1. E-commerce Applications Development 0731465
Done by Raneem Qaddoura

2. Lecture 1 Ado.net

3. Accessing a Database from an ASP Page
Create an ADO connection to a database
Open the database connection
Create an ADO recordset
Open the recordset
Extract the data you need from the recordset
Close the recordset
Close the connection

4. Configuring Your Database
SQL Server Express
Free data engine
Download from
Browsing and Modifying Databases in Visual Studio
Choose View ➤ Server Explorer
Use the Data Connections node in the Server Explorer to connect to existing databases or create new ones
Server name: localhost\SQLEXPRESS
ADO.Net
Storing the Connection String
Making the Connection
Manipulate data using recordset

5. Storing the Connection String
Web.config:
<configuration>
<connectionStrings>
<add name="Pubs" connectionString="Server=localhost\SQLEXPRESS;Database=master;Trusted_Connection=True;"/>
</connectionStrings>
</configuration>

6. Making the Connection Asp.cs: using System.Web.Configuration;
using System.Data.SqlClient;
// Define the ADO.NET Connection object.
string connectionString = WebConfigurationManager.ConnectionStrings["Pubs"].ConnectionString;
SqlConnection myConnection = new SqlConnection(connectionString);
try {
// Try to open the connection.
myConnection.Open();
lblStatus.Text = "Connected Succssfully";
} catch (Exception err) {
// Handle an error by displaying the information.
lblStatus.Text = err.Message;
} finally {
// Either way, make sure the connection is properly closed.
myConnection.Close(); }

7. Example - Select <form id="form1" runat="server"> <div>
<asp:DropDownList ID="lstStudents" runat="server" />
<asp:Label ID="lblResults" runat="server" />
</div>
</form>

8. Example - Select
protected void Page_Load(object sender, EventArgs e) {
if (!this.IsPostBack) {
lstStudents.Items.Clear();
string selectSQL = "SELECT ID, sname, phone, hours FROM Student";
string connectionString = WebConfigurationManager.ConnectionStrings["Pubs"].ConnectionString;
SqlConnection con = new SqlConnection(connectionString);
SqlCommand cmd = new SqlCommand(selectSQL, con);
SqlDataReader reader;
try {
con.Open();
reader = cmd.ExecuteReader();
while (reader.Read()) {
ListItem newItem = new ListItem();
newItem.Text = reader["sname"].ToString();
newItem.Value = reader["ID"].ToString();
lstStudents.Items.Add(newItem); }
reader.Close();
catch (Exception err) {lblResults.Text = err.Message;}
finally { con.Close(); }

9. Example - Insert <form id="form1" runat="server"> <div>
<asp:Label ID="lblID" runat="server" Text="ID "></asp:Label>
<asp:TextBox ID="txtID" runat="server"></asp:TextBox><br />
<asp:Label ID="ibiName" runat="server" Text="Name "></asp:Label>
<asp:TextBox ID="txtName" runat="server"></asp:TextBox><br />
<asp:Label ID="lblPhone" runat="server" Text="Phone "></asp:Label>
<asp:TextBox ID="txtPhone" runat="server"></asp:TextBox><br />
<asp:Label ID="lblHours" runat="server" Text="Hours "></asp:Label>
<asp:TextBox ID="txtHours" runat="server"></asp:TextBox><br />
<asp:Button ID="btnAdd" runat="server" Text="Add" OnClick="btnAdd_Click" /><br />
<asp:Label ID="lblStatus" runat="server" Text=""></asp:Label>
</div>
</form>

10. Example - Insert
protected void btnAdd_Click(object sender, EventArgs e){
string insertSQL;
insertSQL = "INSERT INTO Student ";
insertSQL += "VALUES ('";
insertSQL += txtID.Text + "', '";
insertSQL += txtName.Text + "', '";
insertSQL += txtPhone.Text + "', '";
insertSQL += txtHours.Text + "')";
string connectionString = WebConfigurationManager.ConnectionStrings["Pubs"].ConnectionString;
SqlConnection con = new SqlConnection(connectionString);
SqlCommand cmd = new SqlCommand(insertSQL, con);
// Try to open the database and execute the update.
int added = 0;
try {
con.Open();
added = cmd.ExecuteNonQuery();
lblStatus.Text = added.ToString() + " records inserted."; }
catch (Exception err) {lblStatus.Text = err.Message;}
finally {con.Close();}

11. Example-Update
How Can we update a record???

12. Example-Delete
How Can we delete a record???

13. References
Beginning, A. S. P. (2007). .NET 3.5 in C# 2008: From Novice to Professional , M. MacDonald, Apress.

14. The End