Example of Login form in WPF

Today, I will teach you, how to design login form in WPF. Also, I will teach you, how it will work. In this example, I will take two text boxes, two Text Blocks and one button control from ToolBox. Now, create a database table with some following fields:

 CREATE TABLE [dbo].[users] (  
   [Id]    INT      NOT NULL IDENTITY,  
   [username] NVARCHAR (50) NULL,  
   [password] NVARCHAR (50) NULL,  
   PRIMARY KEY CLUSTERED ([Id] ASC)  
 );

In this database table, I have three column, first column is automatic incremented by one.

 <Window x:Class="WpfApplication5.additemwpflistview"  
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"  
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"  
     Title="additemwpflistview" Height="300" Width="300">  
   <Grid>  
     <TextBlock HorizontalAlignment="Left" Margin="10,41,0,0" TextWrapping="Wrap" Text="UserName" VerticalAlignment="Top"/>  
     <TextBox Name="t1" HorizontalAlignment="Left" Height="23" Margin="94,41,0,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Width="120"/>  
     <TextBlock HorizontalAlignment="Left" Margin="15,91,0,0" TextWrapping="Wrap" Text="Password" VerticalAlignment="Top"/>  
     <TextBox Name="t2" HorizontalAlignment="Left" Height="23" Margin="94,84,0,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Width="120"/>  
     <Button Content="Login" HorizontalAlignment="Left" Margin="94,130,0,0" VerticalAlignment="Top" Width="75" Click="Button_Click"/>  
   </Grid>  
 </Window>

Note: Before doing all such things, must to add EDMX file in the project.

  private void Button_Click(object sender, RoutedEventArgs e)  
     {  
       DatabaseEntities dbe = new DatabaseEntities();  
       if(t1.Text!= string.Empty || t2.Text!=string.Empty)  
       {  
         var users = dbe.users.FirstOrDefault(a => a.username.Equals(t1.Text));  
         if(users!=null)  
         {  
           if(users.password.Equals(t2.Text))  
           {  
             WPFListview l1 = new WPFListview();  
             l1.ShowDialog();  
           }  
         }  
       }  
     }

Code generates the following output: