Products sale project in WPF using Expression Blend: Part 2

Things will be more clear from the fig below:

At the same time the login window should also be able to hold the value from this window for this we code these lines in the login window. Infact we are creating a parameterized constructor of the MainWindow or the login window which takes parameter from the user window or register window. This parameter here is the password generated in the user window.

using System;
using System.Collections.Generic;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;

namespace product_of_sale_application
{
public partial class MainWindow : Window
{
public MainWindow()
{
this.InitializeComponent();
}
public MainWindow(string value1)
{
string value = value1;
label.Visibility =System.Windows.Visibility.Visible;
label.Content= value;
}

private void log(object sender, System.Windows.RoutedEventArgs e)
{
if (username.SelectionBoxItem.Equals("Administrator") & txtpass.Text=="mcn solutions")
{
Admin adm = new Admin();
adm.Show();
this.Close();
}
else
{
if (username.SelectionBoxItem.Equals("User")& txtpass.Text=="value" )
{
label.Visibility =System.Windows.Visibility.Visible;
label.Content = " Please Sign up first ";
Admin adm = new Admin();
adm.Show();
this.Close();
}
else
{
label.Visibility =System.Windows.Visibility.Visible;
label.Content= "Please Enter valid password";
}
}
}
}
}

Step 6 : Now again Go to Project--> Add new item-->select window and name it as "Admin". This window is for the Product details and information for buy and sell activity after sucessful logging in. Design this window like this :

Step 7 : This Admin window is same for both the User as well as the User but the only difference is that Admin can modify the values, add product, delete product etc by providing the Administrator password. This is done through the click event of Modify button, When modify button is clicked the windows shows three new controls i.e. one is the label showing Text - Enter Password , second is the textbox which accepts the password and third is the Go button. On click of this Go button it checks the correctness of the password and if the password is correct then other controls such as - Add product, Delete Product, Add quantity, Add new Price becomes visible and if the password do not match all the controls go hidden again.

Step 8 : To include this functionality write the following code on the modify button click:

private void modifyclick(object sender, System.Windows.RoutedEventArgs e)

{
modifypass.Visibility =System.Windows.Visibility.Visible;
adminpass2.Visibility = System.Windows.Visibility.Visible;
go.Visibility = System.Windows.Visibility.Visible;
}

Here the password controls become visible first on modify click.

Step 9 : Then After the user enters the password the further event is managed by the Go button click. It matches the password and sets the visibility of other controls visible or hidden depending on the password. The code below is for Go button click event:

private void Button_Click(object sender, System.Windows.RoutedEventArgs e)
{
if (adminpass2.Text == "mcn solutions") // This is the preset password for Admin User.
{
tnewp.Visibility = System.Windows.Visibility.Visible;
tq.Visibility =System.Windows.Visibility.Visible;
btnnp.Visibility =System.Windows.Visibility.Visible;
btncp.Visibility = System.Windows.Visibility.Visible;
btnqty.Visibility =System.Windows.Visibility.Visible;
btndp.Visibility = System.Windows.Visibility.Visible;
}
else
{
modifypass.Visibility =System.Windows.Visibility.Hidden;
adminpass2.Visibility = System.Windows.Visibility.Hidden;
tnewp.Visibility = System.Windows.Visibility.Hidden;
tq.Visibility =System.Windows.Visibility.Hidden;
btnnp.Visibility =System.Windows.Visibility.Hidden;
btncp.Visibility = System.Windows.Visibility.Hidden;
btnqty.Visibility =System.Windows.Visibility.Hidden;
btndp.Visibility =System.Windows.Visibility.Hidden;
}
}

Step 10 : Since we are working with none borderstyle window so we have to create own Exit button to quit from the application for this add a button named exit and labeled as EXIT and write the line on its click event :

private void exit(object sender, System.Windows.RoutedEventArgs e)
{
this.Close();
}

Step 11 : Now after the correct match of the admin password the add product and delete product button should work by this code:

private void newproduct(object sender, System.Windows.RoutedEventArgs e)
{
Products.Items.Add(tnewp.Text);
}

private void delete(object sender, System.Windows.RoutedEventArgs e)
{
k = Products.Items.IndexOf(tnewp.Text);
Products.Items.RemoveAt(k);
}

Note : In this application I have included only adding and deleting of product. The modified application to include added functionality will be available very soon.

Output :

On Admin Login select Admin from the combobox.

Enter password Wrong password

Select User from the combobox and click login. The register page opens up.

Fill all the fields and the window is redirected to main window with user password.

If fields are not filled completely, Validation error arises.

Now Log in with correct password this window opens up.

Click "MODIFY" button and enter administrator password and all controls becomes visible. Now you can add and delete products and watch them added or deleted from the Item box

Hope All the stuff that was available to was sufficient enough to clear all the basic concepts regarding an application in WPF using Expression Blend. Do post your comments.