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there are several options
- if you can take out the files from the database, you can set them in a directory and save the paths instead.
- if that's not an option, stream the file to a tmp directory and set the url to that path, when the session expires you delete the files used within that session (you'll need a good naming convention...)
hope this helps.
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You forgot the solution that doesnt require writing the data to disk, which the OP has now been given >3 times.
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I have a design problem here.
in the BIL there are some classes that represent business entities
each of this class is static. and they all have mostly the same (static) members :
- some info methods like give the pk for that entity
- perform some actions on it: search for that specific business entity.
- and so on
I want to enforce that some methods are implemented on each static class.
how can I do it ? note that interfaces don't work here since it is a static class
maybe the design is wrong here, better alternatives ?
<< Nearly all men can stand adversity, but if you want to test a man's character, give him power. >>
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No, unfortunately, static classes must derive from Object and nothing else, and neither interfaces or abstract classes can be static anyway.
It's hard to comment on your design without seeing the whole thing, but I would suggest that yes, to have static classes representing business entities is a bit of a strange design.
Again, it's hard to suggest alternatives without seeing everything you are trying to do, but a pretty standard way is to have a bunch of business objects that define your business entities, these can then be created 1 for each entity and store all the values, and can possibly inherit from a base entity object.
Simon
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Hi All
Iam Using the SqlConnection To Connect To Sql Server 2005
And the connecte is Done .
I wount to Connecte to Sql Server 2005 By Using OledbConnection Or ODBCConnection , My Quesion Is :
how I Can Connecte to Sql Server 2005 With OLedbConnection Or ODBCConnection ? and it is a Write Connect ?
Thanks For any body help me ![Rose | [Rose]](https://codeproject.freetls.fastly.net/script/Forums/Images/rose.gif)
Thaer
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Take a look here[^], It might help you.
Life is 5: 3 me, 1 you.
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Ok Thanks Mr Pedram Behroozi
iwount To Know Can I Use The ODBCConnection Or OledbConnection to Connecte to Sql Server 2005
Thaer
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I think so but OdbcConnection requires an ODBC driver for the database while OleDbConnection requires an OLEDB provider (it's suitable for MSAccess or Oracle). Why don't you use SqlConnection? It's more efficient when using SQL Server because there is no OLEDB provider in between.
Life is 5: 3 me, 1 you.
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Yes, you can use ODBCConnection to connect to a SQL Server database, however, you really should use SQlConnection, which is specifically written for SQL Server. ODBC connections are necessarily generic where as the SQL connection offers enhanced performance and capabilities specific to SQL Server.
only two letters away from being an asset
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OledbConnection is not For SQL
SqlConnection is for SQL, ODBCConnection is Fine, but i suggest you use ODBCConnection
Vuyiswa Maseko,
Sorrow is Better than Laughter, it may Sadden your Face, but It sharpens your Understanding
VB.NET/SQL7/2000/2005
http://vuyiswamb.007ihost.com
http://Ecadre.007ihost.com
vuyiswam@tshwane.gov.za
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Vuyiswa Maseko wrote: i suggest you use ODBCConnection
You mean SqlConnection don't you?
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Oops typo i meant that yes thanks
Vuyiswa Maseko,
Sorrow is Better than Laughter, it may Sadden your Face, but It sharpens your Understanding
VB.NET/SQL7/2000/2005
http://vuyiswamb.007ihost.com
http://Ecadre.007ihost.com
vuyiswam@tshwane.gov.za
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Yes u can use OLeDBConnection & ODBCConnection to connect with SQL 2005
but .Net provided SQLConnection class to reduce the overhead while connecting with SQL using OLeDB or ODBC
SQLConnection specifically built for SQL. So if you use SQLConnection it will save time and your application will be more efficient as compared if you ODBC or OLeDB
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The type or namespace name 'Windows' does not exist in the namespace ' System' (are you missing an assembly reference?
This is an error occured while i try to include system.windows.form namespace.
can anyone tell me why?
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Did you add System.Windows.Forms.dll in your references?
Life is 5: 3 me, 1 you.
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Add a reference to System.Windows.Forms. This might remove the error.
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Hi to all,
I've got a little problem with visual studio 2008.
When I create an inherited form the IDE crashes. I've tried it with C# and VB but the result is the same.
In particular, I created a winform with protected fields and methods (a lot of these with access to a DB) an then I added a new Winform extended the previous. When I've tried to visualize the designer the ide has crashed!
How can I do ?
Many Thanks!
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Had you previously done this with VS 2005?
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I think I've got found the problem. Infact, I've seen that implementing the load method of the form for accessing to a DB, designer crashes when is opened on the inherited form.
I didn't tried to implement the show method of the form class with the access to DB.
What do you think about?
Thanks to all !
Bye
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Hi all
I have a project in which I have to communicate with a serial port on a piece of hardware. The hardware connects to a router via a standard Ethernet cable and is assigned an IP address and the serial port has a port number of 49510.
What I am hoping to do is send a string such as "1;0;FF,30,30,00,A2,32,EF;;;" from a remote computer on the network, to the serial port and then to listen for a response. I think this needs to be in TCP/IP format however I'm just new to C# socket programming and not sure how to achieve the end result.
Can someone please let me know if I can achieve this by writing a client socket program that connects to a server which then routes the string to the hardware's IP address.
Any help would be greatly appreciated.
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Thanks Rob, sounds exactly like what I need, I'll look into it.
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