This is an error message that sometimes you will see when you run your ASP.NET MVC 4.

Could not load type 'System.Web.WebPages.DisplayModes' from assembly 'System.Web.WebPages, Version=2.0.0.0

So, today I will discuss how to fix it on your shared hosting environment. The basic problem is that there is a mixup between MVC 4 Developer Preview and MVC 4 Beta .dlls in the project. To see which version you have right click the .dll file in Windows Explorer and choose Properties->Details. Look for   'File Version' :

- MVC 4 Developer Preview is version 4.0.10906.0
- MVC 4 Beta is version 4.0.20126.16343

Make sure all says the MVC 4 beta version number (replace the .dlls from a fresh MVC 4 Beta project if necessary) for these files:

- System.Web.Mvc
- System.Web.WebPages
- System.Web.Razor
- System.Web.WebPages.Deployment
- System.Web.WebPages.Razor

Then please kindly retry and it will work fine. J

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There are two issues that you will find out when you finish the installation of SQL Server 2012 or SQL Server 2008 R2:

1. When you try to access Reporting Services using your IE browser, it will constantly prompt you to enter username and password.
2. After the successful entry of login details in IE, you will get the following error message:

User ‘Domain\User’ does not have required permissions. Verify that sufficient permissions have been granted and Windows User Account Control (UAC) restrictions have been addressed.



To resolve the first issue, please read the following article:

SSRS Prompt username and password

Here is the steps that you need to do to resolve the second issue:

1. From Start > All Programs > Internet Explorer, Right Click and choose Run as administrator



2, Enter the Reporting Services URL: http://localhost/Reports_SQLExpress

3. Running as administrator will allow you to have access to Site Settings. Click on it:



4. You will see the General Site Settings page:



5. Click on Security from the left side menu and choose New Role Assignment:



6. Add the username or Group that you want to grant permission to and select the appropriate role:



7. Now go to Home page and click on Folder Settings. Add the username or Group that you want to grant permission to the main Home page:



8. All done now. You can normally open IE and it will work without an AUC error. You can also create Folders within the Home page and restrict access to specific users.

After the successful installation of SQL Sever Reporting Services 2012 or 2008 R2, you will get constantly prompted with Windows Security dialog box to enter login details. This is related to IE9 which ships with Windows 7 operating systems.



It is easy to fix this issue by following these steps:

1. Open Internet Explorer (IE9) and from the tools menu, choose Internet Options:



2. From the Security Tab, choose Local intranet and click on Sites:



3. Click on Advanced button:



4. Type in localhost in Add this website text field and click on Add button (Un-tick the box Require server verification (https:) for all sites in this zone):



All done. If you open your IE again and type in Reporting Services URL, you will no longer be prompted to enter login details.

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Types of Grids

One of the most common misconceptions is the notion that a grid is a grid. In reality, there are several different types of grids and choosing the right one for your needs can help save substantial time and effort. Choosing the wrong grid can result in tremendous effort to make it work the way you need, which is quite frustrating. We will look at the different types of grids and the ways in which they are typically used.

Cell-oriented Grids

- No assumptions on layout - Cell-oriented grids do not make any assumptions on the layout of data. They work very well when you wish to have complete control over the layout. They allow you to display data that flows over multiple cells and embed controls such as charts that occupy several underlying cells. You can mix different kinds of cells in the same column.

- Excel-like behavior - Each cell is independent of other cells. Commonly, you're able to set 50 different attributes on each cell.

- Formula support - Cell-oriented grids typically offer support for cell-level formulas, similar to Excel.

- No assumptions on data source - Cell-oriented grids do not expect data to be in a certain format. They allow data to be provided on demand from any source. Binding to data usually involves the implementation of simple callbacks.

Data-bound Grid Controls

- Homogenous columns - Data-bound grid controls assume that data in a column will be the same type. They work best when most of your data comes from a straight tabular data source and can be displayed in the same layout. They do not work well if you wish to have more control over the layout of your display.

- Binding to standard types - Data-bound grid controls can be bound to any standard data source with a few lines of code.

