private static void EchoConfigurationMetadata(string[] metadataKey, List <MetadataModel> libMetadata)
{
Console.WriteLine("Echo of read information:");
libMetadata.ForEach(c =>
{
Console.WriteLine("\tLibrary Name (key): [{0}]", c.LibraryName);
Console.WriteLine("\tClass Name: [{0}]", c.ClassName);
Console.WriteLine("\tAssembly Path and Name: [{0}]", c.AssemblyPathAndName);
});
MetadataModel currContextMetadata = libMetadata
.Where(lib => lib.LibraryName.ToLower() == metadataKey[0].ToLower()).FirstOrDefault();
if (libMetadata == null || libMetadata.Count == 0)
{
string msg = string.Format("LibMetadata not parsed correctly [is null = {0}]",
libMetadata == null ? "true" : "false");
throw new ApplicationException(msg);
}
if (currContextMetadata == null)
{
string msg = string.Format("Not able to find library key [{0}] in array.", metadataKey[0]);
throw new ApplicationException(msg);
}
string assemblyFullName = currContextMetadata.AssemblyPathAndName;
string namespaceAndClassname = currContextMetadata.ClassName;
Console.WriteLine("Number of array elements read from json file: {0}", libMetadata.Count);
Console.WriteLine("Selected Resource (key: [{0}]):\n\tLibrary Name: [{1}]\n\tClass Name: [{2}]",
metadataKey[0], currContextMetadata.LibraryName, currContextMetadata.ClassName);
}
static void Main(string[] args)
{
try
{
// Get config Info, parse to BOs
IConfiguration cfg = GetConfig();
List <MetadataModel> libMetadata = GetFromCfg_ArrayOfAvailableDbContexts(cfg);
string libNameToUse = GetFromCfg_NameOfLibraryToUseForDbContext(cfg);
MetadataModel currContextMetadata = libMetadata
.Where(lib => lib.LibraryName.ToLower() == libNameToUse.ToLower()).FirstOrDefault();
// Find and load DbContext assembly
Assembly b = Assembly.GetEntryAssembly();
string[] sNames = b.GetManifestResourceNames();
Assembly a = Assembly.LoadFrom(currContextMetadata.AssemblyPathAndName);
Type[] allTypesInAssembly = a.GetTypes();
Type myDbContextAssemblyInfo = allTypesInAssembly
.Where(r => r.FullName == currContextMetadata.ClassName)
.FirstOrDefault();
if (myDbContextAssemblyInfo == null)
{
string msg = string.Format(
"The host specified class name [{0}] could not be found in the assembly.",
currContextMetadata.ClassName);
throw new Exception(msg);
}
DbContext dContext = Activator.CreateInstance(myDbContextAssemblyInfo) as DbContext;
// Look onto the DbContext for specific table(s) whose content is to be echoed.
DbSet <Student> sList = dContext.Set <Student>();
List <Student> stList = sList.ToList();
Console.WriteLine("\nStudent table contains {0} records.", sList.Count());
stList.ForEach(s => Console.WriteLine("\tStuden Name: {0}", s.Name));
}
catch (Exception ex)
{
Console.WriteLine("Exception encountered:\n\t[{0}]\n\t[{1}]", ex.Message, ex.StackTrace);
}
Console.Write("\nPress any key to close app."); Console.ReadLine();
}
