ASP.NET MVC 4 Useful Links

Release Note
       http://www.asp.net/whitepapers/mvc4-release-notes

Using Asynchronous Methods in ASP.NET MVC 4

         http://www.asp.net/mvc/tutorials/mvc-4/using-asynchronous-methods-in-aspnet-mvc-4

Bundling and Minification

      http://www.asp.net/mvc/tutorials/mvc-4/bundling-and-minification

Asp.net MVC 4 Article Series by Nandip Makwana

      http://www.dotnetexpertguide.com/2011/09/aspnet-mvc-4-article-series.html

           

Create a Custom Authorize Attribute in ASP.NET MVC

 Sample code for a creating a simple Authorize attribute. 
A user with "admin" username can only access the action which is decorated by [AdminAuthorize] attribute.

public class AdminAuthorize : AuthorizeAttribute
    {
        //return true if username is admin else return false
        protected override bool AuthorizeCore(HttpContextBase httpContext)
        {
            if (!httpContext.User.Identity.IsAuthenticated)
            {
                return false;
            }
            Users = httpContext.User.Identity.Name.ToLower();

 
            return (Users == "admin");
        } 
    }

Parse a string to Enum

 if (Enum.IsDefined(typeof(EnStatus), this.HttpContext.Request.Form["payment_status"]))             {                 result.status = (EnStatus)Enum.Parse(typeof                  (EnStatus), this.HttpContext.Request.Form["payment_status"]);             }

http://blogs.msdn.com/b/tims/archive/2004/04/02/106310.aspx

Displaying popup in WPF

      A Popup window is a window that float over a window.In this blog post i’m going to to explain how can we create a sexy popup window like message box using xaml.Wpf has a popup control

Syntax

<Popup></Popup>

      Popup control can have a child inside the popup tags.If we want to add more contents we can use any layout panels like grid, stackpanel etc.
In popup if we set IsOpen property to true then the popup will be displayed and If IsOpen = false then the popup will be closed. In this example we will set IsOpen = true whenever we click on validate button and we will set it to false when we clicked on OK button.

xaml

<Popup Name="myPopup" IsOpen="False" PlacementTarget="{Binding ElementName=ProjectTasks}" Placement="Center">
      <Grid Width="300" Background="Gray">
          <Grid.RowDefinitions>
              <RowDefinition Height="Auto"/>
              <RowDefinition Height="*"/>
              <RowDefinition Height="Auto"/>
         </Grid.RowDefinitions>
      <Border Grid.RowSpan="3" Background="Gray" BorderBrush="#3a3a3a" BorderThickness="1"/>
            <DockPanel  Width="300" Background="#3a3a3a" LastChildFill="True">
                <Image Source="/Images/Icons/attention.png" Width="15" Height="15" Margin="3"  DockPanel.Dock="Left"/>
<TextBlock  Padding="3" Grid.Row="0" Background="#3a3a3a" Text="Information" Foreground="White" FontWeight="Bold"/>
                </DockPanel>
              <TextBlock Width="260" Grid.Row="1" Margin="5" TextWrapping="Wrap" Foreground="white" Text="{Binding Path=ProjectValidateMessage}"></TextBlock>     

<Button Width="40" Height="20" Margin="5" Grid.Row="2" x:Name="btnPopup" Click="btnPopup_OnClick" Content="Ok" />
                        
      </Grid>
</Popup>

Code Behind:

public void btnPopup_OnClick(object Sender, RoutedEventArgs e)          

{             

    this.myPopup.IsOpen = false;         

}         

public void btnValidate_OnClick(object Sender,RoutedEventArgs e)

{             

    this.myPopup.IsOpen = true;         

}

Find current financial and Calendar Year in SQL Server

declare @d datetime
      set @d = GETDATE()
select
        DATEADD(yyyy, DATEDIFF(yyyy, 0, @d), 0) as [CalendarYear]
select
case
       when DATEPART(M, @d) >= 4 then DATEADD(mm, 3, DATEADD(yyyy, DATEDIFF(yyyy, 0, @d), 0))
        when DATEPART(M, @d) < 4 then DATEADD(mm, -9, DATEADD(yyyy, DATEDIFF(yyyy, 0, @d), 0))
end as [FinancialYear]

How to append a text field to an existing column in SQL Server

update table set fieldName = 'append string'+ fieldName where conditions

Example:

select *from AM_Invoice where DocumentTypeId = 3 and SalesInvoiceType = 2
update AM_Invoice set InvoiceNumber = 'B/'+InvoiceNumber where DocumentTypeId = 3 and SalesInvoiceType = 2
select *from AM_Invoice where DocumentTypeId = 3 and SalesInvoiceType = 2

result:

Samsung reveals Galaxy SIII

Samsung reveals their most awaited android phone Galaxy SIII in an event held at London