C# 4 and .NET 4

Creating Custom Cultures ❘ 601
In the implementation of InternalGetResourceSet(), check first if the resource set for the culture queried
for a resource is already in the hash table; if it already exists, return it to the caller. If the resource set is not
available, create a new DatabaseResourceSet object with the queried culture, add it to the dictionary, and
return it to the caller:
protected override ResourceSet InternalGetResourceSet(
CultureInfo culture, bool createIfNotExists, bool tryParents)
{
DatabaseResourceSet rs = null;
}
}
if (resourceSets.ContainsKey(culture.Name))
{
rs = resourceSets[culture.Name];
}
else
{
rs = new DatabaseResourceSet(connectionString, culture);
resourceSets.Add(culture.Name, rs);
}
return rs;
Client application for databaseresourcereader
The way the class ResourceManager is used from the client application here does not differ much
from the previous use of the ResourceManager class. The only difference is that the custom class
DatabaseResourceManager is used instead of the class ResourceManager. The following code snippet
demonstrates how you can use your own resource manager.
A new DatabaseResourceManager object is created by passing the database connection string to the
constructor. Then, you can invoke the GetString() method that is implemented in the base class as you did
earlier, passing the key and an optional object of type CultureInfo to specify a culture. In turn, you get a
resource value from the database because this resource manager is using the classes DatabaseResourceSet
and DatabaseResourceReader.
var rm = new DatabaseResourceManager(
@"server=(local)\sqlexpress;database=LocalizationDemo;" +
"trusted_connection=true");
string spanishWelcome = rm.GetString("Welcome", new CultureInfo("es-ES"));
string italianThankyou = rm.GetString("ThankYou", new CultureInfo("it"));
string threadDefaultGoodMorning = rm.GetString("GoodMorning");
code snippet DatabaseResourceReaderClient/Program.cs
CreaTing CusTom CulTures
Over time, more and more languages have become supported by the .NET Framework. However, not all
languages of the world are available with .NET. You can create a custom culture. Some examples of when
creating custom cultures can be useful are to support a minority within a region or to create subcultures for
different dialects.
Custom cultures and regions can be created with the class CultureAndRegionInfoBuilder in the
namespace System.Globalization. This class is located in the assembly sysglobl.
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