... problematic if the calling program is written in Visual Basic. The .NET
Framework attempts to solve this by compiling additional data into all assemblies.
This additional data is called metadata and ... changes from Visual Basic to
Visual Basic. NET (VB .NET) . Most of the book assumes that you are comfortable
with Visual Basic 6.0 (VB6), so the book endeavors to be a...
... simple database access, or
you are creating middle-tier components to handle database
access, understanding how to connect to a database, retrieve
information, and manipulate data are critical to ... 104
Database Access with
VB .NET and ADO .NET
The vast majority of applications today have to perform some
sort of database access. Whether you are building Windows
applications and...
... Employee.LoadFromDatabase(35);
emps[2] = Employee.LoadFromDatabase(255);
}
}
This allows us to create an instance and load it, and then save it into the array.
The reason that arrays aren’t ...
Jagged Arrays
A jagged array is merely an array of arrays and is called a “jagged” array because it doesn’t have to be
square. For example:
int[][] matrix = new int[3][];
matrix[0]...
... Employee.LoadFromDatabase(35);
emps[2] = Employee.LoadFromDatabase(255);
}
}
This allows us to create an instance and load it, and then save it into the array.
The reason that arrays aren’t ... array
Jagged Arrays
A jagged array is merely an array of arrays and is called a “jagged” array because it doesn’t have to be
square. For example:
int[][] matrix = new int[3][];
matri...
... Employee.LoadFromDatabase(35);
emps[2] = Employee.LoadFromDatabase(255);
}
}
This allows us to create an instance and load it, and then save it into the array.
The reason that arrays aren’t ... array
Jagged Arrays
A jagged array is merely an array of arrays and is called a “jagged” array because it doesn’t have to be
square. For example:
int[][] matrix = new int[3][];
matri...
... Sql data adapters, you can use OleDb, ODBC, and other data
adapters easily. The SqlDataAdapter, OleDbDataAdapter, and OdbcDataAdaper
classes represent data adapter components in Sql, OleDb, and ... component of a data provider. Similar to the
connection, each data provider has a corresponding data adapter class. All
data adapters in ADO .NET work in the same way, which means if you kno...
... a Visual Basic .NET Desktop Application
Another useful utility that takes advantage of being data driven is a standard search form
that you can use for any number of tables, such as customers, ... btnZ
Caption Z
Button Name btnAll
Caption All
DataGrid Name dgSearch
Button Name btnAccept
Caption &Accept
Button Name btnCancel
Caption &Cancel
5. Create the custom...
... after a variable name to declare it as an array
variable, but then it only applies to this variable.
An array variable that is declared as a member of a class, but is not initialized to
any array, ... a call to the
toCharArray()
method of the
String
class:
"AHA".toCharArray()[1]
.
The array operator
[]
is used to declare array types (
Topping[]
), specify arr...
... Sams Teach Yourself More Visual Basic .NET in 21 Days
Welcome to Visual Basic .NET
With the release of Visual Basic .NET, you can use even more functions, features, and
tools when creating an ... performing
some basic functions, or adding new functionality to an application. Visual Basic .NET
has even more neat stuff that makes it even easier to enhance your applica...
... Define a Class in Visual Basic .NET
Before writing code, you should take a moment to decide what data the class needs to
contain and what actions a developer (whether it is you or a teammate) ... Boolean
Function Delete() As Boolean
#End Region
As I mentioned in the introduction to this chapter, one of the great advantages to
wrapping up all access to a databa...