... Site
!
Retrieving Data from a Database
!
Lab 1.1: Retrieving Data from a Database
!
Demonstration: Creating a Details Results Page
!
Lab 1.2: Creating a Details Results Page
!
Review
Data- driven Web ... display data on
Web pages and create a Web database application.
In order to use the information in adatabase on your pages, you need to create a
database connection. FrontPage helps you establish ... the
database to the current Web and establishing a connection with adatabase by
using the Database Results Wizard. The procedure for displaying data from a
database by specifying the rows and...
... interop.
While the data can be loaded intoa DataSet in this way, there is no way to reconcile the
changes made to the data in the DataSet with the data source underlying the ADO object.
This ... DataTable dt = new DataTable("Orders");
(new OleDbDataAdapter( )).Fill(dt, rs);
conn.Close( );
// Bind the default view of the dt to the grid.
dataGrid.DataSource = dt.DefaultView; ... dt.DefaultView;
Discussion
One of the overloads of the OLE DB .NET DataAdapter.Fill( ) method accepts an ADO
Recordset or Record object. The COM component that returns an ADO Recordset or
Record object...
... Fatema Hasan
Mahatma Gandhi Mission’s Medical College, Aurangabad, Maharastra, India, 431003
Correspondence to: Hunaid Hasan or Tasneem Fatema Hasan, “Ezzi Manzil”, CTS No. 3910, Near Bombay Mercantile ... 3910, Near Bombay Mercantile
Bank, Beside Amodi Complex, City Chowk, Juna Bazaar, Aurangabad, Maharashtra, India 431001. Email:
hunaidhasan@hotmail.com or zainabhasan52@hotmail.com. Phone: +91-240-234-8673/ ... Medicine, Mahatma Gandhi Mission’s
Medical College)
ã Dr. Ashfaque Ansari (Lecturer, Ear Nose Throat,
Mahatma Gandhi Missions Medical College)
ã Ms. Maria Boulanger (Manager, Regulatory Op-
erations,...
...
string expression.
Add the DataColumn to the parent DataTable.
Generate a DataTable from a DataView Create the original DataTable.
Create a new DataView instance, passing the DataTable
object to ... the DataRowView instance.
Creating a
DataView
To create a DataView from a DataTable, pass the table to the DataView constructor.
C#
DataView someView = new DataView(someTable);
Visual Basic
Dim ... in a DataTable.
Note
The DataView does not actually reference a set of DataRow instances; instead, it refers
to a set of DataRowView instances. ADO.NET uses the DataRowView class to manage...
... Startup group.
Summary
As popular open-source applications, MySQL, Apache, and PHP are available
for a wide variety of platforms and architectures, in both binary and source form.
This chapter ... controls installed by Apache on the Start menu to control
the Apache server. To start MySQL and Apache automatically on Windows, simply
add a link to the mysqld.exe and apache.exe server binaries ... control script:
[root@host]# /usr/local/apache/bin/apachectl start
[root@host]# /usr/local/apache/bin/apachectl stop
To have MySQL and Apache start automatically at boot time on UNIX, simply
invoke...
... // Sample data that might come from adatabase
// displayed according to culture set by user.
dateLabel.Text = DateTime.Now.ToString("D");
shortDateLabel.Text = DateTime.Now.ToString("d"); ... variables, and constants
using System;
using System.Threading;
using System.Globalization;
using System .Data;
using System .Data. SqlClient;
// This value would normally be retrieved from a ... client rather
than the server.
Solution
Use client culture and encoding to return data to the client formatted according to the
client's localization settings rather than the server's...
... required tasks:
1. Create a web page that outputs a binary stream containing the image from the
database.
2. Create a SQL statement to retrieve the required image from the database and
retrieve ... display an image from adatabase column in an ASP.NET control.
Solution
Fill an ASP.NET Image control from adatabase field by pointing the ImageUrl property
of an Image control to a web page ... the image using a DataReader. A DataTable or DataSet filled using a
DataAdapter can also be used.
3. Set the ContentType property of the HttpResponse object to the MIME type of the
image in...
... System .Data;
using System .Data. SqlClient;
private DataSet ds;
private SqlDataAdapter da;
private BindingManagerBase bm;
// . . .
private void DisplayDatabaseImageForm_Load(object ... display an image from adatabase in a Windows Forms control.
Solution
Read the image intoa byte array and load it directly intoa PictureBox control with a
MemoryStream.
The sample code contains ... handlers:
Form.Load
Sets up the sample by filling a DataTable within a DataSet with the Employees
table from the Northwind sample database. The EmployeeID, LastName, and
FirstName fields are...
... Basic ApplicationASP Page Other Applications
OLE DB
ADO
ODBC
Simple Data Provider
Mainframe
Data
Non
Relational
Data
A database is a collection of data stored in a tabular form. Adatabase ...
Exercise 3
Accessing data from adatabase
In this exercise, you will create an ASP file to access data from a database.
!
Access data from adatabase
1. Open a new page.
2. Use the ... as
a Web page that appears in their browser.
Note that in this example, data is accessed from adatabase to display to the
user. However, you can also write data to a database. Database- access...
... push changes made in a DataSet to the database in Chapter
11.
You can drag a table from a SQL Server database onto your form and have the
SqlConnection and SqlDataAdapter objects created in one ... create a DataSet object. You use a DataSet object to a store local copy
of the information stored in the database. A DataSet object can represent database
structures such as tables, rows, and ... with a DataGrid
Next, you'll add a SqlConnection object and a SqlDataAdapter object to your form.
Note You use a SqlConnection object to connect to a SQL Server database, and a
SqlDataAdapter...
... Design Databases course description.
Overview of Data Modeling and Database Design 8Ć9
Database Design
Designing a relational database system involves converting a model intoa workable
software ... define basic types of data relationships.
D
Define a relational database and its components.
D
Read an entity relationship model.
D
Translate an entity relationship model intoa relational database ... identifier.
Third normal form (3NF) No non-UID attribute can be dependent upon
another non-UID attribute.
Overview of Data Modeling and Database Design 8Ć29
Designing the Database
The database design stage produces...
...
applications that are typically used in Internet applications, such as automatic
registration of users, and creating and managing e-mail accounts. You can also
install CDO for Exchange Management ... Transport Protocol (NNTP), and
use standardized data- access formats, such as OLE DB and ActiveX
đ
Data
Objects (ADO). By using CDO, you can build complete messaging, calendar,
and contact ... from a Calendar folder are as follows:
1. Open the Calendar folder by using an ADO database (ADODB) record.
2. Open an ADODB Recordset containing the items in the Calendar folder.
3. Use a SELECT...
... 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 ... 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...
... it again. The DataSet in this case
is referred to as a disconnected DataSet as it doesn't maintain an active connection to the
database. Disconnected DataSet objects act as adata cache ... time. Instead, a better approach is to connect to the database, fetch the datainto
a DataSet object, and then disconnect again. The user can browse the data in the DataSet
and make any changes ... in applications. You can
modify the data in the DataSet, and later reopen the connection and send the changes
back to the database.
You can manually open a connection to adatabase by creating...