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reg.NavigateUrl = "~\Secure\NewUser.aspx" Else reg.NavigateUrl = _register End If If (Context.User.Identity.IsAuthenticated) Then reg.Text = "Edit my profile" Else reg.Text = "Register" End If ' Add the newly created link to our ' collection of child controls Controls.AddAt(0, reg) ' Add a couple of blank spaces and a separator character Controls.Add(New LiteralControl(" - ")) ' Add a label with the current data lbl = New Label lbl.Text = DateTime.Now.ToLongDateString() Controls.Add(lbl) End Sub 2. If you have not already done so, set the Default.aspx page to inherit the FriendsBase class and, from the page Design view, delete all the existing controls except the placeholder. Also, modify the introduction line for the page to something like Welcome to the Friends Reunion application. Select the desired link to access the functionality on the site:. 3. If you recompile the project after making just these changes, and then reopen the Default.aspx page (you may need to log in again), you ll see the page shown in Figure 4-6. 4. Now modify the Page_Load() handler in the NewUser.aspx page to preload the form with a registered user s data: ... Imports System.Data.SqlTypes ... Private Sub Page_Load(ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles MyBase.Load MyBase.HeaderIconImageUrl = "~/Images/securekeys.gif" MyBase.HeaderMessage = "Registration Form"
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Figure 4-6. The Default page after modifications ' Postbacks will typically be caused by the validator ' controls in non-IE browsers If Page.IsPostBack Then Return ' If this is an update, preload the values If Context.User.Identity.IsAuthenticated Then ' Change the header message MyBase.HeaderMessage = "Update my profile" Dim con As New SqlConnection( _ "data source=.;initial catalog=FriendsData;" + _ "user id=apress;pwd=apress") Dim cmd As New SqlCommand( _ "SELECT * FROM [User] WHERE UserID=@ID", con) cmd.Parameters.Add("@ID", Page.User.Identity.Name) con.Open() Try Dim reader As SqlDataReader = cmd.ExecuteReader() If reader.Read() Then ' Retrieve a typed value using the column's ordinal position Dim pos As Integer = reader.GetOrdinal("Address") txtAddress.Text = reader.GetString(pos).ToString()
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' Avoid using the pos variable altogether, ' but get the typed value txtBirth.Text = reader.GetDateTime( _ reader.GetOrdinal("DateOfBirth")).ToShortDateString() ' Convert directly the untyped Object returned by the ' default property to a string txtEmail.Text = reader("Email").ToString() txtFName.Text = reader("FirstName").ToString() txtLName.Text = reader("LastName").ToString() txtLogin.Text = reader("Login").ToString() txtPhone.Text = reader("PhoneNumber").ToString() txtPwd.Text = reader("Password").ToString() ' Use SQL Server type to have additional features pos = reader.GetOrdinal("CellNumber") dim cel as SqlString = reader.GetSqlString(pos) If Not cel.IsNull Then txtMobile.Text = cel.Value End If Finally ' Ensure connection is ALWAYS closed con.Close() End Try End If End Sub 5. Test this code by compiling the project and refreshing the previous page. If you click the Edit my profile link, you ll see that the values are preloaded on the form, as shown in Figure 4-7. 6. Next, to organize the code, create a private method called InsertUser(), and move the code inside the If statement from the btnAccept_Click() handler to it: Private Sub InsertUser() ... End Sub 7. The code in the button Click event handler should now be as follows (you ll complete the If statement later): Private Sub btnAccept_Click(ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles btnAccept.Click If Page.IsValid Then Else lblMessage.Text = "Fix the following errors and retry:" End If End Sub
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Figure 4-7. Values are preloaded for editing a user profile. 8. With that in place, now create another new method, called UpdateUser(), to handle the update scenario. Inevitably, it s similar to the code for inserting new entries. Private Sub UpdateUser() Dim values As New ArrayList(10) ' Optional values without quotes as they can be the Null value Dim sql As String sql = "UPDATE (User) SET " + _ "Login='{0}', Password='{1}', FirstName='{2}', " + _ "LastName='{3}', PhoneNumber='{4}', Email='{5}', " + _ "Address={6}, CellNumber={7}, DateOfBirth={8} " + _ "WHERE UserID='{9}'" ' Add required values to replace values.Add(txtLogin.Text) values.Add(txtPwd.Text) values.Add(txtFName.Text)
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