DataSource Controls :: How To Work With Oracle And SQL Server Using EF4?
May 18, 2010
We are working in a new N-Layered application with EF4 as ORM. As a requirement, we need to give support for both SQL Server and Oracle existing databases.
Our wish was to build a single EDMX model and then generate our business entities from a TT file.
The main problem was that database providers may generate different .NET types from our database field types. In this case, we'll have different EDMX models and then different auto-generated entities, which is more or less the same as have two different applications.
I don't know if we could have different SSDL files with specific database information (one for Oracle and another one for SQL Server) in separete files and share CDSL and MSL information for both databases.
Would be this solution possible?
Someone knows some other way to work with Oracle and SQL Server using EF4?
Is there anything special to do with Windows 2008 R2 Server and Visual Studio 2010 to get Oracle quereis to work? I have the same DB Connnection.string I have used before and it works. I am at a loss here.
I have a sql server query that has connection in Default.aspx page. I have the page works perfectly when i browse from server, but when i try to access through it remotely from my machine. i get error.
i asume this would be security , but i am using windows security.
May I know in SQL Server, what is the similar syntax for %TYPE in Oracle, i.e. the variable defined will follow the data type defined in the database column?
I have a website in which code on the production server runs no problem. The same code on my local machine or test server produces the mess seen at the end. The exact same code. Additionally, upon trying to preview any of the table adapters in the dataset I get "DataSet1.thename could not be previewed. The provider is not compatible with the version of Oracle client"
The app is SQL Server. It always has been. It has never used Oracle. Does anyone have any insight on how to fix this? As it is now I can't do anything with my dataset. I can't edit anything in there because of this complaint about Oracle.
For some reason the select parameter pAddId is getting set to null and get the following error when the content page is loaded If I hard code the value it works RA-01036: illegal variable name/number Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: Oracle.DataAccess.Client.OracleException: ORA-01036: illegal variable name/number
We are building an ASP.NET application with C#.net language and Oracle 9i database. Here we installed Oracle 9i client software on our PCs.We never worked on Oracle 9i database. It's the first time.We are planning to build stored procedures in Oracle database and call them from our ASP.NET application. Does working with Oracle stored procedures and ASP.NET is similar to that of working with MS SQL Server stored procedures and ASP.NET?
I was wandering if I can make this faster. I am taking records out of Oracle and putting them into a SQL Server. btw, I am inserting into the Identity column
We have a site that is runnig II7 64 bit with the oracle .net 64 bit provider, when I try and open this in web developer 2010 express (I'm running windows 7 pro 64bit) it says it can't load the oracle dll as its an incorrect format. I got the impress that web developer 2010 was 64bit capable.
Ofcourse this is extremly annoying as I don't get any syntax formatting for the project or intellisense.
how to implement requiredfieldvalidtor. Server control which i have created does not work on client side. No javascript is been rendered and onSubmit the page.isvalid returns true.
sql update command. I have created two forms for update,
1. In first one I retrieve details in text boxes vai id entered by user.
2. In second one I display a grid and on the EDIT hyperlink I pass on the value of the primary key to another update page with same syntax as first one. When I click on update button on this next page, I get a successful update message but the data in the database is not updated. Also I don't get any kind of error.
What is going wrong with the code?
Here is the code for the update page in second situation.. BTW I am displaying the details in a datagrid.
I'm trying to get an IDENTITY column to auto-increment with each new row inserted, so that the field (userid in this case) can be used as a unique identifier.
However, I'm getting this error:
[Code]....
My code looks like this:
[Code]....
I don't understand - if I have to explicitly insert something into my auto-increment column, how do I know what to insert? Isn't the point of an auto-increment column that it's... auto?
I code to exec a store procedre (sp_truncate) to truncate 10tables and using sqlBulkCopy to download a huge data. Both them are working fine.Now I want to use transaction with application (not in store procedure) torollback truncate tables if download is failed.Is it possible to use transaction to work with these two steps?
For example, many programmers prefer CAST over CONVERT because CAST is compliant with the ANSI SQL-99 standard. Does this mean if I used sql 92 compatible functions, it will work with other RDBMS such as MYSQL?
My users have "demanded" to have an export function to their gridviews, and since they're running from usercontrols there's no way to modify the response stream. My workaround is to create an aspx to run in a hidden iframe. To do that, and to make it modular, I'm trying to dynamically create everything from the querystring. This *seems* to work just fine until I bind my sqldatasource to the dummy gridview. I then get "Procedure or function 'xxx' expects parameter '@NumberResults', which was not supplied."
I been trying to get my Visual Studio 2008 to run my Web Application on IIS7 on my Windows 7 machine but I just can't get it to work. I'm using the SQLEXPRESS I been following this Tutorial, but I get the following error message.
"Failed to generate a user instance of SQL Server due to failure in retrieving the user's local application data path. make sure the user has a local user profile on the computer. The connection will be closed."
my table i have a column named [Name] nvarchar(255)[Name] can be a string witch can have some diacritics like "Ăă, Ââ, Îî, Țț, Șș"If i am using this, it returns for word "Antichități" the string "Antichitați"
[Code]....
But if i am trying to replace "È›" with "t", it doesn't work
[Code]....
The result is still "Antichități"How can i resolve this issue?
I have a table that could look like the left table in the following picture, but i want to present it as the right table in the picture. http://pici.se/549963/?size=fullsize
So i've found out that i could use pivots to do this, but am having some trouble getting it to work, so if you know how to do this.
I've never used the RetrieveData() function and I don't know much about it.Having failed to work it out myself could someone show me some examples of how I call this method?Here's what I know about it: 1.It hadles the work of contacting the database and creating the DataSet.2. You must import System.Data, System.Data.SqlClient and System.Web.Configuration namespaces in teh web page.3. It can be called in any event handler in the web page code.I've tried typing this method in my page_Load() but I get the squiggly red underline which indicates that it doesn't recognise this method.