- Rich metadata - Data-bound grids utilize type metadata and other information available from data-binding interfaces. Operations such as sorting, filtering, and grouping are also easier to implement with data-bound grids because of this rich metadata.

- Support for editing - Support for editing is implemented in most data-bound grid controls. If the backing data store supports editing, adding new rows, and deleting current rows, such support will automatically become available in data-bound grids.

- Support for automatic updates - Data-bound grid controls can automatically display changes to the data source to which they are bound, provided the data source implements appropriate interfaces.

- Business objects - Data-bound grid controls support displaying data in business objects, provided such data will support one of the commonly used .NET data-binding interfaces.

- Delegating common operations to the server - It is typically desirable to delegate such operations to the server. This is the default behavior with most controls.

- Support for expressions or formulas - Data-bound grid controls do not typically support cell-level formula calculations (like Excel). They instead offer unbound columns where simple expressions may be used to calculate the displayed value. If you need Excel-like formulas, then a cell-oriented grid is a better choice.

- Displaying related data - Data-bound grids that support displaying related information display such data inline. This is referred to as a hierarchical display or nested table. It is possible for a hierarchical grid to support editing and differing levels in nested tables.

- Displaying foreign key references - When you have a foreign key relationship, data-bound grid controls should easily display values from the related table.

- Displaying grouped data - Grouping classifies a list of data based on one or more fields. Data-bound grids can support grouping, along with custom summaries and data updates with multiple field groupings.

Pivot Grids

Pivot grids are very powerful and allow for the display and analysis of massive amounts of data in a summarized, condensed format. Please be sure to test with at least five times the data you expect to work with (both rows and columns). Also, test with several grouping levels on both the row and column axes.

Tree Grids

Tree grids resemble tree controls, but instead of displaying just one column of information, as with a typical tree, they display additional attributes as additional columns. Test for editing and load-on-demand support.

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In this article, I will discuss new features of LightSwitch. In Visual Studio 2012, LightSwitch is included as a core part and we can create the LightSwitch application from Visual Studio 2012 IDE. LightSwitch will be available as a Project Template group Node in the Visual Studio 2012.

New LightSwitch Architecture

Visual Studio 2012 LightSwitch has a lot of enhancements including OData Services which leads to define the new architecture for the LightSwitch Application Development.

Microsoft Visual Studio LightSwitch is a development environment designed to simplify and shorten the development of typical forms-over-data applications for businesses. Regardless of your development skills—whether you're a beginner or an experienced developer—LightSwitch enables you to quickly create professional-quality business applications and data services. – From MSDN

You can get more details about the LightSwitch Architecture, please have a look at MSDN.

New Enhancements in LightSwitch 2012

There are ton of new features included in the Visual Studio 2012 LightSwitch. We will briefly discuss about all the new features of the new enhanced LightSwitch.

Connecting with OData Services:

LightSwitch 2012 now supports Open Data Protocol Services.

The Open Data Protocol (OData) is a Web protocol for querying and updating data that provides a way to unlock your data and free it from silos that exist in applications today. – From OData

We can represent the data from a published Visual Studio LightSwitch web application as an OData Data source which can consumed by other applications.

Formatting Numbers & Dates:

We can easily format the Numbers and Dates using Format Pattern property in LightSwitch 2012. This Format Pattern Property is available only for the particular data types.

New Data Types in LightSwitch:

Visual Studio LightSwitch team has introduced two more Data Types namely Percent and Web Address. Here the Decimal will be treated as Percent business type and the String will be treated as Web Address.

Static Label & Image Control:

LightSwitch 2012 includes two more controls which can be used to display the content statically without binding data. These controls can be used to display the static texts about the organization and logo.

Improved Application Security:

In LightSwitch Business Application we can apply security by two ways like Forms Authentication and Windows Authentication, In Windows Authentication it is possible to provide the Roles & Permissions to Active Directory User Groups.

Download Visual Studio 2012

You can download the Visual Studio 2012 90 days trail version from the Microsoft site.

http://www.microsoft.com/visualstudio/11/en-us/downloads

Summary

Well, we done with the brief intro about the new features of Visual Studio LightSwitch 2012. If you want to try this new features, you can start your LightSwitch site with us.