the same setup for a SQL Server 2005 Express database, changes and inserts work just fine. (Used the Northwind.mdf (Express) and the Northwind.sdf (Compact) sample databases and created my own sample .mdf and .sdf databases - same results.)
I've looked at whatever I can to see if I can find the problem but just can't put my finger on it. Very frustrating.
Does anyone have any advice on what I might be doing wrong with Compact or if there is something I've missed or if there's a property somewhere that needs to be set, or perhaps a configuration issue??
Many thanks,
Ben
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Nov 20, 2007
I just installed VS2008 RTM and noticed that it really wants me to use 3.5 instead of 3.1. As I am doing most of my SSCE work through the SQL Server 2005 Management Studio (its query editor is still far superior to VS'), I found that I can still use 3.1 without much trouble (so long as I manually browse and add the 3.1 reference to my project).
That said, I'd like to use 3.5. My two questions are:
- Is the SSCE 3.5 version included in VS2008 final? I noticed the dlls are all over a month old. Can I redistribute these with my app?
- Will there be support in SQL 2005 or SQL 2008 for connecting to 3.5 databases? I know that a new SQL server 2008 CTP was released, but haven't seen mention of SSCE support. I'd really hate to lose the great query editor of the Management Studio when moving to 3.5.
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Dec 11, 2007
Howdy folks,
I may have stumbled upon the most obscure bug imaginable. I was noticing my parameterized queries were failing on our SBC (WinCE5 x86), but not on our WinCE5 x86 emulator, WinXP setup, or WinCE5 ARMIV emulator. After much grief, I discovered the source of the problem had to do with a call to ICommandWithParameters::GetParameterInfo().
On all platforms other than our SBC, the DBPARAMINFO::ulParamSize was (correctly) retrieved as 16B for type DBTYPE_DBTIMESTAMP. On the SBC this value was retrieved as 8B. Now I know that natively all platforms of SSCE store a datetime object in 8B, but a DBTIMESTAMP structure (16B) is what's always used to transfer those fields to and from the database. Needless to say, with the wrong ulParamSize being returned, my data buffer (which used DBTIMESTAMP's) was being overwritten.
The erroneous value can be seen in this image
Just to further the case that this is a bug, the column size of a datetime field is correctly retrieved as 16B on the same platform when GetColumnInfo is run, as shown here.
Do y'all have any insight in this matter?
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Jun 22, 2007
Does SSCE 2005 work in Windows 98 ??? If yes, How do I deploy my aplication with SSCE 2005 in Windows 98 ???
Thanks every one,
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Dec 6, 2006
We have plan to migrate our database from Access to SqlCe.
Here our situation:
We will never use a Pocket PC applications, only Windows desktop application.
We want to migrate the .mdb file to a .sdf file (I've seen the ADS application, but since we don't use mobile devices, it's no use)
The .sdf will be use on local client machine only.
Here's my problems:
I've use a conversion to migrate from access (http://www.primeworks-mobile.com/Downloads/DPW.html) and seem to work fine.
I updated the source code to use the SqlServerCe dll instead of OleDB.
Some of my queries work fine, but others just won't work in VS2005 using C#.
To check if the query is really wrong, I take exactly the same query and put it Query Builder from the Server Explorer in VS2005.
And the query just work fines!!! It's bring back all the records asked for, and I've got an error for the same query from my source code.
I'm using a datatable, here's the code used for filling the DataTable. I've got an error on the line adapter.FillSchema()
string connectionString = @"Data Source=" + fic_parent.CheminFichierComplet;
using (SqlCeConnection connection = new SqlCeConnection(connectionString))
{
SqlCeDataAdapter adapter = new SqlCeDataAdapter();
connection.Open();
SqlCeCommand command = new SqlCeCommand(requete, connection);
command.CommandType = CommandType.TableDirect;
adapter.SelectCommand = command;
tableResultats = new DataTable();
adapter.FillSchema(tableResultats, SchemaType.Source);
adapter.Fill(tableResultats);
// Close connection
connection.Close();
}
Error is:
Message="The specified table does not exist. [ (...) ]"
Source="SQL Server 2005 Everywhere Edition ADO.NET Data Provider"
HResult=-2147217865
NativeError=0
Here my questions:
Is it possible to have an application that will convert my Access databases to an SSCe .sdf file ?
Why I can query in Server Explorer and can't in my source code using the same sql statement ?
At which level my code isn't good, because I just replace all OleDB* --> SqlCe* in my code.
I hope that I explain clearly my problem, do not hesitate to ask me questions about this problem.
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Aug 3, 2007
I'm running VS2008 beta2. I've succefully added a SDF database file to my project and created a couple of tables in it from VS. I added a reference to the System.Data.SqlCeConnection. When I try to create a new instance of the SqlCeConnection class I get a nasty error that states I'm missing the 'sqlceme35.dll' file. I copy all of the files .dll into by bin folder. Now I'm getting a BadImageFormat error when I create an instance. Does anyone know what that means? or why I had to copy those files to begin with? This is very odd. Any help would be appreciated. I am new to SqlCe.
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Feb 7, 2008
I don't know if it is by design or a bug. I have tried using the TableAdapterManager with remote SQL 2005, SQL 2005 Express (local and remote) with success.
I have tried using the TableAdapterManager ,( which is included by default with the dataset), with SQL Compact 3.5 as a local (within project) and remote(not in the project) and it does not work.
I would think that if the intention is to start using SCE 3.5 as the local database for applications (which makes sense), then I would think that making use of the TableAdapterManager class would seem to be a no brainer unless I'm missing something. I've been known to do that.
I guess my question is, is this a bug or by design?
Any comments would be appreciated.
Shane
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Apr 24, 2007
Hi,
I've found a two different answers for this question:
one - on the http://support.microsoft.com/Default.aspx?kbid=920700 site where on the Performance improvements section there is a 128MB value in the Database size.
other is in the product datasheet there is a information that this version supports databases up to 4 GB.
Could you tell me what is the correct answer?
Regards,
Mariouche
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Mar 11, 2008
What tool should I use to view SQL Server Compact Edition database?
I have VS2008 Professional, but I didn't find any tool in the installation. So I tried to install the SQL Server Developer Edition, which is included in the VS2008 package, but the installation has quit saying the that there is nothing to upgrade (there is probably newer version of SQL installed by VS2008 itself).
I also tried to download and install SQL Server Managment Studio Express. The installation went well, but then I wasn't able to select any SSCE database (there was only SQL Server Express or something like that selectable).
Is there anything else I should do?
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Oct 4, 2007
Hi all,
I just want to know if SSCE 3.0/3.5 can cater for Multi-user instances? I have a desktop application that I want to allow multiple Windows-user accounts to access. basically I need a datastore that can be lightweight (which SSCE is) and support "User Instances" (like in SQL Server Express)
thanx!
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