Hello World Ready Sample

Artigo
12/03/2008

The Hello World Ready sample demonstrates the basic operations that are involved in creating, deploying, and testing a simple world ready common language runtime (CLR) integration-based stored procedure. A world-ready component can be easily localized into different languages for different markets around the world without changing the component's source code. This sample also demonstrates how to return data through an output parameter and through a record, which is dynamically constructed by the stored procedure and returned to the client.

This sample is almost identical to the Hello World Sample except that it is much easier and safer to localize this application. To change localized text requires the following:

Changing an XML file (the .resx file) for the particular culture in the resources directory
Building the culture's resources file by using resgen
Building the updated satellite DLL for that culture
Dropping and adding that assembly in SQL Server.

The source code and assembly for the CLR stored procedure itself does not change. A build.cmd script is provided in the resources directory which demonstrates how to compile and link the resource assemblies.

Although the source code for the application creates a resource manager based the currently executing assembly, you do not have to embed the culture neutral resources in the DLL that contains the stored procedure. The System.Resources.NeutralResourcesLanguage attribute that is used in the AssemblyInfo.cs or AssemblyInfo.vb file permits the culture-neutral resources to exist in a satellite DLL. It is much better to use a separate DLL for this purpose so that when localized text needs to be added or changed, the primary DLL that contains the CLR stored procedure does not have to be changed. This is especially useful for CLR user-defined types that might have columns and other dependencies which would make it difficult to drop and re-add the type.

Ordinarily, the satellite DLL versions must be identical to the main assembly version. However, you can use the SatelliteContractVersion attribute to allow the main assembly to be updated without updating the satellite assemblies too. For more information, see the ResourceManager class in the Microsoft .NET Framework version 2.0 SDK documentation.

Install directory: drive:\Program Files\Microsoft SQL Server\90\Samples\Engine\Programmability\CLR\HelloWorldReady\

Scenario

Jane is a developer for Adventure Works Cycles. She has to understand the basics in using CLR integration stored procedures. She also has to understand how to make her CLR integration stored procedures world ready using resources which is the technique her team uses.

Languages

Transact-SQL, Visual C# and Visual Basic.

Features

The Hello World Ready sample uses the following features of SQL Server.

Application Area	Features
Overall	CLR, metadata
Localization	Resources

Prerequisites

Before running this sample, make sure the following software is installed:

Microsoft SQL Server 2005 or Microsoft SQL Server 2005 Express Edition (SQL Server Express). You can obtain SQL Server Express free of charge from the SQL Server 2005 Express Edition Documentation and Samples Web site
The AdventureWorks database which is included with SQL Server 2005, and is also available at the SQL Server Developer Web site.
The SQL Server 2005 Database Engine samples. These samples are included with SQL Server 2005. You can download the latest version of the samples at the SQL Server Developer Web site.
.NET Framework SDK 2.0 or Microsoft Visual Studio 2005. You can obtain .NET Framework SDK free of charge. See Installing the .NET Framework SDK.

Building the Sample

If you have not already created a strong name key file, generate the key file using the following instructions.

To generate a strong name key file

Open a Microsoft Visual Studio 2005 command prompt. Click Start, point to All Programs, point to Microsoft .NET Framework SDK 2.0, and then click SDK Command Prompt.

-- or --

Open a Microsoft .NET Framework command prompt. Click Start, point to All Programs, point to Microsoft .NET Framework SDK 2.0, and then click SDK Command Prompt.
Use the change directory command (CD) to change the current directory of the command prompt window to the folder where the samples are installed.

Note

To determine the folder where samples are located, click the Start button, point to All Programs, point to Microsoft SQL Server, point to Documentation and Tutorials, and then click Samples Directory. If the default installation location was used, the samples are located in <system_drive>:\Program Files\Microsoft SQL Server\100\Samples.
At the command prompt, run the following command to generate the key file:

sn -k SampleKey.snk

Important

For more information about the strong-name key pair, see "Security Briefs: Strong Names and Security in the .NET Framework" in the .NET Development Center on MSDN.

To build the Hello World Ready sample

Compile the sample by using Visual Studio 2005 and the provided Visual Studio solution, or by using Microsoft MSBuild, which is included in the .NET Framework SDK 2.0. Run a command similar to the following at an SDK command prompt:

msbuild /nologo /verbosity:quiet /property:Configuration=Debug CS\ HelloWorld.sln
Compile the satellite assemblies by executing the provided build.cmd file in the resources directory at a .NET Framework or Visual Studio command prompt. This file invokes resgen, which is included in Visual Studio or the .NET Framework SDK.
Make sure that the AdventureWorks database is installed.
If you did not install the SQL Server Database Engine samples in the default location, modify the path in the CREATE ASSEMBLY section of the script in Scripts\InstallCS.sql and Scripts\InstallVB.sql to refer to the location where the samples were installed.
If you are not an administrator for the SQL Server instance you are using, you must have an administrator grant you CreateAssembly permission to complete the installation.
Open the scripts\installCS.sql or scripts\installVB.sql file, depending on whether you compiled the Visual C# project or the Visual Basic project, in Microsoft SQL Server Management Studio. Run the script that is contained in the file, or run a command similar to the following at the command prompt:

sqlcmd -E -I -i Scripts\InstallCS.sql

Running the Sample

To run the Hello World Ready sample

Open the scripts\test.sql file in Management Studio and run the script that is contained in the file. Or, run the following command at the command prompt:

sqlcmd -E -I -i Scripts\test.sql

Removing the Sample

To remove the Hello World Ready sample

Open the scripts\cleanup.sql file in Management Studio and run the script that is contained in the file. Or, run the following command at the command prompt:

sqlcmd -E -I -i Scripts\cleanup.sql

Comments

The CLR for SQL Server 2005 or SQL Server Express must be enabled for this sample to work correctly.

Samples are provided for educational purposes only. They are not intended to be used in a production environment and have not been tested in a production environment. Microsoft does not provide technical support for these samples. Sample applications and assemblies should not be connected to or used with your production SQL Server database or your report server without the permission of the system administrator.

Change History

Release	History
5 December 2005	Changed content: Changed instructions for generating a key file, including the name and location of the key file.

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