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Once the prefix is defined in the core configuration, you can begin to create administrator actions. These actions may appear in any controller; they only need to be named with the prefix included. Suppose you wanted to change the Edit and Add actions in your Posts controller to be accessible via an admin route. You would need to rename the actions in the controller to admin_edit and admin_add, respectively. The prefix is attached to the name of the action with an underscore. So, if the prefix were defined in the core configuration as superuser, then these Edit and Add actions would need to have the superuser prefix added to the name: function superuser_edit($id=null) { When some actions are changed to be accessed through the admin route, these actions views will need to be renamed as well. The view files need to be named to link with the corresponding actions. So, the admin_edit action will need its view file to be named admin_edit.ctp. These admin actions are not called in the URL with the underscore. For example, the Admin Edit action is not executed by typing this: http://localhost/blog/posts/admin_edit/16 but by using the admin prefix before the controller name: http://localhost/blog/admin/posts/edit/16 To restrict these admin routes, an authentication system must be built to check users against the database and grant them privileges. At least with this routing mechanism you can create the necessary paths to differentiate between administrators and front-end users.

When calling a method, you specify any required parameters in parentheses or use an empty set of parentheses if no parameters are required.

Dim con As New SqlConnection(connectionString) Dim cmd As New SqlCommand(insertSQL, con) ' Add the parameters. cmd.Parameters.AddWithValue("@au_id", txtID.Text) cmd.Parameters.AddWithValue("@au_fname", txtFirstName.Text) cmd.Parameters.AddWithValue("@au_lname", txtLastName.Text) cmd.Parameters.AddWithValue("@phone", txtPhone.Text) cmd.Parameters.AddWithValue("@address", txtAddress.Text) cmd.Parameters.AddWithValue("@city", txtCity.Text) cmd.Parameters.AddWithValue("@state", txtState.Text) cmd.Parameters.AddWithValue("@zip", txtZip.Text) cmd.Parameters.AddWithValue("@contract", Val(chkContract.Checked)) ' Try to open the database and execute the update. Dim added As Integer = 0 Try con.Open() added = cmd.ExecuteNonQuery() lblResults.Text = added.ToString() & " record inserted." Catch err As Exception lblResults.Text = "Error inserting record. " lblResults.Text &= err.Message Finally con.Close() End Try ' If the insert succeeded, refresh the author list. If added > 0 Then FillAuthorList() End If End Sub Now that the values have been moved out of the SQL command and to the Parameters collection, there s no way that a misplaced apostrophe or scrap of SQL can cause a problem.

on e-commerce websites weren t fueled by hard-core hacker knowledge but were made using simple SQL injection by modifying values in web pages or query strings.

The Bake script automates the process of building admin routes. When creating controllers or views with Bake and using the build interactively feature, you can enter options to build the actions and views with admin routing. In other words, simply tell Bake when it asks if you want admin routing what the admin prefix is, and it will not only build the typical CRUD actions and views but will do so with the admin prefix added to action names and view files.

When the user clicks the Update button, the information in the text boxes is applied to the database as follows:

Protected Sub cmdUpdate_Click(ByVal sender As Object, _ ByVal e As EventArgs) Handles cmdUpdate.Click ' Define ADO.NET objects. Dim updateSQL As String updateSQL = "UPDATE Authors SET " updateSQL &= "au_fname=@au_fname, au_lname=@au_lname, " updateSQL &= "phone=@phone, address=@address, city=@city, state=@state, " updateSQL &= "zip=@zip, contract=@contract " updateSQL &= "WHERE au_id=@au_id_original" Dim con As New SqlConnection(connectionString) Dim cmd As New SqlCommand(updateSQL, con) ' Add the parameters. cmd.Parameters.AddWithValue("@au_fname", txtFirstName.Text) cmd.Parameters.AddWithValue("@au_lname", txtLastName.Text) cmd.Parameters.AddWithValue("@phone", txtPhone.Text) cmd.Parameters.AddWithValue("@address", txtAddress.Text) cmd.Parameters.AddWithValue("@city", txtCity.Text) cmd.Parameters.AddWithValue("@state", txtState.Text) cmd.Parameters.AddWithValue("@zip", txtZip.Text) cmd.Parameters.AddWithValue("@contract", Val(chkContract.Checked)) cmd.Parameters.AddWithValue("@au_id_original", lstAuthor.SelectedItem.Value) ' Try to open database and execute the update. Dim updated As Integer = 0 Try con.Open() updated = cmd.ExecuteNonQuery() lblResults.Text = updated.ToString() & " record updated." Catch err As Exception lblResults.Text = "Error updating author. " lblResults.Text &= err.Message Finally con.Close() End Try ' If the update succeeded, refresh the author list. If deleted > 0 Then FillAuthorList() End If End Sub The update code is similar to the code for inserting a record. The main differences are as follows:

The adjustable cells (also referred to as changing cells) are the cells that Solver will change (adjust the values of) to achieve the desired objective. In Figure 4-3, the eligible adjustable cells are B2 through F5. In Figure 4-3, you could choose all of the eligible adjustable cells. The constraints are the problem s restrictions that you place on the adjustable cells. Solver must adhere to these constraints as it tries to change the adjustable cells to meet the objective. In Figure 4-3, you could create two possible constraints. First, you could constrain the problem so that none of the adjustable cells (cells B2 through F5) values can be less than 2. Second, you could require all of the adjustable cells (again, cells B2 through B5) values to be whole numbers (integers). A model is the set of target cell, all adjustable cells, and any constraints for the current problem that you want Solver to solve. When you run Solver using the model as it is defined in this section, Solver produces the results shown in Figure 4-4.