... Selection Query with Visual C#. NET
B. Next we need to check whether a valid database is still connected to our project, in other
words, a connection between our project and our database is still ... Selection Query with Visual C#. NET
B. A typical LINQ query structure is created and executed to retrieve back all related infor-
mation for the selected faculty member. The facu...
... infor-
mation related to the student_id. The scinfo is a Visual C# 2008 implicitly typed local
variable with a data type var, and the Visual C# 2008 can automatically convert this var
to any suitable ... to remove this watermark.
344
Chapter 5 Data Selection Query with Visual C#. NET
5.19 QUERY DATA USING RUNTIME OBJECTS TO
SQL SERVER DATABASE
In the previous section you...
... Selection Query with Visual C#. NET
C. If the user selected the fi rst method, LINQ to SQL method, a standard LINQ query
structure is adopted with an implicit typed local variable f_info with a data ... infor-
mation for the selected faculty member. The facultyinfo is a Visual C# 2008 implicitly typed
local variable with a data type var. The C# 2008 will be able to automatic...
... cations on that duplicated project,
in Visual C#. NET, this duplication is not as easy as that in Visual Basic.NET. The main
issue is that in Visual C#. NET, the namespace is widely used to provide ... do with adding a new
record into a data table in the database. The data tables in the DataSet are only mappings
of those real data tables in the database. To add this new record...
... watermark.
494
Chapter 6 Data Inserting with Visual C#. NET
table in the database and should be read back and displayed in the form window. Let ’ s
begin with the coding for the fi rst step.
6.6.3 ... Server database and the
Oracle database, all the codes we developed in the last section can be used to access the
Oracle database to perform data insertion. The only differen...
... Updating and Deleting with Visual C#. NET
7.7 UPDATE AND DELETE DATA FOR ORACLE DATABASES
USING RUNTIME OBJECTS
Because of the coding similarity between the SQL Server and the Oracle databases for ... and Deleting with Visual C#. NET
sary to update the primary key, or the
faculty_id
, in our Faculty table if we want to
update any faculty information from the Faculty table in t...
... Server database is shown in Figure 7.48 . Please
develop a piece of code in
Visual C#. NET to call this stored procedure to update a record in
the database.
2. A piece of code developed in Visual ... Server database, in this chapter we
only use the SQL Server database and the Oracle database as our target databases to
illustrate how to select, display, and manipulate data a...
... Change the query string from the SQL Server database to the Oracle database. The Oracle
database assignment operator =: is used to replace the SQL Server database assignment
operator LIKE @.
... table has some relationships with other tables such as LogIn and the Course; that
is, the Faculty table has some relationships with all four tables in our sample database,
which inclu...
... Services such as
the C# Web Services, Java Web Services, and Perl Web Services. In this section we only
concentrate on developing the ASP.NET Web Services using the Visual C#. NET 2008.
Before ... when we created our sample database in Chapter 2 , we do not need
any login ID and password for the database connection in our application. One important
issue is the database we are...