Ниже представлен интерфейс IMedia и реализация Media. Медиа - это частичный класс с первичным классом, созданным с помощью файла LinqToSql DBML. Это относится ко всем перечисленным выше типам в списке привязок.
public interface IMedia : IValidationDictionary, IBaseDescriptor {
/// <summary>
/// Returns a specific Media object specifying
/// if you want the full or lite version
/// </summary>
/// <param name="id"></param>
/// <param name="isLite"></param>
/// <param name="context"></param>
/// <returns></returns>
IMedia Get(long id, bool isLite, DataContext context);
/// <summary>
/// Returns the lite version of the request Media object
/// </summary>
/// <param name="id"></param>
/// <param name="context"></param>
/// <returns></returns>
IMedia Get(long id, DataContext context);
/// <summary>
/// Returns a list of Media Objects
/// </summary>
/// <param name="isLite"></param>
/// <param name="context"></param>
/// <returns></returns>
ValidationList<IMedia> List(bool isLite, DataContext context);
/// <summary>
/// Returns a list of Media Objects with pagination capabilities
/// </summary>
/// <param name="isLite"></param>
/// <param name="skip"></param>
/// <param name="top"></param>
/// <param name="context"></param>
/// <returns></returns>
ValidationList<IMedia> List(bool isLite, int skip, int top, DataContext context);
}
public partial class Media : BaseDescriptor, IMedia {
#region Constructors
public Media(String key, IError error)
: base() {
AddError(key, error);
}
#endregion
#region Properties
public MediaType Type {
set { if (TypeID <= 0) { MediaType = value; } }
get { return MediaType; }
}
#endregion
#region Internal Methods
/// <summary>
/// Truncates relationships as appropriate to reduce over-the-wire size
/// </summary>
protected override void MakeLite() {
MediaRelateds = new EntitySet<MediaRelated>();
}
/// <summary>
/// Validates the values and returns true if there are no problems.
/// </summary>
override public bool Validate() {
this.ClearErrors();
if (this.TypeID <= 0) { this.AddError("TypeID", new Error(ErrorType.VALIDATION, "TypeID is missing or invalid")); }
if (string.IsNullOrEmpty(this.Path)) { this.AddError("Path", new Error(ErrorType.VALIDATION, "Path is missing or invalid")); }
if (this.CreatedOn.Year <= 1900) { this.AddError("CreatedOn", new Error(ErrorType.VALIDATION, "CreatedOn is missing or invalid")); }
if (this.CreatedBy <= 0) { this.AddError("CreatedBy", new Error(ErrorType.VALIDATION, "CreatedBy is missing or invalid")); }
if (this.UpdatedOn.Year <= 1900) { this.AddError("UpdatedOn", new Error(ErrorType.VALIDATION, "UpdatedOn is missing or invalid")); }
if (this.UpdatedBy <= 0) { this.AddError("UpdatedBy", new Error(ErrorType.VALIDATION, "UpdatedBy is missing or invalid")); }
if (!string.IsNullOrEmpty(this.Path) && this.Path.Length > 255) { this.AddError("Path", new Error(ErrorType.VALIDATION, "Path is longer than the maximum of 255 characters")); }
return (this.ErrorCount == 0);
}
#endregion
#region Public Methods
public ValidationList<IMedia> List(bool isLite, DataContext context) {
return List(isLite, 0, 0, context);
}
public ValidationList<IMedia> List(bool isLite, int skip, int top, DataContext context) {
if (context == null) { context = new DataContext(); }
var query = context.Medias.Where(x => x.DeletedOn == null);
List<Media> results;
if (skip > 0 || top > 0) {
if (top > 0) {
if (skip < 0) { skip = 0; }
results = query.OrderBy(x => x.ID).Skip(skip).Take(top).ToList();
} else {
results = query.OrderBy(x => x.ID).Skip(skip).ToList();
}
} else {
results = query.OrderBy(x => x.ID).ToList();
}
var finalResult = new ValidationList<IMedia>(new List<IMedia>());
foreach (var result in results) {
result.IsLite = isLite;
finalResult.Source.Add(result);
}
return finalResult;
}
public IMedia Get(long id, DataContext context) {
return Get(id, false, context);
}
public IMedia Get(long id, bool isLite, DataContext context) {
if (context == null) { context = new DataContext(); }
var results = context.Medias.Where(x => x.ID == id && x.DeletedOn == null).ToList();
var result = (results.Count > 0 ? results[0] : null);
if (result != null) {
result.IsLite = isLite;
}
return result;
}
#endregion
}