Gets the Maximum Length of a column table in Entity Framework 5

gistfile1.cs

/// <summary>
/// Gets the Maximum Length of a column table in Entity Framework 5
/// Original from SO:
/// http://stackoverflow.com/questions/12378186/entity-framework-5-maxlength/12964634#12964634
/// You need to add a reference to System.Linq.Expressions
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="column"></param>
/// <returns></returns>
public static int GetColumnMaxLength<T>(Expression<Func<T, string>> column)
{
	int result = 0;
	var modelContext = new Models.MyContext();///<=Your model context
	var objectContext = ((IObjectContextAdapter)modelContext).ObjectContext;
	using (objectContext)
	{
		var entType = typeof(T);
		var columnName = ((MemberExpression)column.Body).Member.Name;

		var test = objectContext.MetadataWorkspace.GetItems(DataSpace.CSpace);

		if (test == null)
			return 0;

		var q = test
			.Where(m => m.BuiltInTypeKind == BuiltInTypeKind.EntityType)
			.SelectMany(meta => ((EntityType)meta).Properties
			.Where(p => p.Name == columnName && p.TypeUsage.EdmType.Name == "String"));

		var queryResult = q.Where(p =>
		{
			var match = p.DeclaringType.Name == entType.Name;
			if (!match)
				match = entType.Name == p.DeclaringType.Name;

			return match;

		})
			.Select(sel => sel.TypeUsage.Facets["MaxLength"].Value)
			.ToList();

		if (queryResult.Any())
			result = Convert.ToInt32(queryResult.First());

		return result;
	}
}