... Explorer-that's the best way to
learn.
Once you've connected to the database, you can view things such as the tables. You can
also retrieve and modify rows in the tables. You can drill ... clicking the Show Diagram button in the
toolbar and selecting columns from the table, as shown in Figure 3.29
. As you can see,
I've selected the ContactName, CompanyName, and CustomerID columns ... the tables in the
database by clicking the Add icon in the tree in Server Explorer, and you can retrieve the
rows from a table by clicking the right mouse button on the table in the tree and...
...
Creating a Command Object UsingVisualStudio .NET
To create a SqlCommand object usingVisualStudio .NET (VS .NET) , you drag a
SqlCommand object from the Data tab of the Toolbox ... named MyDataReader containing a Windows application.
2. Add a SqlConnection object to your project (refer back to the previous chapter
to
see how to add a SqlConnection object using VS .NET) . ... can also drag an
OleDbCommand object from the Data tab of the Toolbox to your form.
Before you perform the procedure explained in this section, do the following:
1. Create a new project named...
...
Creating a Connection Object UsingVisualStudio .NET
To create a SqlConnection object usingVisualStudio .NET, you drag a SqlConnection
object from the Data tab of the Toolbox ... You'll recall that a SqlConnection
object allows you to connect to a SQL Server database. You can also drag an
OleDbConnection object from the Toolbox to your form to connect to a database ... correct.
At this point, you've entered all the mandatory details, and you can choose to save your
details by clicking OK, or you can click Advanced to enter additional details such as the...
... â Start
Without Debugging. Figure 9.4
shows the running form.
Figure 9.4: The running form
Using a DataReader Object in VisualStudio .NET
You can't visually create a DataReader ... DataReader object in VisualStudio .NET (VS .NET) ; you can
only create them using program statements.
In this section, you'll see how to create a SqlDataReader object and use it to retrieve ... from a SqlCommand object, which you saw how to create using VS .NET in the
previous chapter
. That SqlCommand object contained a SELECT statement that retrieved
the CustomerID, CompanyName, and...
... ngh a cho ta biết về dữ kiện. Thí dụ XML
Schema c a một XML file là metadata cắt ngh a về data structure c a
data trong XML file. Chính cái XML Schema cũng là một XML file. Các
.NET application ... .NET 27
Dim AppPath As String
Dim Pos As Integer
' Fetch full pathname of the EXE file
AppPath = System.Reflection.Assembly.GetExecutingAssembly.Location
' Locate the last slash ... thử
một program Demo .
Các bài tập Microsoft .NET 2
Bài 1
Microsoft .NET Framework
Cài đặt Visual Studio. NET Beta 2
Visual Studio. NET nằm trong 3 CDs, gồm có 4 files:
•
EN_VS _NET_ BETA2_WINCUP.exe
•...
... Microsoft .NET 13
Bài 2
Visual Studio. NET
Visual Studio. NET
Để chạy VisualStudio .NET bạn cần phải Set Time c a Windows lại trước
cuối tháng 7,2001, eg: 1-July-2001.
Visual Studio. NET Beta 2 hiện nay ... trình. Sau đó ta có thể viết:
AppPath = VB6.Left(AppPath, Pos)
Nguyên program chúng ta tại đây là Public Class Form1. Form1 th a kế
standard form class c a .NET Framework nên ta declare:
Inherits ... ' Read the list of animals from a text file into Listbox2
Dim sr As StreamReader
Dim Pos As Integer
Dim TStr As String
ListBox2.Items.Clear() ' Clear Listbox2
' Use a StreamReader...
... View tab uses a CrystalReportViewer object on the tab page.
Steps
Open and run the Visual Basic .NET- Chapter 10 solution. Click on the button labeled
How-To 10.4. Clicking on the tabs, you can ... data has been
exported. The last tab, View, displays the report in a Viewer.
1. Create a Windows Form. Then place a Tab control on your form.
2. Add pages for Print, Export, and View, using ... or Exported
Using Visual Basic .NET Code
I know I can use the Crystal Report Viewer to print and export my reports, but I want to
be able to have control over that, and maybe not even include...
... loại cache database nho nhỏ (gọi là disconnected database) để
thay thế ADO. Thay vì application connects vĩnh viễn với database mẹ qua ADO,
application trong .NET làm việc với portable database ... từ database mẹ. Khi nào cần, portable database nầy (ADO .NET) sẽ được
reconciled với database mẹ để update các thay đổi. Hai tables trong ADO .NET có
thể được related nhau trong Master/Details ... relationship. Vì ADO .NET có
ch a original data lẫn data mới nhất nên Rollback trong ADO .NET rất dễ dàng
và nhẹ ký.
XML được yểm trợ tối a. Nằm ph a sau ADO .NET là XML. XML có thể là Table...
... kế ta có thể edit các List items c a một Listbox bằng cách mở
property Items Collection ra và Edit vào một trang.
Bài 2
Visual Studio. NET
Visual Studio. NET
Để chạy VisualStudio .NET bạn ... c a tên project trên
trang StartPage, hay dùng Menu command File | Open | Project , hay Menu
Command File | Recent Projects.
Visual Studio. NET IDE
Trong program Sở thú Saigon nầy ta có hai ... Object, ByVal e As
System.EventArgs) Handles Timer1.Tick
' Display Date and Time every half a second
Label3.Text = DateTime.Now.ToLongDateString & " " &
DateTime.Now.ToLongTimeString...
... different
ways.
An interface cannot exist as an object: It has no code and no place to store object data. A
class that implements an interface has an explicit contract with the interface: The class ...
You can also create properties that accept a parameter. For example, in the Northwind
database, a customer might have many orders. A parameterized property would be a
perfect way to access ... 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)...