SQL Server Q&A

Even today, there are many companies, to collect a large number of paper work. The work environment of also leader can clutter these documents. To get rid of this mess, most businesses in Manchester self Manchester use to share some significant disk space. There are many reasons for the popularity of self storage services, but is one of the leading price/performance ratio. Although the world has moved into the digital age, but there are many organizations that can do without important paperwork. Some of the companies or organizations would market research company with huge forms to include law firms, and hospitals with large patient data. There are various forms of legislation and business need to so the company must have these documents for many years, until they can be destroyed.

Although companies have some room for the storage, but this space ideal fit the most recently used documents. In addition, piles with monthly pass the paperwork only up in the Office. This is a shabby look at the location. The arena ever competent essential clean and attractive environment to good business to get in. So, companies are looking to get rid of this disorder by using the services of the storage room self Manchester. Entrepreneurs can storage capacity at its site and pick up units that meet their needs. Employees need access to the on-going projects and store them offsite is not for the business. Self storage in the store rooms Manchester usually charges a certain for retrieval and delivery of certain documents. Therefore, entrepreneurs should a list of documents of that must be filled to not more useful but still for future reference.

Symptoms
The System.Environment class has methods to read the environment variables. However, this class hasno method to set the environment variables for the current process.
Resolution
To work around this problem, use the interop services to set the environment variables. You can set an environment variable by using the Microsoft Platform Software Development Kit (SDK) SetEnvironmentVariable function.
To set an environment variable by calling the Platform SDK SetEnvironmentVariable function, follow these steps: Start Microsoft Visual Studio 2005 or Microsoft Visual Studio .NET. On the File menu, point to New, and then click New Project.In the New Project dialog box, click Visual C# Projects.
Note In Visual Studio 2005, Visual C# Projects is be changed to Visual C#.Under Templates, click Console Application, and then click OK. By default, the Class1.cs file is created.In the code view of the Class1.cs file, specify the using statement to declare the namespaces so that you do not have to qualify the declarations later in the code. Paste the following code in the Class1.cs file:

using System;using System.Runtime.InteropServices;using System.Security;using System.Security.Permissions;Declare the static method and the extern method. Use the DllImport attribute to import the Kernel32.dll file. This declaration indicates that the definition of the function is outside the code. To do this, paste the following code in the Class1.cs file:

// Import the Kernel32 dll file.[DllImport("kernel32.dll",CharSet=CharSet.Auto, SetLastError=true)][return:MarshalAs(UnmanagedType.Bool)]// The declaration is similar to the SDK functionpublic static extern bool SetEnvironmentVariable(string lpName, string lpValue);Paste the following code in the Class1.cs file to add a static method in the class that calls the SetEnvironmentVariable method and that sets the environment variable:

public static bool SetEnvironmentVariableEx(string environmentVariable, string variableValue){ try { // Get the write permission to set the environment variable. EnvironmentPermission environmentPermission = new EnvironmentPermission(EnvironmentPermissionAccess.Write,environmentVariable); environmentPermission.Demand(); return SetEnvironmentVariable(environmentVariable, variableValue); } catch( SecurityException e) { Console.WriteLine(“Exception:” + e.Message); } return false;}Paste the following code in the Main method to set an environment variable:

// Create a sample environment variable and set its value (for the current process).SampleSetEnvironmentVariable.SetEnvironmentVariableEx(“TESTENV”, “TestValue”);Paste the following code to display the environment variable value:

// Verify that environment variable is set correctly.Console.WriteLine(“The value of TESTENV is: ” + Environment.GetEnvironmentVariable(“TESTENV”));Complete Code Sample

using System;using System.Runtime.InteropServices;using System.Security;using System.Security.Permissions;namespace SetEnv{ /// <summary> /// Summary description for Class1. /// </summary> public class SampleSetEnvironmentVariable {// Import the kernel32 dll.[DllImport("kernel32.dll",CharSet=CharSet.Auto, SetLastError=true)][return:MarshalAs(UnmanagedType.Bool)]// The declaration is similar to the SDK functionpublic static extern bool SetEnvironmentVariable(string lpName, string lpValue); public SampleSetEnvironmentVariable() { } public static bool SetEnvironmentVariableEx(string environmentVariable, string variableValue) { try { // Get the write permission to set the environment variable. EnvironmentPermission environmentPermission = new EnvironmentPermission(EnvironmentPermissionAccess.Write,environmentVariable); environmentPermission.Demand(); return SetEnvironmentVariable(environmentVariable, variableValue); } catch( SecurityException e) { Console.WriteLine(“Exception:” + e.Message); } return false; } } class MyClass { /// <summary> /// The main entry point for the application. /// </summary> [STAThread] static void Main(string[] args) { // Create a sample environment variable and set its value (for the current process). SampleSetEnvironmentVariable.SetEnvironmentVariableEx(“TESTENV”, “TestValue”); // Verify that environment variable is set correctly. Console.WriteLine(“The value of TESTENV is: ” + Environment.GetEnvironmentVariable(“TESTENV”)); } }}